WO2010110087A1 - 電子デバイスの製造方法 - Google Patents
電子デバイスの製造方法 Download PDFInfo
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- WO2010110087A1 WO2010110087A1 PCT/JP2010/054154 JP2010054154W WO2010110087A1 WO 2010110087 A1 WO2010110087 A1 WO 2010110087A1 JP 2010054154 W JP2010054154 W JP 2010054154W WO 2010110087 A1 WO2010110087 A1 WO 2010110087A1
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- Prior art keywords
- glass substrate
- substrate
- main surface
- thin glass
- support
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
- H10K77/10—Substrates, e.g. flexible substrates
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/02—Details
- H05B33/04—Sealing arrangements, e.g. against humidity
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/1201—Manufacture or treatment
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/87—Passivation; Containers; Encapsulations
- H10K59/871—Self-supporting sealing arrangements
- H10K59/8721—Metallic sealing arrangements
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/80—Manufacture or treatment specially adapted for the organic devices covered by this subclass using temporary substrates
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to an electronic device manufacturing method and an electronic device with a support.
- LCD liquid crystal display devices
- OLED organic EL display devices
- LCD liquid crystal display devices
- electronic devices such as solar cells, thin film secondary batteries, and semiconductor wafers having a circuit formed on the surface are also required to be lighter and thinner.
- thinning of substrates such as glass, resin, and metal used for electronic devices such as display devices has been progressing.
- both outer sides of the display device panel are formed using chemical etching. A method of etching the surface to reduce the thickness of the display device panel is used.
- the glass substrate is thinned by performing chemical etching after forming the display device member on the surface of the glass substrate.
- a problem that an obvious scratch appears that is, a problem of generation of etch pits may occur.
- a thin glass substrate having a thickness of less than 0.7 mm (also referred to as “thin glass substrate”) is bonded to another supporting glass substrate to form a laminate,
- a method of performing a predetermined process for manufacturing the display device in a state and then separating the thin glass substrate and the supporting glass substrate has been proposed.
- Patent Document 1 a product glass substrate and a reinforcing glass substrate are bonded and integrated using an electrostatic adsorption force or a vacuum adsorption force between glass substrates, and a display using the product glass substrate is used. A method of manufacturing the device is described. Further, Patent Document 2 describes a method for manufacturing a liquid crystal display device in which end portions of a substrate and a support of a liquid crystal display device are bonded using a glass frit adhesive, and thereafter an electrode pattern or the like is formed. Has been. Patent Document 3 describes a method for manufacturing a substrate for a display device, which includes a step of irradiating laser light to at least the vicinity of the edge surface of two glass substrates to fuse the two glass substrates.
- Patent Document 4 a substrate is attached to a substrate transport jig having an adhesive layer provided on a support, and the substrate transport jig is transported through a manufacturing process of a liquid crystal display element.
- a liquid crystal display device manufacturing method is described in which liquid crystal display element formation processing is sequentially performed on a substrate attached to a jig, and the substrate is peeled off from the substrate carrying jig after a predetermined process is completed.
- an electrode substrate for a liquid crystal display element is subjected to a predetermined processing on the electrode substrate for a liquid crystal display element using a jig in which an ultraviolet curable adhesive is provided on a support, and then an ultraviolet curable type is used.
- Patent Document 6 describes a transport method in which a thin plate is temporarily fixed to a support plate with an adhesive, a peripheral portion of the adhesive is sealed with a sealant, and the support plate on which the thin plate is temporarily fixed is transported.
- Patent Document 7 discloses a thin glass laminate obtained by laminating a thin glass substrate and a supporting glass substrate, and the thin glass substrate and the supporting glass substrate have peelability and non-adhesiveness.
- a thin glass laminate characterized by being laminated via a silicone resin layer is described. Then, in order to separate the thin glass substrate and the supporting glass substrate, it is only necessary to apply a force to separate the thin glass substrate from the supporting glass substrate in the vertical direction. It is described that it can be more easily peeled off by injecting air into the interface.
- Patent Document 8 describes a double-sided adhesive sheet for manufacturing semiconductors using silicone.
- Patent Document 1 a method for fixing glass substrates described in Patent Document 1 using electrostatic adsorption force or vacuum adsorption force
- a method for fixing both ends of a glass substrate described in Patent Document 2 with glass frit a method for fixing both ends of a glass substrate described in Patent Document 2 with glass frit
- Patent Document 3 In the method of merging two glass substrates by irradiating laser light near the end face of the peripheral portion described in the above, the glass substrates are laminated and adhered without any intermediate layer. Distortion defects occur in the glass substrate due to foreign matters such as dust. Therefore, it is difficult to obtain a glass substrate laminate having a smooth surface.
- the silicone resin layer does not remain on the thin glass substrate after peeling, but some sort of origin derived from the resin layer.
- Substance for example, a compound.
- a low molecular weight compound that is a part of a substance that forms a resin layer and is deposited on the surface of the resin layer. It was thought that this was caused by a slight amount of foreign matter such as dust scattered in the air, metal pieces or machine oil resulting from the manufacturing process on the surface of the thin glass substrate.
- the present inventor has found a method for removing the foreign matter without causing thermal, electromagnetic, mechanical and chemical damage to the thin glass substrate and the display device member attached thereto.
- a display device member such as a thin film transistor, an organic EL element, or a color filter is formed on the surface opposite to the separation surface of the thin glass substrate. This is because there are cases where the two thin glass substrates are made into cells by the sealing agent, and it is necessary to prevent them from being damaged as described above.
- the present invention has been made in view of the above problems. That is, the present invention provides an electronic device by peeling a support made of the resin layer and the support substrate from an electronic device with a support in which a substrate having a member for an electronic device, a resin layer, and a support substrate are laminated. After that, the main surface of the electronic device substrate is not damaged without causing thermal, electromagnetic, mechanical and chemical damage to the substrate and the electronic device member (eg, thin film transistor, organic EL element, color filter).
- a method of manufacturing an electronic device that can remove attached foreign matter and, as a result, can firmly adhere a film with an adhesive such as a polarizing film or a retardation film to the surface of the substrate after peeling with a resin layer attached The purpose is to provide.
- the present inventor has intensively studied in order to solve the above problems, and has completed the present invention.
- the present invention relates to the following (1) to (8).
- a support comprising the support substrate and the resin layer is peeled from an electronic device with a support to which a resin layer having a peelable surface fixed to the main surface is in close contact, and includes the electronic device member and the substrate.
- the manufacturing method of an electronic device which comprises the peeling process which obtains an electronic device, and the removal process which removes the foreign material attached to the 1st main surface of the said board
- the substrate for the electronic device without causing thermal, electromagnetic, mechanical and chemical damage to the substrate and the member for the electronic device (for example, thin film transistor, organic EL element, color filter)
- the member for the electronic device for example, thin film transistor, organic EL element, color filter
- FIG. 1 is a schematic cross-sectional view showing one embodiment of the panel with a support of the present invention.
- FIG. 2 is a schematic front view which shows another one aspect
- FIG. 3 is a schematic cross-sectional view showing another embodiment of the panel with a support of the present invention.
- FIG. 4 is a schematic front view showing another embodiment of the panel with a support of the present invention.
- FIG. 5 is a schematic front view which shows another one aspect
- FIG. 6 is a schematic cross-sectional view showing another embodiment of the panel with a support of the present invention.
- FIG. 7 is a schematic diagram for explaining an example of an atmospheric pressure remote plasma apparatus that can be used in the removing step of the panel manufacturing method of the present invention.
- the electronic device manufacturing method of the present invention (hereinafter also referred to as “the electronic device manufacturing method of the present invention”) is a first substrate having a first main surface and a second main surface and an electronic device member on the second main surface. From the electronic device with a support, in which the resin layer having a peelable surface fixed to the first main surface of the support substrate having the first main surface and the second main surface is in close contact with the main surface, the support substrate and the A peeling step of peeling a support made of a resin layer to obtain an electronic device including the electronic device member and the substrate; and a removing step of removing foreign substances attached to the first main surface of the substrate in the electronic device;
- An electronic device manufacturing method comprising:
- the electronic device with a support used for the peeling step in the electronic device manufacturing method of the present invention that is, the first main surface and the second main surface on the first main surface of the substrate having the first main surface and the second main surface.
- the electronic device with a support in which the resin layer having a peelable surface fixed to the first main surface of the support substrate having a surface is in close contact is also referred to as “the electronic device with a support of the present invention” below.
- the electronic device with a support used in the present invention is provided on the first main surface of the substrate having the first main surface and the second main surface and the electronic device member on the second main surface.
- the resin layer having a peelable surface fixed to the first main surface of the support substrate having the first main surface and the second main surface is in close contact. That is, the electronic device with a support has an electronic device member, a substrate, a resin layer, and a support substrate, which are laminated in this order.
- the electronic device has an electronic device member and a substrate, and the electronic device member is formed on the second main surface of the substrate.
- the electronic device with a support body is one in which a laminate in which a substrate, a resin layer, and a support substrate are laminated in this order is laminated via an electronic device member, that is, a support substrate, a resin layer, a substrate, an electron A device member, a substrate, a resin layer, and a support substrate may be laminated in this order.
- the electronic device refers to an electronic component such as a display panel, a solar cell, a thin film secondary battery, or a semiconductor wafer having a circuit formed on the surface.
- the display device panel includes a liquid crystal panel, an organic EL panel, a plasma display panel, a field emission panel, and the like.
- the manufacturing method of the panel for display apparatuses is called “the panel manufacturing method of this invention”
- the panel for display apparatuses with a support body is called “the panel with a support body of this invention.”
- the thin glass substrate in the panel with a support of the present invention will be described.
- the thickness, shape, size, physical properties (heat shrinkage rate, surface shape, chemical resistance, etc.), composition, etc. of the thin glass substrate are not particularly limited.
- conventional glass for display devices such as LCD and OLED It may be the same as the substrate.
- the thickness of the thin glass substrate is preferably less than 0.7 mm, more preferably 0.5 mm or less, and further preferably 0.4 mm or less. Further, the thickness of the thin glass substrate is preferably 0.05 mm or more, more preferably 0.07 mm or more, and further preferably 0.1 mm or more.
- the shape of the thin glass substrate is not limited, but is preferably rectangular.
- the rectangle is substantially a rectangle and includes a shape obtained by cutting off the corners of the peripheral portion (corner cut).
- the size of the thin glass substrate is not limited, for example, in the case of a rectangle, it may be 100 to 2000 mm ⁇ 100 to 2000 mm, and more preferably 500 to 1000 mm ⁇ 500 to 1000 mm. Even with such a thickness and size, in the present invention, the thin glass substrate and the support can be easily peeled off.
- the heat shrinkage rate is preferably small.
- the linear expansion coefficient which is an index of the thermal shrinkage rate, is preferably 500 ⁇ 10 ⁇ 7 / ° C. or less, more preferably 300 ⁇ 10 ⁇ 7 / ° C. or less, and 200 ⁇ 10 ⁇ 7 / ° C. More preferably, it is 100 ° C. ⁇ 7 / ° C. or less, and further preferably 45 ⁇ 10 ⁇ 7 / ° C. or less.
- a linear expansion coefficient means a thing prescribed
- composition of the glass material of the thin glass substrate may be the same as that of alkali glass or alkali-free glass containing an alkali metal oxide that is conventionally known, for example.
- alkali-free glass is preferable because of its low thermal shrinkage rate.
- the panel with a support of the present invention has a display device member on the second main surface of the thin glass substrate.
- the display device member is composed of a light emitting layer, a protective layer, a TFT array (hereinafter referred to as an array), a color filter, a liquid crystal, and ITO that are provided on the surface of a conventional glass substrate for a display device such as an LCD or OLED. It means various circuit patterns such as transparent electrodes.
- the kind of member for display apparatuses on the 2nd main surface of the said thin glass substrate is not specifically limited.
- a panel for a display device is composed of such a member for a display device and the thin glass substrate.
- the panel with a support of the present invention has a support glass substrate on which a resin layer is fixed as a support on the first main surface of the thin glass substrate.
- the supporting glass substrate is in close contact with the thin glass substrate through the resin layer, and reinforces the strength of the thin glass substrate.
- the thickness, shape, size, physical properties (heat shrinkage rate, surface shape, chemical resistance, etc.), composition, etc. of the supporting glass substrate are not particularly limited.
- the thickness of the supporting glass substrate is not particularly limited, but it is necessary that the supporting glass panel of the present invention has such a thickness that can be processed in the current production line.
- the thickness is preferably 0.1 to 1.1 mm, more preferably 0.3 to 0.8 mm, and still more preferably 0.4 to 0.7 mm.
- the thickness of the supporting glass substrate and the resin layer Together with the thickness it is 0.4 mm.
- the current production line is most commonly designed to process a glass substrate having a thickness of 0.7 mm.
- the thickness of a thin glass substrate is 0.4 mm
- the resin layer The thickness is 0.3 mm.
- the relationship between the thickness of the supporting glass substrate and the relative thickness of the thin glass substrate is not limited, and the thickness of the supporting glass substrate may be larger than the thickness of the thin glass substrate. It may be thinner than the thickness of the thin glass substrate.
- the shape of the supporting glass substrate is not limited, but is preferably rectangular.
- the rectangle is substantially a rectangle and includes a shape obtained by cutting off the corners of the peripheral portion (corner cut).
- the size of the supporting glass substrate is not limited, it is preferably about the same as the thin glass substrate, and slightly larger than the thin glass substrate.
- the longitudinal direction or the lateral direction is larger by about 0.05 to 10 mm. The reason is that it is easy to protect the end portion of the thin glass substrate from the contact of an alignment device such as a positioning pin at the time of manufacturing a panel for a display device, and that the thin glass substrate and the supporting glass substrate are more easily separated. Because it can.
- the supporting glass substrate may have a linear expansion coefficient that is substantially the same as or different from that of the thin glass substrate. Substantially the same is preferable in that the thin glass substrate or the supporting glass substrate is less likely to warp when processed by the panel manufacturing method of the present invention.
- the difference in linear expansion coefficient between the thin glass substrate and the supporting glass substrate is preferably 300 ⁇ 10 ⁇ 7 / ° C. or less, more preferably 100 ⁇ 10 ⁇ 7 / ° C. or less, and 50 ⁇ 10 ⁇ 7 / ° C. More preferably, it is not higher than ° C.
- composition of the glass material of the supporting glass substrate may be the same as that of alkali glass or non-alkali glass, for example.
- alkali-free glass is preferable because of its low thermal shrinkage rate.
- the substrate is a thin glass substrate, but the present invention is not limited to this. From the viewpoint of industrial availability, glass plates, silicon wafers, metal plates, plastic plates and the like are preferable examples.
- the composition of the thin glass substrate may be the same as that of alkali glass or non-alkali glass, for example. Among these, alkali-free glass is preferable because of its low thermal shrinkage rate.
- the type is not particularly limited, for example, in the case of a transparent substrate, polyethylene terephthalate resin, polycarbonate resin, polyethersulfone resin, polyethylene naphthalate resin, polyacrylic resin, polysilicone resin, Examples thereof include transparent fluororesins.
