WO2015152120A1 - 剥離層形成用組成物 - Google Patents
剥離層形成用組成物 Download PDFInfo
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- WO2015152120A1 WO2015152120A1 PCT/JP2015/059849 JP2015059849W WO2015152120A1 WO 2015152120 A1 WO2015152120 A1 WO 2015152120A1 JP 2015059849 W JP2015059849 W JP 2015059849W WO 2015152120 A1 WO2015152120 A1 WO 2015152120A1
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- release layer
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
- C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C09D179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1067—Wholly aromatic polyimides, i.e. having both tetracarboxylic and diamino moieties aromatically bound
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/18—Polybenzimidazoles
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/20—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for coatings strippable as coherent films, e.g. temporary coatings strippable as coherent films
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/20—Diluents or solvents
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133305—Flexible substrates, e.g. plastics, organic film
Definitions
- the present invention relates to a composition for forming a release layer provided directly on a glass substrate.
- Patent Documents 1, 2, and 3 an amorphous silicon thin film layer is formed on a glass substrate, a plastic substrate is formed on the thin film layer, and then a laser is irradiated from the glass surface side to accompany crystallization of amorphous silicon.
- a method of peeling a plastic substrate from a glass substrate with generated hydrogen gas is disclosed.
- Patent Document 4 discloses a method for completing a liquid crystal display device by attaching a layer to be peeled (described as “transfer target layer” in Patent Document 4) to a plastic film using the techniques disclosed in Patent Documents 1 to 3. Is disclosed.
- Patent Documents 1 to 4 particularly the method disclosed in Patent Document 4, it is essential to use a highly light-transmitting substrate, and hydrogen contained in amorphous silicon is allowed to pass through the substrate.
- hydrogen contained in amorphous silicon is allowed to pass through the substrate.
- irradiation with a relatively large laser beam is required and the layer to be peeled is damaged.
- it takes a long time for laser treatment and it is difficult to peel off a layer to be peeled having a large area there is a problem that it is difficult to increase the productivity of device fabrication.
- JP-A-10-125929 Japanese Patent Laid-Open No. 10-125931.
- an object of the present invention is to solve the above problems. Specifically, the objective of this invention is providing the composition for forming the peeling layer for making it peel without damaging the board
- the object of the present invention is to maintain adhesion with a glass substrate on which a release layer is provided and does not cause peeling at the interface with the glass substrate.
- An object of the present invention is to provide a composition for forming a release layer, which can easily peel a layer or a group of layers formed thereon from the release layer.
- the present inventor has now found the following invention. That is, the present inventor forms a release layer using a composition containing a polyamic acid having a monomer unit having a specific structure of 50 mol% or more and a weight average molecular weight of a certain value or more, and an organic solvent. It has unexpectedly been found that the layer has suitable properties that can be peeled off without damaging the substrate applied to the flexible electronic device or the like.
- This layer is a layer or layer formed above the release layer on the side opposite to the glass substrate, while maintaining adhesion to the glass substrate on which the release layer is provided and hardly causing peeling at the interface with the glass substrate. About a group, it was able to peel easily from a peeling layer. The present invention is based on such knowledge.
- a composition for forming a release layer comprising a polyamic acid containing 50 mol% or more of a monomer unit represented by the following formula (1) and having a weight average molecular weight of 10,000 or more and an organic solvent.
- X 1 represents a tetravalent organic group
- Y 1 represents a divalent group represented by the following formula (P): (Wherein R represents F, Cl, an alkyl group having 1 to 3 carbon atoms, or a phenyl group, m represents an integer of 0 to 4, and r represents an integer of 1 to 4)] .
- the Y 1 may be a divalent group represented by any of the following formulas (P1) to (P3).
- R 1 , R 2 , R 3 , R 4 , R 5 and R 6 may be the same or different and each represents F, Cl, an alkyl group having 1 to 3 carbon atoms, or a phenyl group;
- m1, m2, m3, m4, m5 and m6 may be the same or different and each represents an integer of 0 to 4.
- the ⁇ 2> Y 1 may include at least a divalent group represented by the formula (P1).
- the polyamic acid may further include a monomer unit represented by the following formula (2).
- X 1 is as defined in ⁇ 1> above, and Y 2 represents a group represented by the following formula (P4):
- R 7 and R 8 may be the same or different and each represents F, Cl, an alkyl group having 1 to 3 carbon atoms, or a phenyl group;
- R ′ represents a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, or a phenyl group, l represents an integer of 0 to 4, and m is as defined in the above ⁇ 1>)].
- X 1 may be a tetravalent aromatic group.
- the tetravalent aromatic group may have at least one selected from a benzene skeleton, a naphthalene skeleton, and a biphenyl skeleton.
- the organic solvent may be a solvent represented by the following formula (A) or (B). (Wherein R a and R b may be the same or different and each represents an alkyl group having 1 to 4 carbon atoms, and h represents a natural number).
- the content of the monomer unit represented by the formula (1) in the polyamic acid may be 60 mol% or more.
- the composition for forming a release layer according to the present invention is preferably for forming a release layer provided directly on a glass substrate.
- a substrate structure applied to a flexible electronic device A base substrate; A release layer that covers the base substrate in one or more regions, and is formed of the release layer forming composition according to any one of ⁇ 1> to ⁇ 9>; Including the base substrate and a flexible substrate covering the release layer; A substrate structure, wherein an adhesion force between the flexible substrate and the release layer is larger than an adhesion force between the release layer and the base substrate.
- the base substrate may include glass.
- a method for producing a release layer wherein the release layer forming composition according to any one of ⁇ 1> to ⁇ 9> is used.
- the method for producing the release layer includes a step of applying the release layer forming resin composition to a substrate and heating the substrate.
- a method for producing a substrate structure applied to a flexible electronic device Preparing a base substrate, Producing a release layer that covers the base substrate in one or more regions using the release layer forming composition according to any one of ⁇ 1> to ⁇ 9>; Forming a flexible substrate on the base substrate and the release layer;
- the manufacturing method characterized by the adhesive force of the said flexible substrate and the said peeling layer being larger than the adhesive force of the said peeling layer and the said base base
- the present invention can solve the above problems. Specifically, according to the present invention, it is possible to provide a composition for forming a release layer for peeling without damaging a substrate applied to a flexible electronic device. Further, according to the present invention, in addition to the above effects or in addition to the above effects, the adhesion with the glass substrate on which the release layer is provided is maintained, and peeling at the interface with the glass substrate does not occur. It is providing the composition for forming this peeling layer which can peel the layer or layer group formed easily from a peeling layer.
- the release layer forming composition of the present invention is a polyamic acid containing 50 mol% or more of the monomer unit represented by the formula (1), and its weight average molecular weight is 10 , 1,000 or more polyamic acid and an organic solvent.
- X 1 represents a tetravalent organic group
- Y 1 represents a divalent group represented by the following formula (P).
- R represents F, Cl, an alkyl group having 1 to 3 carbon atoms, or a phenyl group, and preferably represents F or Cl.
- m represents an integer of 0 to 4, preferably 0 to 2, more preferably 0 to 1, and particularly preferably 0.
- r represents an integer of 1 to 3.
- the alkyl group having 1 to 3 carbon atoms includes methyl, ethyl, n-propyl, and i-propyl.
- the alkyl group having 1 to 3 carbon atoms is methyl, and more preferably, Methyl.
- the weight average molecular weight of the polyamic acid having the monomer unit represented by the formula (1) used in the present invention needs to be 10,000 or more, preferably 15,000 or more, more preferably 20,000 or more, more More preferably, it is 30,000 or more.
- the upper limit value of the weight average molecular weight of the polyamic acid used in the present invention is usually 2,000,000 or less, but it is possible to suppress the viscosity of the resin composition from becoming excessively high or to have a highly flexible resin thin film. In view of obtaining a good reproducibility, etc., it is preferably 1,000,000 or less, more preferably 200,000 or less.
- the monomer unit represented by the formula (1) is 50 mol% or more, preferably 60 mol% or more, more preferably 70 mol% or more, still more preferably 80 mol% or more, Preferably it contains 90 mol% or more.
- the polyamic acid contained in the composition for forming a release layer of the present invention is a polymer composed only of the monomer unit represented by the formula (1), that is, the monomer represented by the formula (1). It is a polymer containing 100 mol% of units.