- a transparent substrate polyethylene terephthalate resin, polycarbonate resin, polyethersulfone resin, polyethylene naphthalate resin, polyacrylic resin, polysilicone resin
- transparent fluororesins In the case of an opaque substrate, polyimide resin, fluorine resin, polyamide resin, polyaramid resin, polyether ketone resin, polyether ether ketone resin, various liquid crystal polymer resins, and the like are exemplified.
- a metal plate is employed as the substrate, the type is not particularly limited, and examples thereof include a stainless steel plate and a copper plate.
- the heat resistance of the substrate is not particularly limited, but it is preferable that the heat resistance is high when forming a TFT array of a display device member.
- the 5% heating weight loss temperature is preferably 300 ° C. or higher. Furthermore, it is more preferable that it is 350 degreeC or more.
- any of the above glass plates is applicable in terms of heat resistance.
- preferable plastic plates include polyimide resin, fluororesin, polyamide resin, polyaramid resin, polyethersulfone resin, polyetherketone resin, polyetheretherketone resin, polyethylene naphthalate resin, various liquid crystal polymer resins, etc. Is exemplified.
- the substrate may be a laminate in which different materials are laminated, such as a glass plate, a silicon wafer, a metal plate, and a plastic plate.
- a laminate in which different types of substrates are laminated via a resin layer such as a laminate in which a glass plate, a resin layer, and a plastic plate are laminated in this order, or a laminate in which a glass plate, a plastic, and a glass plate are laminated in this order.
- substrate is mentioned. Furthermore, the laminated body etc. which use as a board
- the support substrate is a support glass substrate using a glass plate, but the present invention is not limited to this. From the viewpoint of industrial availability, glass plates, silicon wafers, metal plates, plastic plates and the like are preferable examples.
- a glass plate is employed as the support substrate, the thickness, shape, size, physical properties (thermal shrinkage, surface shape, chemical resistance, etc.), composition, etc. of the support glass substrate are not particularly limited.
- the thickness of the supporting glass substrate is not particularly limited, but it is necessary that the supporting glass substrate has a thickness that can be processed by the current production line. For example, the thickness is preferably 0.1 to 1.1 mm, more preferably 0.3 to 0.8 mm, and still more preferably 0.4 to 0.7 mm.
- the thickness of the supporting glass substrate and the resin layer Together with the thickness is 0.4 mm.
- the current production line is most commonly designed to process a glass substrate having a thickness of 0.7 mm.
- the resin layer The thickness is 0.3 mm.
- the thickness of the supporting glass substrate is preferably thicker than that of the thin glass substrate.
- the resin layer in the panel with a support of the present invention will be described.
- the resin layer is fixed to the first main surface of the support glass substrate. And although the resin layer is closely_contact
- peelability the property which can peel easily on the surface of a resin layer is called peelability.
- the resin layer and the first main surface of the thin glass substrate are not attached by the adhesive force that the adhesive has, the force due to van der Waals force between solid molecules, That is, it is preferable that it is attached by adhesion.
- the bonding force of the resin layer to the first main surface of the supporting glass substrate is relatively higher than the bonding force of the thin glass substrate to the first main surface.
- bonding with respect to the 1st main surface of a thin glass substrate is called close_contact
- bonding with respect to the 1st main surface of a support glass substrate is called fixation.
- the thickness of the resin layer is not particularly limited.
- the thickness is preferably 1 to 100 ⁇ m, more preferably 5 to 30 ⁇ m, and even more preferably 7 to 20 ⁇ m. This is because when the thickness of the resin layer is within such a range, the first main surface of the thin glass substrate and the resin layer are sufficiently adhered. Moreover, even if bubbles or foreign substances are present, it is possible to suppress the occurrence of distortion defects in the thin glass substrate. On the other hand, if the resin layer is too thick, it takes time and materials to form the resin layer, which is not economical.
- the resin layer may consist of two or more layers.
- the thickness of the resin layer means the total thickness of all the layers.
- the kind of resin which forms each layer may differ.
- the surface tension of the peelable surface of the resin layer with respect to the first main surface of the thin glass substrate is preferably 30 mN / m or less, more preferably 25 mN / m or less, and 22 mN / m or less. More preferably. This is because such surface tension can be more easily peeled off from the first main surface of the thin glass substrate, and at the same time, the close contact with the first main surface of the thin glass substrate becomes sufficient.
- a resin layer consists of a material whose glass transition point is lower than room temperature (about 25 degreeC) or does not have a glass transition point.
- the resin layer has heat resistance.
- the panel manufacturing method of the present invention for example, when a member for a display device is formed on the second main surface of the thin glass substrate, the glass laminate of the thin glass substrate, the resin layer, and the supporting glass substrate can be subjected to heat treatment. Because. Moreover, since the adhesiveness with the 1st main surface of a thin glass substrate will become low when the elasticity modulus of a resin layer is too high, it is unpreferable. Moreover, since an exfoliation property will become low when an elasticity modulus is too low, it is unpreferable.
- the type of resin forming the resin layer is not particularly limited.
- acrylic resin, polyolefin resin, polyurethane resin, and silicone resin can be used.
- Several types of resins can be mixed and used.
- silicone resins are preferred. This is because the silicone resin is excellent in heat resistance and preferably has a degree of peelability from the thin glass substrate.
- silicone resin layer is also preferable in that the peelability does not substantially deteriorate even when it is treated at, for example, about 300 to 400 ° C. for about 1 hour.
- the resin layer is preferably a cured product of curable silicone for release paper among silicone resins.
- the silicone for release paper is mainly composed of silicone containing linear dimethylpolysiloxane in the molecule.
- the resin layer formed by curing the composition containing the main agent and the crosslinking agent on the surface (first main surface) of the supporting glass substrate using a catalyst, a photopolymerization initiator or the like has excellent peelability. Therefore, it is preferable. Further, since the resin layer has high flexibility, even if foreign matter such as bubbles or dust is mixed between the thin glass substrate and the resin layer, the occurrence of distortion defects of the thin glass substrate can be suppressed.
- Such silicone for release paper is classified into a condensation reaction type silicone, an addition reaction type silicone, an ultraviolet curable type silicone, or an electron beam curable type silicone depending on the curing mechanism, and any of them can be used.
- addition reaction type silicone is preferable. This is because the curing reaction is easy, the degree of peelability is good when the resin layer is formed, and the heat resistance is also high.
- the silicone for release paper is classified into a solvent type, an emulsion type, and a solventless type, and any type can be used.
- a solventless type is preferable. This is because productivity, safety, and environmental characteristics are excellent.
- a solvent that causes foaming is not included at the time of curing when forming the resin layer, that is, at the time of heat curing, ultraviolet curing, or electron beam curing, bubbles are unlikely to remain in the resin layer.
- KNS-320A, KS-847, and TPR6700 are silicones that contain a main agent and a crosslinking agent in advance.
- the silicone resin forming the resin layer has a property that the components in the silicone resin do not easily migrate to the thin glass substrate, that is, low silicone migration.
- FIG. 1 is a schematic cross-sectional view showing one embodiment of the panel with a support of the present invention.
- the display device panel 16 includes a layered display device member 14 and a thin glass substrate 12, which are laminated.
- the display device member 14 is formed on the second main surface of the thin glass substrate 12.
- the 1st main surface of the thin glass substrate 12 and the surface of the resin layer 18 fixed to the 1st main surface of the support glass substrate 19 adhere closely, and the panel 10 with a support body of this invention is formed.
- the thin glass substrate 12, the resin layer 18, and the support glass substrate 19 have substantially the same size in the surface direction.
- FIG. 2 is a schematic front view showing another embodiment of the panel with a support of the present invention
- FIG. 3 is a cross-sectional view (schematic cross-sectional view) taken along line AA ′.
- the display device panel 26 includes a layered display device member 24 and a thin glass substrate 22, which are laminated.
- the display device member 24 is formed on the second main surface of the thin glass substrate 22.
- the 1st main surface of the thin glass substrate 22 and the resin layer 28 fixed to the 1st main surface of the support glass substrate 29 have adhered, and the panel 20 with a support body of this invention is formed.
- the panel 20 with a support of the present invention of the embodiment shown in FIGS. 2 and 3 has a major surface area of the support glass substrate 29 larger than that of the thin glass substrate 22, and the outer edge in the surface direction of the thin glass substrate 22 is support glass. It does not protrude from the outer edge of the substrate 29.
- the panel 20 with a support of the present invention has an area (hereinafter referred to as “surface” in the resin layer) of the surface of the resin layer 28 (surface contacting the first main surface of the thin glass substrate 22).
- the area of the first main surface of the thin glass substrate 22 is larger than the area.
- the surface area of the resin layer 28 is smaller than the area of the first main surface of the thin glass substrate 22 due to the formation of gaps 25 described later.
- a portion ⁇ of the first main surface of the thin glass substrate 22 that is not in contact with the resin layer 28 and a portion ⁇ of the supporting glass substrate 29 facing the end ⁇ of the support-equipped panel 20 of the present invention ( ⁇ 1, ⁇ 2). ) Is formed. It is preferable that such a gap portion 25 is formed because the thin glass substrate and the resin layer can be more easily peeled in the peeling step in the panel manufacturing method of the present invention described later.
- the depth of the gap portion 25 is preferably 1 mm or more, more preferably 3 mm or more, and further preferably 5 mm or more. Moreover, it is preferable that it is 15 mm or less, and it is more preferable that it is 10 mm or less. This is because the thin glass substrate and the resin layer can be more easily peeled in the peeling step in the panel manufacturing method of the present invention described later.
- the “depth of the gap” means the length from the end surface ( ⁇ 2) of the thin glass substrate to the end surface of the resin layer in the direction perpendicular to the end surface. In the case shown in FIGS. 2 and 3, it means the length of the portion indicated by ⁇ . As shown in FIG.
- the position of the gap portion 25 may be the central portion of one side of the rectangular thin glass substrate 22 as shown in FIG. 2, or all of one side of the rectangular thin glass substrate 22 as shown in FIG. Good. Further, one of the corners of the rectangular thin glass substrate 22 as shown in FIG. 5 may be a large corner cut. 4 and 5 are schematic front views showing still another aspect of the panel with a support according to the present invention.
- the panel with a support of the present invention supports both main surfaces of the display device member 34 with the thin glass substrates (32a, 32b) and the resin layers (38a, 38b).
- a mode of sandwiching with a laminated body with glass substrates (39a, 39b) may be employed. Even if it is such an aspect, it is a panel with a support body of this invention which can be processed with the panel manufacturing method of this invention.
- the manufacturing method of the panel with a support of this invention is demonstrated.
- the manufacturing method of the panel with a support body of this invention is not specifically limited,
- the resin layer formation process which forms the resin layer which has a peelable surface in the 1st main surface of the said support glass substrate,
- the said thin glass substrate, and the said support glass An adhesion process for laminating a substrate and bringing the peelable surface of the resin layer into close contact with the first main surface of the thin glass substrate; and a display device for forming a display device member on the second main surface of the thin glass substrate
- it is a manufacturing method of the panel with a support which comprises for a member formation process.
- the manufacturing method of the thin glass substrate and the supporting glass substrate in the manufacturing method of the panel with a support of the present invention is not particularly limited.
- it can be produced by a conventionally known method.
- it can be obtained by melting a conventionally known glass raw material to form a molten glass, and then forming it into a plate shape by a float method, a fusion method, a slot method, a redraw method or the like.
- the resin layer formation process in the manufacturing method of the panel with a support of this invention is demonstrated.
- the method for forming the resin layer on the surface (first main surface) of the supporting glass substrate is not particularly limited.
- a method of adhering a film-like resin to the surface of a supporting glass substrate can be mentioned.
- a method of performing a surface modification treatment to give a high adhesive force to the surface of the film and adhering to the first main surface of the supporting glass substrate can be mentioned.
- Treatment methods for surface modification include chemical methods (primer treatment) that chemically improve adhesion, such as silane coupling agents, and physical methods that increase surface active groups, such as flame (flame) treatment. Examples thereof include a mechanical method for increasing the catch by increasing the surface roughness, such as sandblasting.
- the method of coating the resin composition used as a resin layer on the 1st main surface of a support glass substrate by a well-known method for example is mentioned.
- Known methods include spray coating, die coating, spin coating, dip coating, roll coating, bar coating, screen printing, and gravure coating. From such a method, it can select suitably according to the kind of resin composition.
- a solventless release paper silicone is used as the resin composition
- a die coating method, a spin coating method or a screen printing method is preferred.
- Masking means that when a resin composition is coated, a removable film or the like is pasted on a portion where a gap is formed in advance so that the resin composition is not coated on that portion, and the film is peeled off later. Is the method.
- the coating amount is preferably 1 to 100 g / m 2 , and more preferably 5 to 20 g / m 2 .
- a resin layer is formed from an addition reaction type silicone, a resin composition containing a silicone (main agent) containing linear dimethylpolysiloxane in the molecule, a crosslinking agent and a catalyst
- the coating is performed on the first main surface of the supporting glass substrate by a known method such as the spray coating method, followed by heat curing.
- the heating and curing conditions vary depending on the blending amount of the catalyst.
- the reaction is preferably carried out at 100 ° C to 200 ° C. In this case, the reaction time is 5 to 60 minutes, preferably 10 to 30 minutes.
- the curing reaction In order to obtain a silicone resin layer having a low silicone migration property, it is preferable to allow the curing reaction to proceed as much as possible so that an unreacted silicone component does not remain in the silicone resin layer, but at such a reaction temperature and reaction time. When it exists, it is possible to prevent an unreacted silicone component from remaining in the silicone resin layer, which is preferable. If the reaction time is too long or the reaction temperature is too high, the silicone resin is simultaneously oxidized and decomposed to produce a low molecular weight silicone component, which may increase the silicone transferability. It is preferable to allow the curing reaction to proceed as much as possible so that an unreacted silicone component does not remain in the silicone resin layer in order to improve the peelability after the heat treatment.
- a thin glass substrate is laminated on the surface of the resin layer.
- the silicone resin layer is formed by heating and curing the silicone for release paper coated on the first main surface of the supporting glass substrate, and then the adhesion step
- the thin glass substrate is laminated on the silicone resin-formed surface of the supporting glass substrate.
- the release paper silicone By curing the release paper silicone with heat, the cured silicone resin is chemically bonded to the supporting glass substrate.
- the adhesion step includes laminating the first main surface of the thin glass substrate and the support glass substrate on which the resin layer is formed on the first main surface, and the resin layer on the first main surface of the thin glass substrate. It is the process of closely attaching the peelable surface.
- the first main surface of the thin glass substrate and the peelable surface of the resin layer are preferably bonded by a force caused by van der Waals force between the solid molecules facing each other, that is, an adhesion force. In this case, the supporting glass substrate and the thin glass substrate can be held in a laminated state.