- the monomer unit in such a polyamic acid may be only one specific type or two or more types as long as it is represented by the formula (1).
- the number of monomer units of the formula (1) contained in the polyamic acid is preferably 2 to 4, more preferably 2 to 3.
- the group represented by the formula (P) preferably includes a divalent group represented by any one of the formulas (P1) to (P3), more preferably the formula (P1) or (P3 ), And more preferably a divalent group represented by the formula (P3).
- R 1 , R 2 , R 3 , R 4 , R 5 and R 6 may be the same or different, and F, Cl represents an alkyl group having 1 to 3 carbon atoms, or a phenyl group, and preferably represents F or Cl.
- m1, m2, m3, m4, m5 and m6 may be the same or different and each represents an integer of 0 to 4, preferably 0 to 2, more preferably 0. Represents ⁇ 1, particularly preferably 0.
- the polyamic acid used in the present invention may contain other monomer units in addition to the monomer unit represented by the formula (1).
- the content of such other monomer units needs to be less than 50 mol%, preferably less than 40 mol%, more preferably less than 30 mol%, and less than 20 mol%. Is more preferable, and it is further more preferable that it is less than 10 mol%.
- Examples of such other monomer units include a monomer unit of the formula (2).
- X 1 represents a tetravalent organic group
- Y 2 represents a group represented by the above-described formula (P4).
- R 7 and R 8 may be the same or different and each represents F, Cl, an alkyl group having 1 to 3 carbon atoms, or a phenyl group.
- R 7 preferably represents F or Cl.
- R 8 preferably represents F or Cl.
- R ′ represents a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, or a phenyl group, preferably a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, more preferably a hydrogen atom.
- l and m may be the same or different and each represents an integer of 0 to 4, preferably 0 to 2, more preferably 0 to 1, and particularly preferably 0.
- Examples of such other monomer units include o-phenylenediamine, m-phenylenediamine, p-phenylenediamine, 2-methyl-1,4-phenylenediamine, and other monomer units of the formula (2).
- X 1 is a tetravalent organic group, preferably a tetravalent aromatic group.
- Tetravalent aromatic group X 1 can be taken, when creating a polyamic acid used in the present invention, it is possible to create by using an aromatic tetracarboxylic dianhydride as follows. That is, pyromellitic dianhydride, 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride, 3,3 ′, 4,4′-benzophenonetetracarboxylic dianhydride, 2,3,3 ', 4'-biphenyltetracarboxylic dianhydride, 3,3', 4,4'-diphenylsulfonetetracarboxylic dianhydride, 1,4,5,8-naphthalenetetracarboxylic dianhydride, 1, 2,5,6-naphthalenetetracarboxylic dianhydride, 4,4′-oxydiphthalic anhydride, 3,3 ′, 4,4′-dimethyldiphenylsilanetetracarboxylic dianhydride
- the aromatic tetracarboxylic dianhydride desired here is selected from the following group of compounds.
- R 3 is a divalent organic group having at least one aromatic ring, and preferably a group having a phenyl, biphenyl, or naphthalene skeleton).
- the tetravalent aromatic group that X 1 can take has any of a benzene skeleton, a naphthalene skeleton, a biphenyl skeleton, and a terphenyl skeleton, and more preferably benzene Those having any of a skeleton, a naphthalene skeleton, and a biphenyl skeleton, and more preferably those having any of a benzene skeleton and a biphenyl skeleton.
- the polyamic acid used in the present invention is a 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride (BPDA) (formula (4)) as an acid dianhydride.
- BPDA 4,4′-biphenyltetracarboxylic dianhydride
- P-phenylenediamine (pPDA) (formula (5)) and 4,4 ′′ -diamino-p-terphenyl (DATP) (formula (6)) as diamine
- pyromellitic acid as acid dianhydride It can be obtained by reacting dianhydride (PMDA) (formula (7)) and pPDA (formula (5)) as a diamine.
- the above reaction consists of 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride (BPDA), p-phenylenediamine (pPDA) and 4,4 ′′ -diamino-p-terphenyl (DATP).
- BPDA 4,4′-biphenyltetracarboxylic dianhydride
- pPDA p-phenylenediamine
- DATP 4,4 ′′ -diamino-p-terphenyl
- the charge ratio (molar ratio) of diamine or pyromellitic dianhydride (PMDA) and pPDA can be appropriately set in consideration of the molecular weight of the desired polyamic acid, the proportion of monomer units, and the like.
- the acid anhydride component can be about 0.7 to 1.3, preferably about 0.8 to 1.2.
- the charge ratio of pPDA and DATP which is a diamine
- the substance amount (m 1 ) of pPDA is usually about 1.7 to 20 when the substance amount (m 2 ) of DATP is 1.
- it is preferably 2.1 to 20, more preferably 2.2 to 20, still more preferably 2.3 to 19, and still more preferably 2.3 to 18.
- the composition for forming a release layer according to the present invention contains such an organic solvent.
- Any organic solvent can be used as long as it does not adversely affect the reaction. Specific examples include m-cresol, 2-pyrrolidone, N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, N-vinyl-2-pyrrolidone, N, N-dimethylacetamide, N, N-dimethylformamide.
- the organic solvent is a solvent represented by the formula (A) or (B).
- R a and R b may be the same or different and each represents an alkyl group having 1 to 4 carbon atoms, preferably 1 to 3 carbon atoms.
- h represents a natural number, preferably 1 to 3.
- the reaction temperature may be appropriately set in the range from the melting point to the boiling point of the solvent to be used, and is usually about 0 to 100 ° C. However, it prevents imidation of the resulting polyamic acid and maintains a high content of polyamic acid units. Therefore, it is preferably about 0 to 70 ° C, more preferably about 0 to 60 ° C, and still more preferably about 0 to 50 ° C.
- the reaction time depends on the reaction temperature and the reactivity of the raw material, it cannot be defined unconditionally, but is usually about 1 to 100 hours.
- a target reaction solution containing polyamic acid can be obtained.
- the filtrate is used as it is, or diluted or concentrated, and used as a release layer forming composition.
- the solvent used for dilution and concentration is not particularly limited, and examples thereof include those similar to the specific examples of the reaction solvent in the above reaction, and these may be used alone or in combination of two or more. .
- the solvents used are N, N-dimethylformamide, N, N-dimethylacetamide, N-methyl-2-pyrrolidone, 1,3 -Dimethyl-2-imidazolidinone, N-ethyl-2-pyrrolidone and ⁇ -butyrolactone are preferred.
- the concentration of the polyamic acid with respect to the total mass of the composition for forming the release layer is appropriately set in consideration of the thickness of the thin film to be produced (release layer), the composition viscosity, etc., but is usually about 0.5 to 30% by mass. Preferably, it is about 5 to 25% by mass.
- the viscosity of the release layer forming composition is appropriately set in consideration of the thickness of the thin film to be produced, etc., but the object is to obtain a resin thin film having a thickness of about 0.05 to 5 ⁇ m with good reproducibility. In this case, it is usually about 10 to 10,000 mPa ⁇ s at 25 ° C., preferably about 20 to 1000 mPa ⁇ s, and more preferably about 20 to 200 mPa ⁇ s.
- the viscosity of the release layer forming composition is measured using a commercially available liquid viscosity measurement viscometer, for example, referring to the procedure described in JIS K7117-2, and the temperature of the release layer forming composition. It can be measured at 25 ° C.
- a conical plate type (cone plate type) rotational viscometer is used as the viscometer, and preferably 1 ° 34 ′ ⁇ R24 is used as a standard cone rotor with the same type viscometer. It can be measured under the condition that the temperature of the product is 25 ° C.
- An example of such a rotational viscometer is TVE-25H manufactured by Toki Sangyo Co., Ltd.
- composition of the present invention may have various components in addition to the polyamic acid and the organic solvent.
- examples thereof include, but are not limited to, a crosslinking agent (hereinafter also referred to as a crosslinkable compound).
- crosslinkable compound examples include a compound containing two or more epoxy groups, a melamine derivative, a benzoguanamine derivative or glycoluril having a hydrogen atom of an amino group substituted with a methylol group, an alkoxymethyl group or both. However, it is not limited to these.
- crosslinkable compound examples include cyclohexene structures such as Epolide GT-401, Epolide GT-403, Epolide GT-301, Epolide GT-302, Celoxide 2021, Celoxide 3000 (manufactured by Daicel Corporation).