- a method for laminating the thin glass substrate and the supporting glass substrate in which the resin layer is fixed to the first main surface is not particularly limited. For example, it can implement using a well-known method. For example, after laminating a thin glass substrate on the surface of the resin layer under a normal pressure environment, a method of pressure bonding the resin layer and the thin glass substrate using a roll or a press can be mentioned. It is preferable because the resin layer and the thin glass substrate are more closely adhered by pressure bonding with a roll or a press. Further, it is preferable because bubbles mixed between the resin layer and the thin glass substrate can be easily removed by pressure bonding with a roll or a press.
- the surface of the thin glass substrate is sufficiently washed and laminated in a clean environment. Even if a foreign substance is mixed between the resin layer and the thin glass substrate, the resin layer is not deformed and does not affect the flatness of the surface of the thin glass substrate. Since it becomes favorable, it is preferable.
- a display device member is formed on the main surface.
- an array or a color filter included in the LCD can be mentioned.
- a transparent electrode, a hole injection layer, a hole transport layer, a light emitting layer, and an electron transport layer included in the OLED can be given.
- the display device member forming step is a step of forming a display device member on the second main surface of the thin glass substrate of the thin glass laminate.
- a method of forming the display device member on the second main surface of the thin glass substrate of the thin glass laminate is not particularly limited, and may be the same as a conventionally known method.
- a process for forming an array on a conventionally known glass substrate, a process for forming a color filter, a glass substrate on which the array is formed, and a glass substrate on which the color filter is formed are used as a sealing agent.
- a process for forming an organic EL structure on the second main surface of a thin glass substrate a process of forming a transparent electrode, a hole injection layer, a hole transport layer, Various processes such as a process for depositing a light emitting layer / electron transport layer and the like, a sealing process, and the like are performed. Specifically, for example, a film forming process, a vapor deposition process, and an adhesion of a sealing plate are performed. Processing and the like.
- the panel with a support of the present invention can be produced.
- the panel manufacturing method of this invention is not specifically limited, In the panel for display apparatuses obtained through the peeling process which peels the support body which consists of the said support glass substrate and the said resin layer from the said panel with a support body, and this peeling process It is preferable that it is a panel manufacturing method which comprises the removal process of removing foreign materials, such as a transcription
- a peeling process is a process of peeling the support body which consists of the said support glass substrate and the said resin layer from the said panel for display apparatuses with a support body.
- the peeling method is a method capable of peeling without causing thermal, electromagnetic, mechanical and chemical damage to the thin glass substrate, the display device member formed on the second main surface, and the sealant.
- the supporting glass substrate is not damaged is preferable, and a method in which the resin layer having peelability fixed to the first main surface of the supporting glass substrate is not damaged is more preferable.
- a sharp blade-like object can be inserted into the interface between the thin glass substrate and the resin layer, or a mixed fluid of water and compressed air can be blown off.
- the panel with support is placed on the surface plate so that the supporting glass substrate side is on the upper side and the display device panel side is on the lower side, and the display device panel side substrate is vacuum-adsorbed on the surface plate (on both sides).
- the support glass substrate is laminated sequentially.
- a mixed fluid of water and compressed air is sprayed on the boundary between the thin glass substrate and the resin layer of the panel with support, and the end of the support glass substrate is Pull up vertically.
- an air layer is sequentially formed at the boundary, the air layer spreads over the entire boundary, and the support can be easily peeled off (support glass substrates are laminated on both main surfaces of the panel with the support). If it is, repeat the peeling step one side at a time).
- the support that has been peeled off by such a peeling step can be reused.
- the resin layer is a silicone resin layer
- the lower the silicone resin layer in the support after peeling the lower the silicone transferability, so that the poor peeling due to the increase in peel strength when the glass laminate is subjected to the heating step is suppressed. Tend to be. Therefore, it can be reused more preferably.
- the removal process in the panel manufacturing method of the present invention will be described.
- the removing step is a step of removing foreign matter attached to the first main surface of the thin glass substrate in the display device panel.
- a film with an adhesive such as a polarizing film or a retardation film on the first main surface (the surface in close contact with the resin layer) of the thin glass substrate in the display device panel obtained after being subjected to the peeling step. Even if affixed, the adhesive strength was weak and sometimes peeled off.
- the present inventor examined the cause of this, the transferred material derived from the resin layer on the first main surface, dust particles scattered in the air, and foreign matters such as metal pieces and machine oil resulting from the manufacturing process were very little. It was thought that the cause was attached. Then, the inventor removes the foreign matter without causing thermal, electromagnetic, mechanical and chemical damage to the thin glass substrate and the display device member formed on the second main surface of the thin glass substrate. I found a way to do it.
- the foreign matter is the first of the thin glass substrate including any substance derived from the resin layer (that is, a transfer product), dust particles scattered in the air, metal pieces or machine oil resulting from the manufacturing process, and the like. It means something other than a thin glass substrate attached to the main surface.
- the transferred material include compounds that form a resin layer, and those attached to the first main surface by being in close contact with the first main surface of the thin glass substrate. Further, for example, a low molecular compound that is a part of the substance forming the resin layer and is deposited on the surface of the resin layer can be used. The transferred material will be specifically described.
- the resin layer is made of silicone
- a comparison is made on the first main surface of the thin glass substrate due to the close contact between the first main surface of the thin glass substrate and the silicone resin layer fixed to the first main surface of the supporting glass substrate. It is considered that a low molecular weight silicone compound is attached by a diffusion effect in the resin layer.
- a glass laminated body passes through a heating process, it is difficult to remove a silicone compound from the 1st main surface of a thin glass substrate using the solvent etc. which can melt
- the substrate is not a thin glass substrate but a substrate made of a resin such as polyimide (hereinafter also referred to as a resin substrate)
- the resin substrate is peeled off from the support, and then a resin that can dissolve the silicone compound is used to The silicone compound adhering to the first main surface of the substrate can be removed.
- an acrylic adhesive is used in a polarizing film or the like, and is adjusted so as to obtain an appropriate adhesive strength to a hydrophilic glass substrate surface.
- a silicone compound that is water repellent adheres to the glass substrate surface, the adhesive strength of the acrylic adhesive to the glass substrate surface decreases and the rework property increases, but the polarizing plate peels off due to external force. There is.
- the factors that determine the adhesive strength of the polarizing film to the glass substrate surface include the hydrophilicity of the glass substrate surface, that is, the water contact angle, the elasticity of the film, the viscosity of the adhesive, etc. , And a 25 mm width polarizing film or a film with an adhesive attached to the glass substrate surface, and then measured by a method of peeling by 90 °.
- the method for removing the foreign matter attached to the first main surface of the substrate such as the thin glass substrate in the electronic device such as the display device panel is not particularly limited, but depends on the type of the resin layer or the substrate as described above. It is difficult to remove even if a solvent is used, and it is preferable to apply a method of thermally or chemically decomposing foreign matter.
- the resin layer is a silicone resin layer and the substrate is a thin glass substrate
- the foreign substance is considered to be mainly composed of a silicone compound
- the silicone compound attached to the first main surface of the thin glass substrate is silica
- Examples thereof include a method of thermally decomposing into water and carbon dioxide, and a method of chemically decomposing using acid or alkali.
- the resin layer is a silicone resin layer and the substrate is a resin substrate
- the silicone compound adhering to the resin substrate can be removed not only by thermal or chemical decomposition but also by dissolution with a solvent.
- the panel for display apparatuses used for a removal process is the aspect by which members for electronic devices, such as an array, an organic EL element, or a color filter, are formed on the 2nd main surface of a thin glass substrate, or two thin glass plates Since the substrate is bonded with a sealant and liquid crystal is injected between the two laminated thin glass substrates, it is necessary to remove the foreign matter without damaging them. That is, the removing step is preferably a step of removing the foreign matter without causing thermal, electromagnetic, mechanical, and chemical damage to the thin glass substrate, the display device member, and the sealant.
- the adhesive strength of the first main surface of the thin glass substrate before adhering the resin layer is f 0, and the first main surface of the thin glass substrate in the display device panel obtained after the removing step is adhered. It is preferable that f ⁇ f 0 when the strength is f. This can be realized by optimally performing the processes in the peeling step and the removing step.
- a plasma irradiation treatment is a preferred example.
- a method that has an electric field shield by a so-called remote plasma method and that does not have a thermal or electromagnetic influence on the display device panel is preferable.
- the atmospheric pressure remote plasma method is preferable compared to a method requiring high vacuum such as a plasma ashing method, and it is preferable because foreign matter can be removed at low cost.
- the adhesive strength of a film with an adhesive such as a polarizing plate on the first main surface of the thin glass substrate can be made equal to or higher than that before adhering to the resin layer.
- the number of times of plasma irradiation on the first main surface of the thin glass substrate is not particularly limited, and the plasma may be irradiated once or plural times as long as the first main surface of the thin glass substrate can obtain a desired adhesive strength.
- the surface temperature of the thin glass substrate at the time of plasma irradiation is preferably 100 ° C. or lower. The reason is that the display performance can be maintained without causing deterioration or damage to a member such as a sealant or a liquid crystal of the display device panel.
- FIG. 7 is a schematic diagram of a plasma discharge apparatus that can be used to remove the foreign matter by a remote plasma method in the removing step of the panel manufacturing method of the present invention.
- the voltage application electrode 42 and the ground electrode 43 are installed to face each other, and the surfaces facing the base material are each covered with a solid dielectric 46.
- the processing gas is introduced into the discharge space 44 formed by the voltage application electrode 42 and the ground electrode 43 in the direction of the arrow, is converted into plasma, and is blown out from the plasma blowing port 45 toward the display device panel 50.
- the conveyance speed of the display device panel 50 is preferably 0.1 to 5 m / min, more preferably 0.5 to 2 m / min, and preferably about 1 m / min.
- a method for removing foreign substances such as a silicone compound attached to the first main surface of the thin glass substrate in the display device panel it is preferable to remove the foreign substances using a chemical solution containing acid or alkali.
- a chemical solution containing acid or alkali is more preferable.
- butt dipping cleaning is preferable to shower cleaning because of contact with the liquid, and there is no particular effect on the sealant by selecting an appropriate concentration, temperature, and processing time.
- Foreign substances such as silicone compounds can be removed.
- a member that is preferably not in contact with the chemical solution in the display device member is preferably appropriately sealed or masked.
- the display device member has a liquid crystal injection hole, there is a possibility that a chemical solution may enter the display device, so that it is preferable to appropriately perform sealing or masking treatment.
- the display member and the sealant Corona discharge and flame can be mentioned within the range of treatment conditions that do not cause damage.
- the treatment conditions for example, the surface temperature of the thin glass substrate during corona discharge or flame treatment is preferably 100 ° C. or less. The reason is that the display performance can be maintained without causing deterioration or damage to a member such as a sealant or a liquid crystal of the display device panel.
- a foreign substance such as a silicone compound attached to the first main surface of the thin glass substrate, thermal, electromagnetic, mechanical or chemical to the thin glass substrate, the display device member and the sealant Foreign substances can be removed using a chemical solution containing a solvent having an sp value, that is, a solubility parameter of 7 to 15 (unit: cal 1/2 cm ⁇ 3/2 ) within a range of processing conditions that do not cause damage. preferable.
- a solubility parameter 7 to 15 (unit: cal 1/2 cm ⁇ 3/2 ) within a range of processing conditions that do not cause damage.
- the solubility parameter is outside the range of 7 to 15, since the affinity between the liquid and the resin layer is low, the liquid is difficult to get wet with the resin layer.
- a chemical solution containing methanol, ethanol, propanol, acetone, xylene, hexane, or the like it is preferable to use an alcohol-based cleaning liquid, for example, a cleaning liquid containing methanol, ethanol, propanol or the like.
- a cleaning liquid containing methanol, ethanol, propanol or the like By selecting an appropriate concentration, temperature, and treatment time for the cleaning liquid, it is possible to remove foreign substances such as a silicone compound attached to the substrate surface while suppressing damage to the sealing agent.
- the display device member that is preferably not in contact with the chemical solution is preferably appropriately sealed or masked.
- the display device panel has a liquid crystal injection hole, there is a risk that a chemical solution may enter the display device panel from the liquid crystal injection hole. Therefore, it is preferable to perform sealing or masking treatment on the liquid crystal injection hole.
- the panel manufacturing method of this invention it is preferable to have two or more such removal processes. That is, it is preferable that the foreign matter is removed by performing a single type of removing step a plurality of times, or the foreign matter is removed by combining a plurality of types of removing steps.
- the above-described method using plasma and a method using a chemical solution such as an acid may be combined to remove the foreign matter.
- the removing step it is preferable to further remove the foreign matter using ultrasonic vibration.
- a panel for a display device can be obtained by further subjecting it to a desired process.
- the desired process is a process of dividing a large cell having a plurality of cells into cells of a desired size, injecting liquid crystal into the divided cell, and then setting the injection port.
- the process of sealing, the process of sticking a polarizing plate to the cell with which the said inlet was sealed, and a module formation process are mentioned.
- a step of assembling a thin glass substrate on which an organic EL structure is formed and a counter substrate may be mentioned. Note that the step of dividing into cells of a desired size is preferably performed by a laser cutter because the strength of the thin glass substrate is not reduced by the cutting process and no cullet is produced.
- a thin glass substrate and a supporting glass substrate are prepared, and these surfaces are cleaned. Examples of cleaning include pure water cleaning and UV cleaning.
- a resin layer is formed on the first main surface of the supporting glass substrate.
- a silicone resin is coated on the first main surface of the supporting glass substrate using a screen printer. And it heat-hardens, forms a resin layer on the 1st main surface of a support glass substrate, and obtains the support glass substrate to which the resin layer was fixed.
- the peelable surface of the resin layer and the first main surface of the thin glass substrate are attached and bonded together.
- the resin layer and the thin glass substrate can be bonded together by vacuum pressing at room temperature.
- the thin glass laminated body which is a laminated body of a support glass substrate, a resin layer, and a thin glass substrate can be obtained.
- the second main surface of the thin glass substrate in the thin glass laminate may be polished or washed. Examples of cleaning include pure water cleaning and UV cleaning.
- the member for display apparatuses is formed in the 2nd main surface of the thin glass substrate in each thin glass laminated body.
- One thin glass laminate is subjected to a known color filter forming step to form a color filter on the second main surface of the thin glass substrate.
- Another thin glass laminated body forms an array in the 2nd main surface of the thin glass substrate by using for a well-known array formation process.
- Two panels with a support of the present invention can be manufactured by such a method.
- the panel with a support of the present invention having the color filter obtained here is also referred to as “panel x with support”
- the panel with a support of the present invention having an array is also referred to as “panel y with support”. .
- the panel x with support and the panel y with support manufactured as described above are further processed by, for example, the following methods 1 to 4 to manufacture a panel for a display device. To do.
- the two support bodies of panel z1 with a support body after sealing are used for the peeling process in the above-mentioned panel manufacturing method of this invention, and are peeled. And it uses for the removal process in the panel manufacturing method of this invention.
- the panel thus obtained is also referred to as “panel w1” below.
- the two separated substrates are reused for the production of another panel with a substrate.