- Epoxy compound having: Epicoat 1001, Epicoat 1002, Epicoat 1003, Epicoat 1004, Epicoat 1007, Epicoat 1009, Epicoat 1010, Epicoat 828 (above, manufactured by Japan Epoxy Resin Co., Ltd.
- benzoguanamine derivative or glycoluril having a group in which the hydrogen atom of the amino group is substituted with a methylol group, an alkoxymethyl group, or both, an average of 3.7 methoxymethyl groups are substituted per triazine ring.
- MX-750 MW-30 substituted with an average of 5.8 methoxymethyl groups per triazine ring (above, manufactured by Sanwa Chemical Co., Ltd.); Cymel 300, Cymel 301, Cymel 303, Cymel 350, Methoxymethylated melamines such as Cymel 370, Cymel 771, Cymel 325, Cymel 327, Cymel 703, Cymel 712, and the like; Cymel 235, Cymel 236, Cymel 238, Cymel 212, Cymel 253, Cymel 254, and the like.
- base substrate examples include glass, plastic (polycarbonate, polymethacrylate, polystyrene, polyester, polyolefin, epoxy, melamine, triacetyl cellulose, ABS, AS, norbornene resin, etc.), metal (silicon wafer, etc.) Wood, paper, slate and the like.
- the coating method is not particularly limited, but for example, cast coating method, spin coating method, blade coating method, dip coating method, roll coating method, bar coating method, die coating method, ink jet method, printing method (letter plate) , Intaglio, lithographic, screen printing, etc.).
- thermal imidization in which the composition coated on the substrate is heated as it is, and a catalyst is added to the composition and heated.
- a catalyst is added to the composition and heated. Examples include catalytic imidization.
- the catalyst imidation of polyamic acid is performed by adding a catalyst to the release layer forming composition of the present invention and adjusting the catalyst addition composition by stirring, and then applying and heating the resin thin film (release layer). ) Is obtained.
- the amount of the catalyst is 0.1 to 30 mol times, preferably 1 to 20 mol times of the amic acid group.
- acetic anhydride and the like can be added as a dehydrating agent to the catalyst additive composition, and the amount thereof is 1 to 50 mol times, preferably 3 to 30 mol times of the amic acid group.
- a tertiary amine is preferably used as the imidization catalyst.
- pyridine substituted pyridines, imidazole, substituted imidazoles, picoline, quinoline, isoquinoline and the like are preferable.
- the heating temperature during thermal imidization and catalyst imidation is preferably 450 ° C. or lower. If it exceeds 450 ° C., the resulting resin thin film becomes brittle, and a resin thin film suitable for the intended use may not be obtained. Also, considering the heat resistance and linear expansion coefficient characteristics of the resulting resin thin film, after heating the applied composition at 50 ° C. to 100 ° C. for 5 minutes to 2 hours, the heating temperature is increased stepwise as it is. In addition, it is desirable to heat at over 375 ° C to 450 ° C for 30 minutes to 4 hours. In particular, the applied composition is heated at 50 ° C. to 100 ° C. for 5 minutes to 2 hours, then over 100 ° C. to 200 ° C.
- the appliance used for heating include a hot plate and an oven.
- the heating atmosphere may be under air or under an inert gas, and may be under normal pressure or under reduced pressure.
- the thickness of the resin thin film is usually about 0.01 to 10 ⁇ m, preferably about 0.05 to 5 ⁇ m.
- the thickness of the coating film before heating is adjusted to a desired thickness. A resin thin film is formed.
- the thin film described above is most suitable for use as a peeling layer for peeling without damaging a substrate applied to a flexible electronic device.
- a release layer provided between the flexible substrate applied to the flexible electronic device and the base substrate can be formed.
- a base substrate what contains glass or a silicone wafer is preferable, More preferably, glass is included.
- the release layer can be formed by applying the composition of the present invention to a glass substrate by a conventionally known technique and heating the obtained coating film at a predetermined temperature.
- a to-be-separated body layer can be formed on a peeling layer.
- the layer to be peeled may be a single layer or a plurality of layers. In order to fabricate various devices, it is realistic to have a plurality of layers.
- the layer immediately above the release layer depends on the release layer to be used, but it is preferable to use a layer having good peelability with the release layer, in other words, a layer having poor adhesion to the release layer to be used. Good.
- a method for manufacturing an object to be peeled is provided.
- the method a) a step of forming a release layer after applying the composition of the present application on a glass substrate; b) a step of forming an object to be peeled on the release layer; and c) a step of peeling the object to be peeled at the interface between the release layer and the object to be peeled; It is possible to obtain an object to be peeled.
- the “object to be peeled” may be a single layer or a plurality of layers.
- the release layer has good peelability, in other words, the adhesiveness to the release layer to be used is not good. There should be.
- a substrate structure applied to a flexible electronic device A base substrate; A release layer covering the base substrate in one or more regions, the release layer formed by the release layer forming composition according to the present invention; Including the base substrate and a flexible substrate covering the release layer; A substrate structure is provided in which the adhesive force between the flexible substrate and the release layer is greater than the adhesive force between the release layer and the base substrate.
- size of an adhesive force here can be confirmed by the crosscut test shown in the Example of this application, for example.
- BPDA 3,3′-4,4′-biphenyltetracarboxylic dianhydride.
- BA-TME 4,4-biphenylenebis (trimellitic acid monoester anhydride).
- PMDA pyromellitic dianhydride.
- IPHA isophthalaldehyde.
- Mw weight average molecular weight
- Mw molecular weight distribution of the polymer
- the temperature rising rate was 10 ° C./min.
- Cure condition C maintained at 80 ° C. for 10 minutes ⁇ temperature rise ⁇ 300 ° C. for 30 minutes ⁇ temperature rise ⁇ 400 ° C. for 30 minutes.
- the temperature rising rate was 10 ° C./min.
- the film thickness of the obtained coating film was measured using a contact-type film thickness measuring device (Dektak 3ST manufactured by ULVAC, Inc.).
- Table 1 shows the precursors of P1 to P7 used, the coated substrate, the curing conditions, and the film thickness of the produced release layer.
- ⁇ Cross cut test I> For the substrates provided with the release layers of Examples 1 to 5 and Comparative Examples 1 to 3 shown in Table 1, the adhesion of the substrate (glass or silicon wafer) / release layer was confirmed by cross-cut test I.
- the crosscut test I was performed as follows. (1) On the film, 100 1 mm squares were produced. (2) Thereafter, the above square was attached with an adhesive tape (cello tape (registered trademark)), and a peeling process was performed. (3) After the peeling step, the squares remaining on the substrate were counted.
- the characteristics of the components constituting the release layer, ie, (1) during heating, for the substrates provided with the release layers of Examples 1 to 5 and Comparative Examples 1 to 3 shown in Table 1 A temperature showing 1% weight loss in weight change of (2), (2) refractive index at a wavelength of 1000 nm, (3) birefringence at a wavelength of 1000 nm, and (4) surface energy were measured. The measurement conditions for each characteristic are shown below.
- thermogravimetric (TG) measurement was performed in a nitrogen atmosphere, and the temperature at which the weight decreased by 1% was determined.
- the refractive index and the birefringence were measured using a high-speed spectroscopic ellipsometer M-2000 (manufactured by JA Woollam Japan Co., Ltd.).
- the refractive index was an in-plane refractive index having a value of 1000 nm
- the birefringence was a difference between the in-plane refractive index and the out-of-plane refractive index.
- the surface energy of each member was measured using a fully automatic contact angle meter DM-701 (manufactured by Kyowa Interface Science Co., Ltd.).
- the solvent used for the measurement was water and methylene iodide, and was calculated from the contact angle of these solvents.
- a polyimide layer was formed as an object to be peeled on the release layer of the substrate provided with the release layer.
- the precursor P5 obtained in Synthesis Example 5 or Synthesis Example 1 is formed on the release layer of the substrate having the release layer of Examples 1 to 5 and Comparative Examples 1 to 3 shown in Table 1.