- the panel w1 is cut into individual cells.
- liquid crystal is injected into the cut individual cell from the injection hole, and then the injection hole is sealed to form a liquid crystal cell.
- the removing step in the panel manufacturing method of the present invention may be performed after the support is peeled from the panel with the support or after the individual cells are cut and the liquid crystal cells are formed.
- a liquid crystal cell is manufactured using a conventionally known liquid crystal dropping method (ODF). Liquid crystal is suspended on either the color filter forming surface or the array forming surface in each of the panel with support x and the panel with support y, and the other formation surface is opposed to the surface on which the liquid crystal is suspended, Bonding is performed using a sealant such as an ultraviolet curable sealant for cell formation.
- the panel with support of the present invention obtained here is also referred to as “panel with support z2” below.
- the two support bodies of the support-equipped panel z2 are subjected to a peeling step in the above-described panel manufacturing method of the present invention and peeled off. And it uses for the removal process in the panel manufacturing method of this invention.
- the panel thus obtained is also referred to as “panel w2” below.
- the two separated substrates are reused for the production of another panel with a substrate.
- the panel w2 is cut into individual cells.
- a polarizing plate is attached to the panel w2 cut into individual cells, and a backlight or the like is formed, whereby the LCD 2 can be obtained.
- the removal step of the present invention in this case may be either after the support glass substrate is peeled off or after the cells are individually cut and the liquid crystal cell is formed.
- a liquid crystal cell is manufactured using ODF. Liquid crystal is suspended on either the color filter forming surface or the array forming surface in each of the panel with support x and the panel with support y, and the other formation surface is opposed to the surface on which the liquid crystal is suspended, Bonding is performed using a sealant such as an ultraviolet curable sealant for cell formation.
- the bonded panel x with support and panel y with support are cut into individual cells together with the support.
- the panel with support of the present invention obtained by cutting here is also referred to as “panel with support z3” below.
- two support bodies of the panel z3 with a support body are peeled in the peeling process in the above-mentioned panel manufacturing method of this invention.
- the panel thus obtained is also referred to as “panel w3” below.
- LCD3 can be obtained by attaching a polarizing plate to the panel w3 and forming a backlight or the like.
- the two support bodies of the support-equipped panel z4 are subjected to a peeling step in the above-described panel manufacturing method of the present invention and peeled off. And it uses for the removal process in the panel manufacturing method of this invention.
- the panel thus obtained is also referred to as “panel w4” below.
- the liquid crystal injection hole of the panel w4 After removing the temporary sealing of the liquid crystal injection hole of the panel w4, the liquid crystal is injected into the cell of the panel w4 and then sealed.
- an LCD 4 can be obtained by attaching a polarizing plate and forming a backlight and the like.
- the thin glass substrate when the thin glass substrate is large, for example, even if it is 730 ⁇ 920 mm, the thin glass substrate can be easily peeled off.
- the manufacturing method of the display device of the present invention is a manufacturing method including the panel manufacturing method of the present invention. After obtaining the panel for display devices by the panel manufacturing method of the present invention, the display device can be obtained by subjecting the panel to further known processes.
- the method for manufacturing a display device of the present invention is suitable for manufacturing a small display device used for a mobile terminal such as a mobile phone or a PDA.
- the display device is mainly an LCD or an OLED, and the LCD includes a TN type, STN type, FE type, TFT type, MIM type, IPS type, VA type, and the like.
- the present invention can be applied to both passive drive type and active drive type display devices.
- the display device panel having the display device member on the surface (second main surface) of the substrate has been described as a representative example of the electronic device of the present invention.
- the present invention is not limited to this.
- the solar cell having the surface (second main surface) of the substrate, the member for a solar cell, the member for a thin film secondary battery, and the member for an electronic device such as an electronic component circuit, the thin film 2 Of course, it may be an electronic device such as a secondary battery or an electronic component.
- a transparent electrode such as positive electrode tin oxide, a silicon layer represented by p layer / i layer / n layer, a metal of the negative electrode, and the like can be cited.
- a transparent electrode such as a metal or a metal oxide of a positive electrode and a negative electrode, a lithium compound of an electrolyte layer, a metal of a current collecting layer, a resin as a sealing layer, etc.
- various members corresponding to nickel hydrogen type, polymer type, ceramic electrolyte type and the like can be mentioned.
- a circuit for an electronic component in a CCD or CMOS, a metal of a conductive part, a silicon oxide or a silicon nitride of an insulating part, and the like, various sensors such as a pressure sensor and an acceleration sensor, a rigid printed board, a flexible printed board And various members corresponding to a rigid flexible printed circuit board.
- the thin glass substrate (Asahi Glass Co., Ltd., AN100, non-alkali glass) having a length of 720 mm, a width of 600 mm, a thickness of 0.3 mm, and a linear expansion coefficient of 38 ⁇ 10 ⁇ 7 / ° C. is contacted with the silicone resin layer.
- the silicone resin layer and the thin glass substrate are bonded together by a vacuum press at room temperature to form a thin glass laminate (hereinafter also referred to as “thin glass laminate A1”). Obtained.
- the formation of the resin layer and the lamination of the thin glass substrates were performed so that a gap portion having a depth of 15 mm was formed at the end of the thin glass laminate A1.
- both glass substrates were in close contact with the silicone resin layer without generating bubbles, and there was no distortion defect and smoothness was good.
- the thin glass laminate A1 was heat-treated at 250 ° C. for 2 hours in the air.
- the resin layer of the thin glass laminate A1 was not deteriorated by heat, and it was confirmed that the heat resistance was good.
- the second main surface of the thin glass substrate in the thin glass laminate A1 was fixed on a fixed base. Moreover, it adsorb
- the thin glass substrate obtained by peeling is also referred to as “thin glass substrate a1”.
- a polarizing film manufactured by Nitto Denko Corporation, acrylic adhesive
- the measuring method is 90 ° peeling at the end of the film after a polarizing film having a width of 25 mm or a film with an adhesive is pasted on the glass substrate surface.
- the adhesive strength was 0.20 N / 25 mm.
- the first main surface of the thin glass substrate a1 was irradiated with plasma using an atmospheric pressure remote plasma apparatus (manufactured by Sekisui Chemical Co., Ltd.).
- the surface temperature of the thin glass substrate a at the time of plasma irradiation was 50 ° C. or less.
- the same polarizing film as before the plasma irradiation was attached to the first main surface of the thin glass substrate a1 after the plasma irradiation, and the adhesive strength of the polarizing film was measured by the same method.
- the adhesive strength was 4.7 N / 25 mm after 90 ° peeling.
- the adhesive strength in the 1st main surface of the thin glass substrate before forming thin glass laminated body A1 was 3.9 N / 25mm.
- Example 1b On the first main surface of the supporting glass substrate, linear polyorganosiloxane having a vinyl group at both ends (trade name “8500”, manufactured by Arakawa Chemical Industries, Ltd.) and methylhydro having a hydrosilyl group in the molecule Example 1a, except that a mixture of Genpolysiloxane (Arakawa Chemical Industries, trade name “12031”) and a platinum-based catalyst (Arakawa Chemical Industries, trade name “CAT12070”) was used. After obtaining a thin glass laminate (hereinafter also referred to as “thin glass laminate A2”) by the above method, heat treatment was performed in the atmosphere.
- the thin glass substrate and the support were peeled off in the same manner as in Example 1a.
- the thin glass substrate obtained by peeling is also referred to as “thin glass substrate a2”.
- the polarizing film is once peeled off, and the thin glass substrate a2 is immersed in a resist stripping solution (manufactured by Parker Corporation, containing 20% by mass of potassium hydroxide as a main component) for 10 minutes at 50 ° C. Then, washing with water and air blowing were performed.
- a resist stripping solution manufactured by Parker Corporation, containing 20% by mass of potassium hydroxide as a main component
- Example 1c After obtaining a thin glass laminate (hereinafter also referred to as “thin glass laminate A3”) in the same manner as in Example 1b, heat treatment was performed in the air. Next, the thin glass substrate and the support (support glass substrate having a resin layer) were peeled off in the same manner as in Example 1b. The thin glass substrate obtained by peeling is also referred to as “thin glass substrate a3”. Next, the thin glass substrate a3 was immersed in a resist stripping solution. Here, the temperature of the stripping solution was 50 ° C., and immersion was performed for 5 minutes. In addition, ultrasonic vibration was applied to the thin glass substrate a3 using an ultrasonic vibration plate installed in the liquid tank. Next, as a result of measuring the adhesive strength of the polarizing film on the first main surface of the thin glass substrate a3, it was 4.0 N / 25 mm.
- Example 1d After a thin glass laminate (hereinafter also referred to as “thin glass laminate A4”) was obtained in the same manner as in Example 1b, heat treatment was performed in the air. Next, the thin glass substrate and the support (support glass substrate having a resin layer) were peeled off in the same manner as in Example 1b. The thin glass substrate obtained by peeling is also referred to as “thin glass substrate a4”. Next, on the first main surface of the thin glass substrate a4, the surface temperature of the thin glass substrate is changed by a frame processing machine (manufactured by Alcotech) at the edge of the oxygen burner flame four times at a scanning speed of 10 m / min. The treatment was performed under conditions of 100 ° C. or lower. Next, the result of measuring the adhesive strength of the polarizing film on the first main surface of the thin glass substrate a4 was 4.0 N / 25 mm.
- a frame processing machine manufactured by Alcotech
- Example 1e In Example 1e, except that the thin glass substrate was changed to a polyimide resin substrate having a thickness of 0.05 mm (manufactured by Toray DuPont, Kapton 200HV), a device substrate laminate (hereinafter, “ Device substrate laminate A5 ”) was also obtained.
- a surface that is in close contact with the peelable surface of the resin layer is a first main surface
- a main surface that forms the electronic device member is a second main surface.
- the heat resistance of the resin layer of the device substrate laminate A5 was evaluated by the same method as in Example 1a, it was confirmed that there was no deterioration due to heat and the heat resistance was good.
- polyimide resin substrate a5 The polyimide resin substrate obtained by peeling is also referred to as “polyimide resin substrate a5”.
- a polarizing film was attached to the first main surface of the polyimide resin substrate a5 in the same manner as in Example 1a in the same manner as in Example 1a.
- the adhesive strength of the polarizing film in the 1st main surface of the polyimide resin substrate a5 was measured.
- the adhesive strength of the polarizing film was 0.50 N / 25 mm.
- plasma was irradiated to the 1st main surface of the polyimide resin board
- substrate laminated body A5 for devices was 1.5 N / 25mm.
- Example 1f In Example 1f, except that the thin glass substrate was changed to a stainless steel (SUS304) substrate having a mirror finish of 0.1 mm in thickness, a device substrate laminate (hereinafter “device substrate” was used in the same manner as in Example 1a. Also referred to as “laminate A6”). Of the two main surfaces of the stainless steel substrate, the surface that is in close contact with the peelable surface of the resin layer is the first main surface, and the main surface that forms the electronic device member is the second main surface. The heat resistance of the resin layer of the device substrate laminate A6 was evaluated in the same manner as in Example 1a, but it was confirmed that the heat resistance was good and there was no deterioration due to heat.
- Example 1a The stainless steel substrate obtained by peeling is also referred to as “stainless steel substrate a6”.
- a polarizing film was attached to the first main surface of the stainless steel substrate a6 in the same manner as in Example 1a in the same manner as in Example 1a. And the adhesive strength of the polarizing film in the 1st main surface of the stainless steel substrate a6 was measured. The adhesive strength of the polarizing film was 0.40 N / 25 mm.
- Example 1g First, a glass film (Asahi Glass Co., Ltd., AN100, non-alkali glass) having a length of 350 mm, a width of 300 mm, a plate thickness of 0.08 mm, and a linear expansion coefficient of 38 ⁇ 10 ⁇ 7 / ° C. was washed with an alkaline detergent, The film surface was cleaned. Further, a 0.1% methanol solution of ⁇ -mercaptopropyltrimethoxysilane was sprayed on the surface of the glass film and dried at 80 ° C. for 3 minutes.
- a glass film Asahi Glass Co., Ltd., AN100, non-alkali glass
- the surface of a polyimide resin substrate (manufactured by Toray DuPont, Kapton 200HV) having a length of 350 mm, a width of 300 mm, and a thickness of 0.05 mm was plasma-treated. Then, a glass / resin laminated substrate was formed using a press apparatus in which a glass film and a polyimide resin substrate were superposed and heated to 320 ° C. Of the two main surfaces of the glass / resin laminated substrate, the main surface on the polyimide resin substrate side that is in close contact with the peelable surface of the resin layer is the first main surface, and the main surface on the opposite glass film side is the second main surface. .
- Example 1g a device substrate laminate (hereinafter also referred to as “device substrate laminate A7”) was obtained in the same manner as in Example 1a, except that the thin glass substrate was changed to the glass / resin laminate substrate. .
- the heat resistance of the resin layer of the device substrate laminate A7 was evaluated in the same manner as in Example 1a, but it was confirmed that the heat resistance was good and there was no deterioration due to heat.
- the glass / resin laminated substrate and the support (supporting glass substrate having a resin layer) were peeled off in the same manner as in Example 1a.
- the glass / resin laminated substrate obtained by peeling is also referred to as “glass / resin laminated substrate a7”.
- the polarizing film was stuck on the 1st main surface of the glass / resin laminated substrate a7 by the method similar to Example 1a by the method similar to Example 1a. And the adhesive strength of the polarizing film in the 1st main surface of glass / resin laminated substrate a7 was measured. The adhesive strength of the polarizing film was 0.40 N / 25 mm. Next, plasma was irradiated to the 1st main surface of the glass / resin laminated substrate a7 by the method similar to Example 1a using a normal pressure remote plasma apparatus, and the polarizing film was stuck.
- Example 1h In Example 1h, a device substrate laminate A51 was obtained in the same manner as in Example 1e. Next, the polyimide resin substrate and the support (support glass substrate having a resin layer) were peeled off in the same manner as in Example 1e. Next, a polarizing film was attached to the first main surface of the polyimide resin substrate in the device substrate laminate A51 in the same manner as in Example 1a in the same manner as in Example 1a. And the adhesive strength of the polarizing film in the 1st main surface of a polyimide resin substrate was measured. The adhesive strength of the polarizing film was 0.40 N / 25 mm.
- Example 2 First, a supporting glass substrate (Asahi Glass Co., Ltd., AN100, non-alkali glass) having a length of 720 mm, a width of 600 mm, a thickness of 0.6 mm, and a linear expansion coefficient of 38 ⁇ 10 ⁇ 7 / ° C. is cleaned with pure water and UV cleaning. Turned into.
- a supporting glass substrate Asahi Glass Co., Ltd., AN100, non-alkali glass
- linear polyorganosiloxane having vinyl groups at both ends (trade name “8500”, manufactured by Arakawa Chemical Industries, Ltd.), and hydrosilyl group in the molecule
- a mixture of methylhydrogenpolysiloxane (trade name “12031” manufactured by Arakawa Chemical Industries, Ltd.) and a platinum-based catalyst (trade name “CAT12070” manufactured by Arakawa Chemical Industries, Ltd.) is 705 mm long and 595 mm wide. The size was applied by a screen printing machine (coating amount 20 g / m 2 ).
- the mixing ratio of the linear polyorganosiloxane and the methylhydrogen polysiloxane was adjusted so that the molar ratio of hydrosilyl group to vinyl group was 1/1.
- the platinum catalyst was 5 parts by mass with respect to 100 parts by mass in total of the linear polyorganosiloxane and methyl hydrogen polysiloxane.
- this was heat-cured at 180 ° C. for 30 minutes in the air to form a 20 ⁇ m thick silicone resin layer on the first main surface of the supporting glass substrate.
- the thin glass substrate (Asahi Glass Co., Ltd., AN100, non-alkali glass) having a length of 720 mm, a width of 600 mm, a thickness of 0.1 mm, and a linear expansion coefficient of 50 ⁇ 10 ⁇ 7 / ° C. is contacted with the silicone resin layer.
- the silicone resin layer and the thin glass substrate are bonded together by a vacuum press at room temperature to form a thin glass laminate (hereinafter also referred to as “thin glass laminate B”). Obtained.
- the formation of the resin layer and the lamination of the thin glass substrates were performed so that a gap portion having a depth of 15 mm was formed at the end of the thin glass laminate B.
- both glass substrates were in close contact with the silicone resin layer without generating bubbles, and there was no distortion defect and smoothness was good.
- thin glass laminate B1 an array is formed on the second main surface of the thin glass substrate of one thin glass laminate B (referred to as “thin glass laminate B1”).
- the insulating layer and the amorphous silicon layer are formed by a CVD method, the electrode layer is formed by a sputtering method, and each patterning is performed by a method called photolithography.
- a color filter is formed on the second main surface of the thin glass substrate of the other thin glass laminate B (referred to as “thin glass laminate B2”).
- a black matrix and RGB pixels are formed by a coating and baking method, an electrode layer is formed by a sputtering method, and each color pattern is formed by a method called photolithography.
- the array formation surface in thin glass laminated body B1 and the color filter formation surface in thin glass laminated body B2 are made to oppose, and it bonds together using the ultraviolet curing sealing agent for cell formation, and is a panel for display apparatuses with a support body. (Hereinafter also referred to as “panel C with support”).
- the second main surface of the supporting glass substrate which was a part of the thin glass laminate B1 in the panel C with the supporting body, is fixed on the fixing base. Moreover, the 2nd main surface of the support glass substrate which was a part of thin glass laminated body B2 in the panel C with a support body is adsorb
- the panel C with a support body Comprising: At the interface of the thin glass substrate which was a part of thin glass laminated body B2, and a resin layer, thickness 0.1mm The knife glass is inserted, the thin glass substrate and the support (support glass substrate having the resin layer) are slightly peeled off, and then the suction pad is moved away from the fixing base, so that the first main surface of the thin glass substrate And the support are peeled off. What was obtained by peeling the support of the thin glass laminate B2 from the panel C with support is also referred to as “panel Cx with support”.
- the first main surface of the thin glass substrate that was a part of the thin glass laminate B2 in the support-equipped panel Cx is fixed on a fixed base.
- the 2nd main surface of the support glass substrate which was a part of thin glass laminated body B1 in the panel Cx with a support body is adsorb
- a polarizing film manufactured by Nitto Denko Corporation, acrylic adhesive
- the adhesive strength of the said polarizing film was measured.
- the measuring method is the same as in Example 1a. As a result, the adhesive strength becomes 0.78 N / 25 mm and 0.59 N / 25 mm at 90 ° peeling.
- the film is once peeled off, and the panel C is cut to obtain 168 cells of 51 mm long ⁇ 38 mm wide. Then, liquid crystal injection and injection hole sealing are performed on each, thereby forming a liquid crystal cell. Thereafter, the liquid crystal cell is immersed in a resist stripping solution (manufactured by Parker Corporation, containing 20% by mass of potassium hydroxide as a main component) at 20 ° C. for 10 minutes, washed with water and air blown. Thereafter, the first main surface of the thin glass substrate on which the array of liquid crystal cells is formed is fixed on the fixing base, and the first main surface of the thin glass substrate on which the color filter is formed is adsorbed by the suction pad, and from the fixing base. When pulled away at 20 N / 25 mm, there is no peeling of the sealant and destruction of the cell.
- a resist stripping solution manufactured by Parker Corporation, containing 20% by mass of potassium hydroxide as a main component
- the same polarizing film as that before immersing in the resist stripping solution is applied to the first main surface of the thin glass substrate in the liquid crystal cell after being immersed in the resist stripping solution, and the adhesive strength of the polarizing film is measured by the same method. .
- the adhesive strength is 4.4 N / 25 mm after 90 ° peeling.
- an LCD can be obtained by performing a module forming process.
- the LCD obtained in this way does not suffer from characteristic problems, that is, deterioration of array performance or color filter chromaticity.
- a liquid crystal display device having a total thickness of about 0.2 mm between the outer surfaces of the two opposing thin glass substrates of the LCD can be obtained.
- Example 3 A thin glass laminate B formed in Example 2 and a non-alkali glass substrate having a thickness of 0.7 mm (Asahi Glass Co., Ltd., AN100, non-alkali glass) were prepared (the thin glass laminate B used here) “Thin glass laminate B3”). And the color filter was formed in the 2nd main surface of the thin glass substrate of thin glass laminated body B3 by the method similar to Example 2, and the array was formed in one main surface of an alkali free glass substrate.
- Example 2 the array-forming surface of the alkali-free glass substrate and the color filter forming surface of the thin glass laminate B3 are opposed to each other, liquid crystal is sealed, and an ultraviolet curable sealing agent for cell formation is added.
- a panel for a display device with a support hereinafter also referred to as “panel D with a support”.
- the liquid crystal injection hole is sealed.
- the support of the thin glass laminate B3 can be peeled by the same method as in Example 2. What was obtained here, ie, what was obtained by peeling a support body from panel D with a support body, is set as "panel D.”
- Example 2 After the panel D is cut and 168 cells are obtained in the same manner as in Example 2, a liquid crystal cell is formed. Then, the obtained liquid crystal cell is immersed in the same resist stripping solution as in Example 2. Here, the temperature of the stripping solution is 50 ° C., and the immersion is performed for 5 minutes. In addition, ultrasonic vibration is applied to the liquid crystal cell using an ultrasonic vibration plate installed in the liquid tank.
- a polarizing film is attached to the first main surface of the thin glass substrate of the liquid crystal cell after being immersed in the resist stripping solution, and the adhesive strength of the polarizing film is measured.
- the type of polarizing film used and the method for measuring the adhesive strength are the same as in Example 1. As a result, the adhesive strength is 4.3 N / 25 mm after 90 ° peeling.
- an LCD can be obtained by performing a module forming process.
- the LCD obtained in this way does not suffer from characteristic problems, that is, deterioration of array performance or color filter chromaticity.
- a liquid crystal display device having a total thickness of about 0.8 mm between the outer surfaces of the two opposing thin glass substrates of the LCD can be obtained.
- Example 4 Two thin glass laminates B formed in Example 2 are prepared. Then, an array is formed on the second main surface of the thin glass substrate of one thin glass laminate B (referred to as “thin glass laminate B4”) in the same manner as in Example 2. Further, an organic EL structure is formed on the second main surface of the thin glass substrate of the other thin glass laminate B (referred to as “thin glass laminate B5”). Specifically, a step of forming a transparent electrode, a step of forming an auxiliary electrode, a step of depositing a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and the like, and a step of sealing them, An organic EL structure is formed on the thin glass substrate of the thin glass laminate B5.
- a panel E with a support is obtained by combining the thin glass laminate B4 and the thin glass laminate B5.
- the support of the thin glass laminate B4 and the thin glass laminate B5 can be peeled by the same method as in Example 2.
- the product obtained here that is, the product obtained by peeling the support from the support-equipped panel E is referred to as “panel E”.
- panel E On the surface of the thin glass substrate in panel E, there is no damage that leads to a decrease in strength.
- the first main surface of the thin glass substrate on which the organic EL structure is formed is irradiated with plasma using an atmospheric pressure remote plasma apparatus (manufactured by Sekisui Chemical Co., Ltd.).
- the surface temperature of the thin glass substrate at the time of plasma irradiation is 50 ° C. or less.
- the panel E was cut using a laser cutter or a scribe-break method, and divided into 288 cells of 41 mm in length and 30 mm in width, and then a PET film (manufactured by Nitto Denko Corporation, acrylic as a protective film) on the cell surface. Adhesive). The adhesive strength at that time is 3.9 N / 25 mm. Then, a module formation process is implemented and OLED is produced. The OLED obtained in this way does not have a problem in characteristics.
- the support is peeled off before being divided into display panel units. However, a structure in which a plurality of panels are connected to each other can be processed as a unit. In addition to the above example, the support can be peeled off after being divided into display panel units.
- the substrate for the electronic device without causing thermal, electromagnetic, mechanical and chemical damage to the substrate and the member for the electronic device (for example, thin film transistor, organic EL element, color filter)
- the member for the electronic device for example, thin film transistor, organic EL element, color filter
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Abstract
Description
同様に、太陽電池、薄膜2次電池、表面に回路が形成された半導体ウェハなどの電子デバイスも軽量化、薄型化が求められている。
これらの要求に対応するため、表示装置など電子デバイスに用いるガラス、樹脂、金属などの基板の薄板化が進んでいる。
ガラス基板の場合、板厚を薄くする方法としては、一般に、表示装置用部材をガラス基板の表面に形成し、表示装置用パネルを形成した後に、化学エッチングを用いて表示装置用パネルの両外側表面をエッチング処理し、表示装置用パネルの厚さを薄くする方法が用いられている。
また、上記の化学エッチングによる基板薄化法においては、表示装置用部材をガラス基板の表面に形成した後に化学エッチング処理等をしてガラス基板を薄くするので、ガラス基板の表面に形成された微細な傷が顕在化する問題、すなわちエッチピットの発生という問題が生じることがある。
また、特許文献2には、液晶表示装置の基板と支持体との端部をガラスフリット系の接着剤を用いて接着して、その後、電極パターン等を形成する液晶表示装置の製造方法が記載されている。
特許文献3には、2枚のガラス基板の少なくとも周縁部の端面近傍にレーザ光を照射して前記2枚のガラス基板を融合させる工程を有する表示装置用基板の製造方法が記載されている。
特許文献5には、液晶表示素子用電極基板を紫外線硬化型粘着剤が支持体上に設けられた治具を用いて、液晶表示素子用電極基板に所定の加工を施した後、紫外線硬化型粘着剤に紫外線を照射することにより、前記紫外線硬化型粘着剤の粘着力を低下させ、前記液晶表示素子用電極基板を前記治具から剥離することを特徴とする液晶表示素子の製造方法が記載されている。
特許文献6には、粘着剤によって薄板を支持板に仮固定し、前記粘着剤の周縁部をシール剤によって封止し、薄板を仮固定した支持板を搬送する搬送方法が記載されている。
また、特許文献8には、シリコーンを用いた半導体製造用の両面密着シートが記載されている。
本発明は以下の(1)~(8)に関する。
本発明の電子デバイス製造方法(以下「本発明の電子デバイス製造方法」ともいう)は、第1主面および第2主面を有し第2主面に電子デバイス用部材を有する基板の第1主面に、第1主面および第2主面を有する支持基板の第1主面に固定された剥離性表面を有する樹脂層が密着している支持体付き電子デバイスから、前記支持基板および前記樹脂層からなる支持体を剥離し、前記電子デバイス用部材および前記基板を含む電子デバイスを得る剥離工程と、前記電子デバイスにおける前記基板の第1主面に付いた、異物を除去する除去工程とを具備する、電子デバイスの製造方法である。
すなわち、支持体付き電子デバイスは、電子デバイス用部材、基板、樹脂層および支持基板を有し、これらはこの順に積層されている。また、電子デバイスは電子デバイス用部材および基板を有し、電子デバイス用部材は基板の第2主面上に形成されている。
また、支持体付き電子デバイスは、基板、樹脂層および支持基板がこの順に積層された積層体が電子デバイス用部材を介して2つ積層されたもの、すなわち、支持基板、樹脂層、基板、電子デバイス用部材、基板、樹脂層および支持基板がこの順に積層されたものであってもよい。
ここで、電子デバイスとは、表示装置用パネル、太陽電池、薄膜2次電池、表面に回路が形成された半導体ウェハ等の電子部品をいう。表示装置用パネルとは、液晶パネル、有機ELパネル、プラズマディスプレイパネル、フィールドエミッションパネル等を含んでいる。
以下、本発明における電子デバイスの一つとして、基板および支持基板がガラスからなる表示装置用パネルについて詳述する。以下では、表示装置用パネルの製造方法を「本発明のパネル製造方法」と呼び、支持体付き表示装置用パネルを「本発明の支持体付きパネル」と呼ぶ。
薄板ガラス基板は、その厚さ、形状、大きさ、物性(熱収縮率、表面形状、耐薬品性等)、組成等は特に限定されず、例えば従来のLCD、OLED等の表示装置用のガラス基板と同様であってよい。
このような厚さおよび大きさであっても、本発明においては、薄板ガラス基板と支持体とを容易に剥離することができる。
熱収縮率は小さいことが好ましい。具体的には熱収縮率の指標である線膨張係数が500×10-7/℃以下であることが好ましく、300×10-7/℃以下であることがより好ましく、200×10-7/℃以下であることがより好ましく、100×10-7/℃以下であることがより好ましく、45×10-7/℃以下であることがさらに好ましい。
なお、本発明において線膨張係数はJIS R3102(1995年)に規定のものを意味する。
表示装置用部材とは、従来のLCD、OLED等の表示装置用のガラス基板がその表面上に有する発光層、保護層、TFTアレイ(以下、アレイという。)、カラーフィルタ、液晶、ITOからなる透明電極等、各種回路パターン等を意味する。前記薄板ガラス基板の第2主面上の表示装置用部材の種類は特に限定されない。
このような表示装置用部材と前記薄板ガラス基板とから、表示装置用パネルがなる。
本発明の支持体付きパネルは、前記薄板ガラス基板の第1主面に、支持体として、樹脂層が固定された支持ガラス基板を有する。支持ガラス基板は樹脂層を介して薄板ガラス基板と密着して、薄板ガラス基板の強度を補強する。
支持ガラス基板の厚さは特に限定されないが、本発明の支持体付きパネルが現行の製造ラインで処理できるような厚さであることが必要である。
例えば0.1~1.1mmの厚さであることが好ましく、0.3~0.8mmであることがより好ましく、0.4~0.7mmであることがさらに好ましい。
例えば、現行の製造ラインが厚さ0.5mmの基板を処理するように設計されたものであって、薄板ガラス基板の厚さが0.1mmである場合、支持ガラス基板の厚さと樹脂層の厚さとあわせて0.4mmである。また、現行の製造ラインは厚さが0.7mmのガラス基板を処理するように設計されているものが最も一般的であるが、例えば薄板ガラス基板の厚さが0.4mmならば、樹脂層の厚さとあわせて0.3mmとする。
支持ガラス基板の厚さと前記薄板ガラス基板との相対的な厚さの関係は限定されず、支持ガラス基板の厚さが薄板ガラス基板の厚さよりも厚くてもよく、支持ガラス基板の厚さが薄板ガラス基板の厚さよりも薄くてもよい。
薄板ガラス基板と支持ガラス基板との線膨張係数の差は300×10-7/℃以下であることが好ましく、100×10-7/℃以下であることがより好ましく、50×10-7/℃以下であることがさらに好ましい。
基板として板厚が薄いガラス板(薄板ガラス基板)を採用する場合、薄板ガラス基板の組成は、例えばアルカリガラスや無アルカリガラスと同様であってよい。中でも、熱収縮率が小さいことから無アルカリガラスであることが好ましい。
基板としてプラスチック板を採用する場合、その種類は特に制限されず、例えば、透明な基板の場合、ポリエチレンテレフタレート樹脂、ポリカーボネート樹脂、ポリエーテルスルホン樹脂、ポリエチレンナフタレート樹脂、ポリアクリル樹脂、ポリシリコーン樹脂、透明フッ素樹脂などが例示される。不透明な基板の場合、ポリイミド樹脂、フッ素樹脂、ポリアミド樹脂、ポリアラミド樹脂、ポリエーテルケトン樹脂、ポリエーテルエーテルケトン樹脂、各種液晶ポリマー樹脂などが例示される。
基板として金属板を採用する場合、その種類は特に制限されず、例えば、ステンレス鋼板、銅板等が例示される。
基板の耐熱性は特に制限されないが、表示装置用部材のTFTアレイなどを形成する場合は耐熱性が高いことが好ましい。具体的には上記5%加熱重量減温度が300℃以上であることが好ましい。更に350℃以上であることがより好ましい。
この場合、耐熱性の点では上記したガラス板はどれも当てはまる。
耐熱性の観点より、好ましいプラスチック板としては、ポリイミド樹脂、フッ素樹脂、ポリアミド樹脂、ポリアラミド樹脂、ポリエーテルスルホン樹脂、ポリエーテルケトン樹脂、ポリエーテルエーテルケトン樹脂、ポリエチレンナフタレート樹脂、各種液晶ポリマー樹脂等が例示される。
また、基板は、ガラス板、シリコンウェハ、金属板、プラスチック板等、異なる材質を積層した積層体であってもよい。例えば、ガラス板、樹脂層、プラスチック板の順に積層した積層体のように、異なる種類の基板を、樹脂層を介して積層する積層体、あるいは、ガラス板、プラスチック、ガラス板の順に積層したものを基板として使用するように、異なる種類の板で複層化したものを基板として使用する積層体が挙げられる。
さらに、2枚以上のガラス板同士、あるいは2枚以上のプラスチック板同士を基板として使用するように、同一種類の板を複層化したもの基板として使用する積層体などでもよい。
支持基板としてガラス板を採用する場合、支持ガラス基板の厚さ、形状、大きさ、物性(熱収縮率、表面形状、耐薬品性等)、組成等は特に限定されない。
支持ガラス基板の厚さは特に限定されないが、支持体付き表示装置用パネルが現行の製造ラインで処理できるような厚さであることが必要である。
例えば0.1~1.1mmの厚さであることが好ましく、0.3~0.8mmであることがより好ましく、0.4~0.7mmであることがさらに好ましい。
例えば、現行の製造ラインが厚さ0.5mmの基板を処理するように設計されたものであって、薄板ガラス基板の厚さが0.1mmである場合、支持ガラス基板の厚さと樹脂層の厚さとあわせて0.4mmである。また、現行の製造ラインは厚さが0.7mmのガラス基板を処理するように設計されているものが最も一般的であるが、例えば薄板ガラス基板の厚さが0.4mmならば、樹脂層の厚さとあわせて0.3mmとする。
支持ガラス基板の厚さは、前記薄板ガラス基板よりも厚いことが好ましい。
樹脂層は前記支持ガラス基板の第1主面に固定されている。そして、樹脂層は前記薄板ガラス基板の第1主面に密着しているが、容易に剥離することができる。すなわち樹脂層は、前記薄板ガラス基板の第1主面に対してある程度の結合力で結合しているが、剥離に際しては、薄板ガラス基板を破壊することがなく、容易に剥離できる程度の結合力で結合している。本発明では、樹脂層表面の容易に剥離できる性質を剥離性という。
本発明の支持体付きパネルにおいて、樹脂層と薄板ガラス基板の第1主面とは粘着剤が有するような粘着力によっては付いておらず、固体分子間におけるファンデルワールス力に起因する力、すなわち、密着力によって付いていることが好ましい。
一方、樹脂層の前記支持ガラス基板の第1主面に対する結合力は、前記薄板ガラス基板の第1主面に対する結合力よりも相対的に高い。本発明では薄板ガラス基板の第1主面に対する結合を密着といい、支持ガラス基板の第1主面に対する結合を固定という。
また、気泡や異物が介在しても、薄板ガラス基板のゆがみ欠陥の発生を抑制することができるからである。また、樹脂層の厚さが厚すぎると、形成するのに時間および材料を要するため経済的ではない。
また、樹脂層が2層以上からなる場合は、各々の層を形成する樹脂の種類が異なってもよい。
また、樹脂層は、ガラス転移点が室温(25℃程度)よりも低いまたはガラス転移点を有しない材料からなることが好ましい。非粘着性の樹脂層となり、より高い剥離性を有し、より容易に薄板ガラス基板の第1主面と剥離することができ、同時に薄板ガラス基板の第1主面との密着も十分になるからである。
また、樹脂層が耐熱性を有していることが好ましい。本発明のパネル製造方法では、例えば前記薄板ガラス基板の第2主面上に表示装置用部材を形成する場合に、薄板ガラス基板と樹脂層と支持ガラス基板とのガラス積層体を熱処理に供し得るからである。
また、樹脂層の弾性率が高すぎると薄板ガラス基板の第1主面との密着性が低くなるので好ましくない。また弾性率が低すぎると剥離性が低くなるので好ましくない。
図1は、本発明の支持体付きパネルの一態様を示す概略断面図である。
図1において表示装置用パネル16は、層状の表示装置用部材14および薄板ガラス基板12からなり、これらは積層されている。ここで表示装置用部材14は薄板ガラス基板12の第2主面上に形成されている。そして、薄板ガラス基板12の第1主面と、支持ガラス基板19の第1主面に固定された樹脂層18の表面とが密着して付いて、本発明の支持体付きパネル10を形成している。
図1に示す態様の本発明の支持体付きパネル10は、薄板ガラス基板12と樹脂層18と支持ガラス基板19とが、面方向においてほぼ同じ大きさである。
図2および図3において、表示装置用パネル26は、層状の表示装置用部材24および薄板ガラス基板22からなり、これらは積層されている。ここで表示装置用部材24は薄板ガラス基板22の第2主面上に形成されている。そして、薄板ガラス基板22の第1主面と、支持ガラス基板29の第1主面に固定された樹脂層28とが密着して付いており、本発明の支持体付きパネル20を形成している。
図2および図3に示す態様の本発明の支持体付きパネル20は、薄板ガラス基板22よりも支持ガラス基板29の主面面積が大きく、かつ、薄板ガラス基板22の面方向の外縁は支持ガラス基板29の外縁からはみ出ていない。
このような隙間部25が形成されていると、後述する本発明のパネル製造方法における剥離工程において、薄板ガラス基板と樹脂層とをより容易に剥離できるので好ましい。
なお、「隙間部の深さ」とは薄板ガラス基板の端面(γ2)から、当該端面の垂直方向に、樹脂層の端面までの長さを意味する。図2、図3に示す場合であれば、αで示す部分の長さを意味する。なお、後述する図5に示す態様のように、薄板ガラス基板の端面から樹脂層の端面までのその端面に垂直方向の長さが、起点となる薄板ガラス基板の端面の箇所によって異なる場合、最大の長さを「隙間部の深さ」とする。
本発明の支持体付きパネルの製造方法は特に限定されないが、前記支持ガラス基板の第1主面に剥離性表面を有する樹脂層を形成する樹脂層形成工程と、前記薄板ガラス基板と前記支持ガラス基板とを積層して、前記薄板ガラス基板の第1主面に前記樹脂層の剥離性表面を密着させる密着工程と、前記薄板ガラス基板の第2主面に表示装置用部材を形成する表示装置用部材形成工程と、を具備する支持体付きパネルの製造方法であることが好ましい。
支持ガラス基板の表面(第1主面)に樹脂層を形成する方法も特に限定されない。
例えばフィルム状の樹脂を支持ガラス基板の表面に接着する方法が挙げられる。具体的にはフィルムの表面に高い接着力を付与するために表面改質の処理を行いし、支持ガラス基板の第1主面に接着する方法が挙げられる。表面改質の処理方法としては、シランカップリング剤のような化学的に密着力を向上させる化学的方法(プライマー処理)や、フレーム(火炎)処理のように表面活性基を増加させる物理的方法、サンドブラスト処理のように表面の粗度を増加させることにより引っかかりを増加させる機械的方法などが例示される。
例えば、無溶剤型の剥離紙用シリコーンを樹脂組成物として用いた場合、ダイコート法、スピンコート法またはスクリーン印刷法が好ましい。
また、例えば、剥離紙用シリコーンを用いて樹脂層を製造した場合、支持ガラス基板の第1主面上に塗工した剥離紙用シリコーンを加熱硬化してシリコーン樹脂層を形成した後、密着工程で支持ガラス基板のシリコーン樹脂形成面に薄板ガラス基板を積層させる。剥離紙用シリコーンを加熱硬化させることによって、シリコーン樹脂硬化物が支持ガラス基板と化学的に結合する。また、効果によってシリコーン樹脂層が支持ガラス基板と結合する。これらの作用によって、シリコーン樹脂層が支持ガラス基板の第1主面に強固に固定される。
密着工程は、前記薄板ガラス基板の第1主面と、前記樹脂層が第1主面に形成された前記支持ガラス基板とを積層して、前記薄板ガラス基板の第1主面に前記樹脂層の剥離性表面を密着させる工程である。
薄板ガラス基板の第1主面と樹脂層の剥離性表面とは、非常に近接した、相対する固体分子間におけるファンデルワールス力に起因する力、すなわち、密着力によって結合させることが好ましい。この場合、支持ガラス基板と薄板ガラス基板とを積層させた状態に保持することができる。
真空ラミネート法や真空プレス法により圧着すると気泡の混入の抑制や良好な密着の確保がより好ましく行われるのでより好ましい。真空下で圧着することにより、微少な気泡が残存した場合でも加熱により気泡が成長することがなく、薄板ガラス基板のゆがみ欠陥につながりにくいという利点もある。
表示装置用部材を形成するに当たり、必要に応じて薄板ガラス基板の第2主面を研磨することによりその平坦度を向上させることも好ましい。
表示装置用部材は特に限定されない。例えばLCDが有するアレイやカラーフィルタが挙げられる。また、例えばOLEDが有する透明電極、ホール注入層、ホール輸送層、発光層、電子輸送層が挙げられる。
表示装置用部材形成工程は、前記薄板ガラス積層体の前記薄板ガラス基板の第2主面に表示装置用部材を形成する工程である。
前記表示装置用部材を前記薄板ガラス積層体の前記薄板ガラス基板の第2主面に形成する方法も特に限定されず、従来公知の方法と同様であってよい。
例えば表示装置としてLCDを製造する場合、従来公知のガラス基板上にアレイを形成する工程、カラーフィルタを形成する工程、アレイが形成されたガラス基板とカラーフィルタが形成されたガラス基板とをシール剤等を介して貼り合わせる工程(アレイ・カラーフィルタ貼り合わせ工程)等の各種工程と同様であってよい。より具体的には、これらの工程で実施される処理として、例えば純水洗浄、乾燥、成膜、レジスト塗布、露光、現像、エッチングおよびレジスト除去が挙げられる。さらに、アレイ・カラーフィルタ貼り合わせ工程を実施した後に行われる工程として、液晶注入工程および該処理の実施後に行われる注入口の封止工程があり、これらの工程で実施される処理が挙げられる。
本発明のパネル製造方法は特に限定されないが、前記支持体付きパネルから、前記支持ガラス基板および前記樹脂層からなる支持体を剥離する剥離工程と、該剥離工程を経て得た表示装置用パネルにおける薄板ガラス基板の第1主面に付いた、前記樹脂層に由来する転写物等の異物を除去する除去工程と、を具備するパネル製造方法であることが好ましい。
剥離工程は、前記支持体付き表示装置用パネルから、前記支持ガラス基板および前記樹脂層からなる支持体を剥離する工程である。
剥離方法は、薄板ガラス基板、その第2主面上に形成された表示装置用部材およびシール剤への熱的、電磁的、機械的および化学的な損傷を与えることなく剥離できる方法であれば、特に制限されるものでない。さらに支持ガラス基板に損傷のない方法が好ましく、さらに支持ガラス基板の第1主面に固定された剥離性を有する樹脂層に損傷のない方法がさらに好ましい。
除去工程は、前記表示装置用パネルにおける前記薄板ガラス基板の第1主面に付いた、異物を除去する工程である。
前述のように、前記剥離工程に供した後に得られる表示装置用パネルにおける薄板ガラス基板の第1主面(樹脂層と密着していた面)に偏光フィルムや位相差フィルム等の粘着剤付きフィルムを貼付しても、粘着強度が弱く、剥離してしまう場合があった。本発明者がこの原因について検討したところ、当該第1主面に樹脂層に由来する転写物、空気中に飛散する塵介、製造工程に起因する金属片や機械油等の異物が極僅かに付いていることが原因であると考えられた。そして、本発明者は前記異物を薄板ガラス基板および該薄板ガラス基板の第2主面に形成された表示装置用部材等に熱的、電磁的、機械的および化学的な損傷を与えずに除去する方法を見出した。
前記転写物について具体的に説明する。例えば樹脂層がシリコーンからなる場合、薄板ガラス基板の第1主面と支持ガラス基板の第1主面に固定されたシリコーン樹脂層との密着により、薄板ガラス基板の第1主面上に、比較的低分子量のシリコーン化合物が樹脂層内における拡散効果によって付くと考えられる。ここで、ガラス積層体が加熱工程を経る場合、シリコーン化合物を溶解し得る溶剤等を用いて薄板ガラス基板の第1主面からシリコーン化合物を除去することは困難である。一方、基板が薄板ガラス基板ではなくポリイミドなどの樹脂からなる基板(以下、樹脂基板ともいう。)のとき、支持体から樹脂基板を剥離後、シリコーン化合物を溶解し得る溶剤等を用いて、樹脂基板の第1主面に付着しているシリコーン化合物を除去できる。一般に、偏光フィルム等における粘着剤はアクリル系が用いられており、親水性であるガラス基板表面への適度な粘着強度が得られるよう調整されている。これに対して撥水性であるシリコーン化合物がガラス基板表面に付くと、アクリル系粘着剤のガラス基板表面への粘着強度が低下し、リワーク性は増す一方、外力によって偏光板が剥離してしまうことがある。
なお、偏光フィルムのガラス基板表面への粘着強度を決める因子として、ガラス基板表面の親水性すなわち水接触角に加え、フィルムの弾性、粘着剤の粘性などが挙げられるが、本発明において粘着強度は、25mm幅の偏光フィルム、または粘着剤付きフィルムをガラス基板表面に貼付したのち90°剥離するという方法で測定して得た値を意味するものとする。
このようなプラズマ照射処理により、当該薄板ガラス基板の第1主面への偏光板など粘着剤付きフィルムの粘着強度は、樹脂層との密着前に比べて同等またはそれ以上にすることが可能であり(すなわち、粘着強度f≧粘着強度f0となり)、好ましい。
前記薄板ガラス基板の第1主面にプラズマ照射する回数は特に限定されず、該薄板ガラス基板の第1主面が所望の粘着強度を得られれば、1回または複数回プラズマを照射してよい。
また、プラズマ照射時の前記薄板ガラス基板表面温度は100℃以下が好ましい。理由は表示装置用パネルのシール剤や液晶などの部材に劣化や損傷等を起こさせることなく、表示性能を維持できるためである。
常圧リモートプラズマ法を施すために利用できる装置を、図7を用いて説明する。
図7は、本発明のパネル製造方法の除去工程において、リモートプラズマ法によって前記異物を除去するために用いることができるプラズマ放電装置の模式的装置図である。
図7において、電圧印加電極42と接地電極43は、対向して設置され、基材に対向する面は、それぞれ固体誘電体46で被覆されている。処理ガスは、矢印方向に電圧印加電極42と接地電極43で形成される放電空間44に導入され、プラズマ化され、プラズマ吹き出し口45から表示装置用パネル50に向かって吹き出される。
ここで表示装置用パネル50の搬送速度は0.1~5m/minであることが好ましく、0.5~2m/minであることがより好ましく、1m/min程度であることが好ましい。
前記処理条件としては、例えば、コロナ放電時や火炎処理時の前記薄板ガラス基板表面温度は100℃以下が好ましい。理由は表示装置用パネルのシール剤や液晶などの部材に劣化や損傷等を起こさせることなく、表示性能を維持できるためである。
すなわち、単一種類の除去工程を複数回実施することで前記異物を除去したり、複数種類の除去工程を組み合わせて前記異物を除去したりすることが好ましい。例えば、上記のようなプラズマを用いた方法と酸等の薬液を用いた方法とを組み合わせて前記異物を除去することが挙げられる。また、除去工程において、さらに超音波振動を用いて前記異物を除去することが好ましい。
まず、薄板ガラス基板および支持ガラス基板を用意し、これらの表面を洗浄する。洗浄としては、例えば純水洗浄、UV洗浄が挙げられる。
次に、支持ガラス基板の第1主面上に樹脂層を形成する。例えば、支持ガラス基板の第1主面上にスクリーン印刷機を用いてシリコーン樹脂を塗工する。そして、加熱硬化して、支持ガラス基板の第1主面上に樹脂層を形成し、樹脂層が固定された支持ガラス基板を得る。
次に、樹脂層の剥離性表面と薄板ガラス基板の第1主面とを付けて貼り合せる。例えば、樹脂層と薄板ガラス基板とを室温下真空プレスして貼り合わせることができる。そして支持ガラス基板と樹脂層と薄板ガラス基板との積層体である薄板ガラス積層体を得ることができる。
次に、必要に応じて、薄板ガラス積層体における薄板ガラス基板の第2主面を研磨してもよく、洗浄してもよい。洗浄としては例えば純水洗浄、UV洗浄が挙げられる。
このような方法で薄板ガラス積層体を2個製造した後、各々の薄板ガラス積層体における薄板ガラス基板の第2主面に表示装置用部材を形成する。1個の薄板ガラス積層体は、公知のカラーフィルタ形成工程に供することで、その薄板ガラス基板の第2主面にカラーフィルタを形成する。そして、もう1個の薄板ガラス積層体は、公知のアレイ形成工程に供することで、その薄板ガラス基板の第2主面にアレイを形成する。
このような方法によって、本発明の支持体付きパネルを2個製造することができる。
なお、以下では、ここで得られたカラーフィルタを有する本発明の支持体付きパネルを「支持体付きパネルx」、アレイを有する本発明の支持体付きパネルを「支持体付きパネルy」ともいう。
ケース1では、上記のようにして支持体付きパネルxおよび支持体付きパネルyの各々におけるカラーフィルタ形成面とアレイ形成面とを対向させ、セル形成用紫外線硬化型シール剤等のシール剤を用いて貼り合わせる。ここで得られた本発明の支持体付きパネルを、以下では「支持体付きパネルz1」ともいう。支持体付きパネルz1は、未だ液晶を封入されていない状態のもの、いわゆる空セルの状態である。
次に、薬液による除去工程を実施する場合、支持体付きパネルz1の液晶注入孔を仮封止する。例えば紫外線硬化型シール剤等を用いて、該注入口の外側をさらに封止してもよい。
そして、シールした後の支持体付きパネルz1の2つの支持体を、前述の本発明のパネル製造方法における剥離工程に供して剥離する。そして、本発明のパネル製造方法における除去工程に供する。このようにして得られたパネルを、以下では「パネルw1」ともいう。剥離した2つの支持体は別の支持体付パネルの製造に再利用する。
次に、パネルw1の液晶注入孔の仮封止を除去した後、該パネルw1を個別セルに切断する。
次に、切断した個別セルに前記注入孔から液晶を注入し、その後、該注入孔を封止して液晶セルを形成する。
そして、さらに前記液晶セルに偏光板を貼り付け、バックライト等を形成して、LCD1を得ることができる。
なお、このケースでの本発明のパネル製造方法における除去工程は、支持体付きパネルから支持体の剥離後または個別セル切断し液晶セル形成後のいずれでもよい。但し、支持体の剥離後の薬液処理の場合は、空セル内への薬液の浸透を防止するため、前記注入孔の仮封止を施すことが望ましい。
ケース2では、従来知られている液晶滴下工法(ODF)を用いて液晶セルを製造する。支持体付きパネルxおよび支持体付きパネルyの各々におけるカラーフィルタ形成面とアレイ形成面のどちらか一方に液晶を垂らしておき、該液晶を垂らした形成面上に他方の形成面を対向させ、セル形成用紫外線硬化型シール剤等のシール剤を用いて貼り合わせる。ここで得られた本発明の支持体付きパネルを、以下では「支持体付きパネルz2」ともいう。
次に、支持体付きパネルz2の2つの支持体を、前述の本発明のパネル製造方法における剥離工程に供して剥離する。そして、本発明のパネル製造方法における除去工程に供する。このようにして得られたパネルを、以下では「パネルw2」ともいう。剥離した2つの支持体は別の支持体付パネルの製造に再利用する。
次に、パネルw2を個別セルに切断する。
そして、さらに個別セルに切断されたパネルw2に偏光板を貼り付け、バックライト等を形成して、LCD2を得ることができる。
なお、このケースでの本発明の除去工程は、支持ガラス基板の剥離後または個別にセル切断し液晶セル形成後のいずれでもよい。但し、支持体の剥離後の薬液処理の場合は、空セル内への薬液の浸透を防止するため、前記注入孔の仮封止を施すことが望ましい。
ケース3では、ODFを用いて液晶セルを製造する。支持体付きパネルxおよび支持体付きパネルyの各々におけるカラーフィルタ形成面とアレイ形成面のどちらか一方に液晶を垂らしておき、該液晶を垂らした形成面上に他方の形成面を対向させ、セル形成用紫外線硬化型シール剤等のシール剤を用いて貼り合わせる。そして、前記貼り合わされた支持体付きパネルxおよび支持体付きパネルyは、支持体とともに個別セルに切断する。ここで切断して得られた本発明の支持体付きパネルを、以下では「支持体付きパネルz3」ともいう。
次に、支持体付きパネルz3の2つの支持体を、前述の本発明のパネル製造方法における剥離工程に供して剥離する。そして、本発明のパネル製造方法における除去工程に供する。このようにして得られたパネルを、以下では「パネルw3」ともいう。
そして、パネルw3に偏光板を付け、バックライト等を形成して、LCD3を得ることができる。
ケース4では、上記のようにして支持体付きパネルxおよび支持体付きパネルyの各々におけるカラーフィルタ形成面とアレイ形成面とを対向させ、セル形成用紫外線硬化型シール剤等のシール剤を用いて貼り合わせる。そして、支持体とともに個別セルに切断する。ここで切断して得られた本発明の支持体付きパネルを、以下では「支持体付きパネルz4」ともいう。支持体付きパネルz4は、未だ液晶を封入されていない状態のもの、いわゆる空セルの状態である。
次に、薬液による除去工程を実施する場合、支持体付きパネルz4の液晶注入孔を仮封止する。
次に、支持体付きパネルz4の2つの支持体を、前述の本発明のパネル製造方法における剥離工程に供して剥離する。そして、本発明のパネル製造方法における除去工程に供する。このようにして得られたパネルを、以下では「パネルw4」ともいう。
次に、パネルw4の液晶注入孔の仮封止を除去した後、該パネルw4のセルに液晶を注入し、その後封止する。
そして、さらに偏光板を付け、バックライトその他を形成して、LCD4を得ることができる。
但し、支持体の剥離後の薬液処理の場合は、空セル内への薬液の浸透を防止するため、前記注入孔の仮封止を施すことが望ましい。
本発明の表示装置の製造方法は、本発明のパネル製造方法を含む製造方法である。
本発明のパネル製造方法によって表示装置用パネルを得た後、さらに従来公知の工程に供することで、表示装置を得ることができる。
例えば、太陽電池用部材としては、シリコン型では、正極の酸化スズなど透明電極、p層/i層/n層で表されるシリコン層、および負極の金属等が挙げられ、その他に、化合物型、色素増感型、量子ドット型などに対応する各種部材等を挙げることができる。
また、薄膜2次電池用部材としては、リチウムイオン型では、正極および負極の金属または金属酸化物等の透明電極、電解質層のリチウム化合物、集電層の金属、封止層としての樹脂等が挙げられ、その他に、ニッケル水素型、ポリマー型、セラミックス電解質型などに対応する各種部材等を挙げることができる。
また、電子部品用回路としては、CCDやCMOSでは、導電部の金属、絶縁部の酸化ケイ素や窒化珪素等が挙げられ、その他に圧力センサ・加速度センサなど各種センサやリジッドプリント基板、フレキシブルプリント基板、リジッドフレキシブルプリント基板などに対応する各種部材等を挙げることができる。
初めに、縦720mm、横600mm、板厚0.4mm、線膨張係数38×10-7/℃の支持ガラス基板(旭硝子株式会社製、AN100、無アルカリガラス)を純水洗浄、UV洗浄して清浄化した。
次に、支持ガラス基板の第1主面上に、無溶剤付加反応型剥離紙用シリコーン(信越シリコーン社製、KNS-320A、粘度:0.40Pa・s、溶解パラメータ(SP値)=7.3)100質量部と白金系触媒(信越シリコーン社製、CAT-PL-56)2質量部との混合物を、縦705mm、横595mmの大きさで長方形にスクリーン印刷機にて塗工した(塗工量30g/m2)。
次に、これを180℃にて30分間大気中で加熱硬化して、支持ガラス基板の第1主面に厚さ20μmのシリコーン樹脂層を形成した。
なお、樹脂層の形成および薄板ガラス基板の積層は、薄板ガラス積層体A1の端部に深さ15mmの隙間部が形成されるように行った。
得られた薄板ガラス積層体A1において、両ガラス基板は、シリコーン樹脂層と気泡を発生することなく密着しており、ゆがみ状欠点もなく平滑性も良好であった。
その結果、粘着強度は90°剥離で4.7N/25mmであった。また、薄板ガラス基板a1の第1主面を光学顕微鏡で観察したところ、異物付着やワレ、カケは見当たらなかった。
なお、薄板ガラス積層体A1を形成する前における薄板ガラス基板の第1主面における粘着強度は3.9N/25mmであった。
支持ガラス基板の第1主面上に、両末端にビニル基を有する直鎖状ポリオルガノシロキサン(荒川化学工業株式会社製、商品名「8500」)と、分子内にハイドロシリル基を有するメチルハイドロジェンポリシロキサン(荒川化学工業株式会社製、商品名「12031」)と、白金系触媒(荒川化学工業株式会社製、商品名「CAT12070」)との混合物を用いた以外は、実施例1aと同様の方法で、薄型ガラス積層体(以下「薄板ガラス積層体A2」ともいう)を得た後、大気中で加熱処理をおこなった。
次に、実施例1aと同様の方法で薄板ガラス基板と支持体(樹脂層を有する支持ガラス基板)とを剥離した。剥離して得られた薄板ガラス基板を「薄板ガラス基板a2」ともいう。
次に、実施例1aと同様の方法で薄板ガラス基板a2の第1主面における偏光フィルムの粘着強度を測定した結果、0.60N/25mmであった。
次に、一旦偏光フィルムを剥離し、当該薄型ガラス基板a2を、20重量%に希釈したレジスト剥離液(パーカーコーポレーション社製、主成分として水酸化カリウム20質量%を含む)に50℃10分浸漬し、水洗およびエアブローを行った。
次に、当該薄板ガラス基板a2の第1主面における偏光フィルムの粘着強度を測定した結果、4.5N/25mmであった。
実施例1bと同様の方法で、薄型ガラス積層体(以下「薄板ガラス積層体A3」ともいう)を得た後、大気中で加熱処理をおこなった。
次に、実施例1bと同様の方法で、薄板ガラス基板と支持体(樹脂層を有する支持ガラス基板)とを剥離した。剥離して得られた薄板ガラス基板を「薄板ガラス基板a3」ともいう。
次に、当該薄板ガラス基板a3をレジスト剥離液に浸漬した。ここで剥離液の温度は50℃とし、浸漬は5分間行った。また、液槽内に設置した超音波振動板を用いて、薄板ガラス基板a3に超音波振動を加えた。
次に、当該薄板ガラス基板a3の第1主面における偏光フィルムの粘着強度を測定した結果、4.0N/25mmであった。
実施例1bと同様の方法で、薄型ガラス積層体(以下「薄板ガラス積層体A4」ともいう)を得た後、大気中で加熱処理をおこなった。
次に、実施例1bと同様の方法で、薄板ガラス基板と支持体(樹脂層を有する支持ガラス基板)とを剥離した。剥離して得られた薄板ガラス基板を「薄板ガラス基板a4」ともいう。
次に、当該薄板ガラス基板a4の第1主面を、フレーム処理機(アルコテック社製)で、酸素バーナー火炎の縁部を10m/minのスキャン速度で4回、薄板ガラス基板の表面温度が100℃以下の条件で処理を行った。
次に、当該薄板ガラス基板a4の第1主面における偏光フィルムの粘着強度を測定した結果、4.0N/25mmであった。
実施1eでは、薄板ガラス基板を、厚さ0.05mmのポリイミド樹脂基板(東レ・デュポン社製、カプトン200HV)に変更した以外は、実施例1aと同様の方法でデバイス用基板積層体(以下「デバイス用基板積層体A5」ともいう)を得た。ポリイミド樹脂基板の両主面のうち、樹脂層の剥離性表面と密着する面を第1主面とし、電子デバイス用部材を形成する主面を第2主面とする。実施例1aと同様の方法で、デバイス用基板積層体A5の樹脂層の耐熱性を評価したが、熱による劣化はなく、耐熱性が良好であることが確認できた。
次に、実施例1aと同様の方法でポリイミド樹脂基板と支持体(樹脂層を有する支持ガラス基板)とを剥離した。剥離して得られたポリイミド樹脂基板を「ポリイミド樹脂基板a5」ともいう。
次に、実施例1aと同様の方法でポリイミド樹脂基板a5の第1主面に、実施例1aと同様の方法で偏光フィルムを貼付した。そして、ポリイミド樹脂基板a5の第1主面における偏光フィルムの粘着強度を測定した。偏光フィルムの粘着強度は、0.50N/25mmであった。
次に、実施例1aと同様の方法でポリイミド樹脂基板a5の第1主面に、常圧リモートプラズマ装置を用いてプラズマを照射し、偏光フィルムを貼付した。ポリイミド樹脂基板a5の第1主面における偏光フィルムの粘着強度を測定した結果、3.0N/25mmであった。
なお、デバイス用基板積層体A5形成前のポリイミド樹脂基板の第1主面における粘着強度は1.5N/25mmであった。
実施1fでは、薄板ガラス基板を、厚さ0.1mmの鏡面処理を施したステンレス(SUS304)基板に変更した以外は、実施例1aと同様の方法でデバイス用基板積層体(以下「デバイス用基板積層体A6」ともいう)を得た。ステンレス基板の両主面のうち、樹脂層の剥離性表面と密着する面を第1主面とし、電子デバイス用部材を形成する主面を第2主面とする。実施例1aと同様の方法で、デバイス用基板積層体A6の樹脂層の耐熱性を評価したが、熱による劣化はなく、耐熱性が良好であることが確認できた。
次に、実施例1aと同様の方法でステンレス基板と支持体(樹脂層を有する支持ガラス基板)とを剥離した。剥離して得られたステンレス基板を「ステンレス基板a6」ともいう。
次に、実施例1aと同様の方法でステンレス基板a6の第1主面に、実施例1aと同様の方法で偏光フィルムを貼付した。そして、ステンレス基板a6の第1主面における偏光フィルムの粘着強度を測定した。偏光フィルムの粘着強度は、0.40N/25mmであった。
次に、実施例1aと同様の方法でステンレス基板a6の第1主面に、常圧リモートプラズマ装置を用いてプラズマを照射し、偏光フィルムを貼付した。ステンレス基板a6の第1主面における偏光フィルムの粘着強度を測定した結果、1.5N/25mmであった。
なお、デバイス用基板積層体A6形成前のステンレス基板の第1主面における粘着強度は1.0N/25mmであった。
初めに、縦350mm、横300mm、板厚0.08mm、線膨張係数38×10-7/℃のガラスフィルム(旭硝子株式会社製、AN100、無アルカリガラス)を、アルカリ洗剤による洗浄を行い、ガラスフィルムの表面を清浄化した。さらに、ガラスフィルムの表面に、γ-メルカプトプロピルトリメトキシシランの0.1%メタノール溶液を噴霧し、80℃で3分乾燥させた。一方で、縦350mm、横300mm、板厚0.05mmのポリイミド樹脂基板(東レ・デュポン社製、カプトン200HV)の表面をプラズマ処理した。そして、ガラスフィルムとポリイミド樹脂基板とを重ね合わせ、320℃に加熱したプレス装置を用いて、ガラス/樹脂積層基板とした。ガラス/樹脂積層基板の両主面のうち、樹脂層の剥離性表面と密着するポリイミド樹脂基板側の主面を第1主面とし、対向するガラスフィルム側の主面を第2主面とする。
実施例1gでは、薄板ガラス基板を前記ガラス/樹脂積層基板に変更した以外は、実施例1aと同様の方法でデバイス用基板積層体(以下「デバイス用基板積層体A7」ともいう)を得た。実施例1aと同様の方法で、デバイス用基板積層体A7の樹脂層の耐熱性を評価したが、熱による劣化はなく、耐熱性が良好であることが確認できた。
次に、実施例1aと同様の方法でガラス/樹脂積層基板と支持体(樹脂層を有する支持ガラス基板)とを剥離した。剥離して得られたガラス/樹脂積層基板を「ガラス/樹脂積層基板a7」ともいう。
次に、実施例1aと同様の方法でガラス/樹脂積層基板a7の第1主面に、実施例1aと同様の方法で偏光フィルムを貼付した。そして、ガラス/樹脂積層基板a7の第1主面における偏光フィルムの粘着強度を測定した。偏光フィルムの粘着強度は、0.40N/25mmであった。
次に、実施例1aと同様の方法でガラス/樹脂積層基板a7の第1主面に、常圧リモートプラズマ装置を用いてプラズマを照射し、偏光フィルムを貼付した。ガラス/樹脂積層基板a7の第1主面における偏光フィルムの粘着強度を測定した結果、3.0N/25mmであった。
なお、デバイス用基板積層体A7形成前におけるガラス/樹脂積層基板の第1主面における粘着強度は1.5N/25mmであった。
実施例1hでは、実施例1eと同様の方法でデバイス用基板積層体A51を得た。
次に、実施例1eと同様の方法でポリイミド樹脂基板と支持体(樹脂層を有する支持ガラス基板)とを剥離した。
次に、実施例1aと同様の方法でデバイス用基板積層体A51におけるポリイミド樹脂基板の第1主面に、実施例1aと同様の方法で偏光フィルムを貼付した。そして、ポリイミド樹脂基板の第1主面における偏光フィルムの粘着強度を測定した。偏光フィルムの粘着強度は、0.40N/25mmであった。
次に、ポリイミド樹脂基板の第1主面に、アルコール系洗浄剤(ネオコールR7、日本アルコール販売社製)を吹き付けながらブラシ洗浄する。エアブローによって、ポリイミド樹脂基板の第1主面から洗浄剤を除去した後に、実施例1aと同様の方法で偏光フィルムを貼付した。ポリイミド樹脂基板の第1主面における偏光フィルムの粘着強度を測定した結果、2.8N/25mmであった。
初めに、縦720mm、横600mm、板厚0.6mm、線膨張係数38×10-7/℃の支持ガラス基板(旭硝子株式会社製、AN100、無アルカリガラス)を純水洗浄、UV洗浄で清浄化した。
次に、支持ガラス基板の第1主面上に、両末端にビニル基を有する直鎖状ポリオルガノシロキサン(荒川化学工業株式会社製、商品名「8500」)と、分子内にハイドロシリル基を有するメチルハイドロジェンポリシロキサン(荒川化学工業株式会社製、商品名「12031」)と、白金系触媒(荒川化学工業株式会社製、商品名「CAT12070」)との混合物を、縦705mm、横595mmの大きさで、スクリーン印刷機にて塗工した(塗工量20g/m2)。ここで、ハイドロシリル基とビニル基とのモル比が1/1となるように、直鎖状ポリオルガノシロキサンとメチルハイドロジェンポリシロキサンとの混合比を調整した。白金系触媒は、直鎖状ポリオルガノシロキサンとメチルハイドロジェンポリシロキサンとの合計100質量部に対して5質量部とした。
次に、これを180℃にて30分間大気中で加熱硬化して、支持ガラス基板の第1主面に厚さ20μmのシリコーン樹脂層を形成した。
なお、樹脂層の形成および薄板ガラス基板の積層は、薄板ガラス積層体Bの端部に深さ15mmの隙間部が形成されるように行った。
得られた薄板ガラス積層体Bにおいて、両ガラス基板は、シリコーン樹脂層と気泡を発生することなく密着しており、ゆがみ状欠点もなく平滑性も良好であった。
また、他方の薄板ガラス積層体B(「薄板ガラス積層体B2」という)の薄板ガラス基板の第2主面にカラーフィルタを形成する。具体的には、ブラックマトリックスおよびRGB画素は塗布およびベーク法で、電極層はスパッタリング法で形成し、それぞれのパターニングはフォトリソグラフィという方法でカラーフィルタを形成する。
実施例2で形成した薄板ガラス積層体Bと、厚さ0.7mmの無アルカリガラス基板(旭硝子株式会社製、AN100、無アルカリガラス)とを用意した(ここで用いる薄板ガラス積層体Bを、「薄板ガラス積層体B3」とする)。そして、実施例2と同様の方法で、薄板ガラス積層体B3の薄板ガラス基板の第2主面にカラーフィルタを形成し、無アルカリガラス基板の一方の主面に、アレイを形成した。
そして、得られた液晶セルを実施例2と同様のレジスト剥離液に浸漬する。ここで剥離液の温度は50℃とし、浸漬は5分間行う。また、液槽内に設置した超音波振動板を用いて、液晶セルに超音波振動を加える。
実施例2で形成した薄板ガラス積層体Bを2つ用意する。そして、実施例2と同様の方法で、一方の薄板ガラス積層体B(「薄板ガラス積層体B4」という)の薄板ガラス基板の第2主面にアレイを形成する。また、他方の薄板ガラス積層体B(「薄板ガラス積層体B5」という)の薄板ガラス基板の第2主面に有機EL構造体を形成する。具体的には、透明電極を形成する工程、補助電極を形成する工程、ホール注入層・ホール輸送層・発光層・電子輸送層等を蒸着する工程、これらを封止する工程を実施して、薄板ガラス積層体B5の薄板ガラス基板上に、有機EL構造体を形成する。
こうして得られるOLEDは、特性上問題は生じない。
上記の例では、表示のパネル単位に分断する前に、支持体を剥離するが、複数のパネル同士が繋がった構造を単位として処理することもできる。
上記の例の他に、表示のパネル単位に分断した後に、支持体を剥離することもできる。
本出願は、2009年3月24日出願の日本特許出願2009-072282に基づくものであり、その内容はここに参照として取り込まれる。
12、22、32 薄板ガラス基板
14、24、34 表示装置用部材
16、26 表示装置用パネル
18、28、38 樹脂層
19、29、39 支持ガラス基板
25 隙間部
41 電源(高電圧パルス電源)
42 電圧印加電極
43 設置電極
44 放電空間
45 プラズマ吹き出し口
46 固体誘電体
50 剥離工程後の表示装置用パネル
Claims (8)
- 第1主面および第2主面を有し第2主面に電子デバイス用部材を有する基板の第1主面に、第1主面および第2主面を有する支持基板の第1主面に固定された剥離性表面を有する樹脂層が密着している支持体付き電子デバイスから、前記支持基板および前記樹脂層からなる支持体を剥離し、前記電子デバイス用部材および基板を含む電子デバイスを得る剥離工程と、
前記電子デバイスにおける前記基板の第1主面に付いた、異物を除去する除去工程と
を具備する、電子デバイスの製造方法。 - 前記樹脂層がシリコーン樹脂層である、請求項1に記載の電子デバイスの製造方法。
- 前記樹脂層の剥離性表面を前記基板の第1主面に密着する前における前記基板の第1主面の粘着強度をf0とし、前記除去工程の後に得られる電子デバイスにおける前記基板の第1主面の粘着強度をfとした場合に、f≧f0となる、請求項1または2に記載の電子デバイスの製造方法。
- 前記除去工程が、前記基板の第1主面にプラズマを照射して、前記異物を除去する工程である、請求項1~3のいずれかに記載の電子デバイスの製造方法。
- 前記除去工程が、酸またはアルカリを含む薬液を用いて前記異物を除去する工程である、請求項1~3のいずれかに記載の電子デバイスの製造方法。
- 前記除去工程が、溶解度パラメータが7~15である溶剤を含む薬液を用いて、前記異物を除去する工程である、請求項1~3のいずれかに記載の電子デバイスの製造方法。
- さらに超音波振動を用いて前記異物を除去する工程である、請求項5または6に記載の電子デバイスの製造方法。
- 前記除去工程を2以上有する、請求項1~7のいずれかに記載の電子デバイスの製造方法。
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012146448A (ja) * | 2011-01-11 | 2012-08-02 | Nitto Denko Corp | 有機el装置の製造方法および有機el装置製造用基板 |
| JP2013130888A (ja) * | 2012-08-17 | 2013-07-04 | Asahi Glass Co Ltd | 電子デバイス用部材および電子デバイスの製造方法、ならびに電子デバイス用部材 |
| WO2014073455A1 (ja) * | 2012-11-09 | 2014-05-15 | 日本電気硝子株式会社 | ガラスフィルム積層体及び電子・電気デバイスの製造方法 |
| US9500890B2 (en) | 2013-11-15 | 2016-11-22 | Samsung Display Co., Ltd. | Method of manufacturing device substrate and display device manufactured using the same |
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| CN104903095B (zh) * | 2012-12-28 | 2017-10-13 | 旭硝子株式会社 | 玻璃层叠体及其制造方法、以及带有机硅树脂层的支撑基材 |
| KR20140146522A (ko) | 2013-06-17 | 2014-12-26 | 엘지디스플레이 주식회사 | 액정 표시 장치 및 이를 제조하는 방법 |
| JP6260441B2 (ja) * | 2014-04-30 | 2018-01-17 | 旭硝子株式会社 | 樹脂層の除去方法 |
| JP6573544B2 (ja) * | 2015-12-21 | 2019-09-11 | 日東電工株式会社 | 剥離方法 |
| CN111201560B (zh) * | 2017-11-10 | 2022-02-18 | 深圳市柔宇科技股份有限公司 | 柔性显示屏及其切割修边方法 |
| CN109461844B (zh) | 2018-10-09 | 2020-02-18 | 深圳市华星光电技术有限公司 | 柔性基板的制造方法 |
| KR20210035382A (ko) | 2019-09-23 | 2021-04-01 | 삼성디스플레이 주식회사 | 표시 장치 및 캐리어 패널 |
| CN112103319B (zh) * | 2020-09-22 | 2024-06-18 | 京东方科技集团股份有限公司 | 显示面板、显示装置及显示面板的制造方法 |
| CN118869851A (zh) * | 2021-10-09 | 2024-10-29 | 荣耀终端有限公司 | 壳体组件、其制备方法及终端 |
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| TWI480165B (zh) | 2015-04-11 |
| TW201113155A (en) | 2011-04-16 |
| CN102362305A (zh) | 2012-02-22 |
| CN102362305B (zh) | 2015-04-01 |
| JPWO2010110087A1 (ja) | 2012-09-27 |
| KR20110131223A (ko) | 2011-12-06 |
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