- P1 was applied with a bar coater. Then, maintain in an oven at 120 ° C. for 30 minutes ⁇ temperature increase ⁇ 180 ° C. for 20 minutes ⁇ temperature increase ⁇ 240 ° C./20 minute maintenance ⁇ temperature increase ⁇ 300 ° C. for 20 minutes ⁇ temperature increase ⁇ 400 ° C. for 20 minutes Maintenance ⁇ Temperature rise ⁇ Cure at 450 ° C. for 60 minutes (the speed was 10 ° C./min at any temperature rise) to produce a 15 ⁇ m-thick peeled layer made of polyimide.
- Crosscut Test II >> About the board
- the crosscut test II was performed in the same manner as the crosscut test I.
- Table 2 shows (1) a temperature indicating a 1% weight decrease in weight change during heating (indicated by “(1)” in Table 2), (2) a refractive index at a wavelength of 1000 nm (in Table 2, “ (2) ”, (3) difference between the refractive index and birefringence of (2) (indicated by“ (3) ”in Table 2), (4) surface energy (in Table 2, This is indicated by “(4)” (where the unit is dyne / cm), the polyimide precursor used in the peeled layer, and the results of cross-cut tests I and II.
- Table 2 shows the following.
- the peeling layer of Examples 1 to 5 since the result of Test I is 5B, the peeling layer is not peeled off from the substrate, while the result of Test II is AA. It turns out that only peels.
- the release layer formed from the composition for release layer of the present invention provides a desired release result.
- Comparative Example 1 and Comparative Example 3 show that the release layer peels from the substrate because the result of Test I is AA.
- Comparative Example 1 and Comparative Example 3 cannot obtain a desired peeling result.
- Comparative Example 2 since both Test I and Test II are 5B, neither the interface between the release layer and the substrate nor the interface between the release layer and the layer to be peeled is peeled off. It can be seen that cannot be obtained.
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Abstract
Description
そこで、樹脂フィルムを基板とした電子デバイスの製造方法が各種検討され始めており、新世代ディスプレイでは、既存のTFT設備を転用可能なプロセスで製造検討が進められている。
また、特許文献4は、特許文献1~3開示の技術を用いて被剥離層(特許文献4において「被転写層」と記載される)をプラスチックフィルムに貼りつけて液晶表示装置を完成させる方法を開示する。
具体的には、本発明の目的は、フレキシブル電子デバイスに適用される基板に損傷を与えることなく剥離させるための剥離層を形成するための組成物を提供することにある。
[式中、X1は、4価の有機基を表し、Y1は、下記の式(P)で表される2価の基を表す:
(式中、Rは、F、Cl、炭素数1~3のアルキル基、又はフェニル基を表し、mは、0~4の整数を表し、かつ、rは1~4の整数を表す)]。
(式中、
R1、R2、R3、R4、R5及びR6は、同一であっても異なっていてもよく、F、Cl、炭素数1~3のアルキル基、又はフェニル基を表し、
m1、m2、m3、m4、m5及びm6は、同一であっても異なっていてもよく、0~4の整数を表す)。
[式中、
X1は、前記<1>で定義されたとおりであり、Y2は、下記の式(P4)で表される基を表す:
(式中、
R7、及びR8は、同一であっても異なっていてもよく、F、Cl、炭素数1~3のアルキル基、又はフェニル基を表し、
R’は、水素原子、炭素数1~3のアルキル基、又はフェニル基を表し、 lは0~4の整数を表し、かつ
mは、前記<1>で定義されたとおりである)]。
(式中、Ra及びRbは同一であっても異なっていてもよく、炭素数1~4のアルキル基を表し、hは自然数を表す)。
ベース基板と、
1又は2以上の領域で、前記ベース基体を覆う剥離層であって、前記<1>~<9>のいずれかの剥離層形成用組成物により形成された剥離層と、
前記ベース基板と、前記剥離層を覆う、フレキシブル基板
とを含み、
前記フレキシブル基板と前記剥離層との密着力が、前記剥離層と前記ベース基体との密着力より大きいことを特徴とする、基板構造。
ベース基板を準備する工程、
1又は2以上の領域で、前記ベース基体を覆う剥離層を、前記<1>~<9>のいずれかの剥離層形成用組成物を用いて作製する工程、
前記ベース基板と、前記剥離層上に、フレキシブル基板を形成する工程
を含み、
前記フレキシブル基板と前記剥離層との密着力が、前記剥離層と前記ベース基体との密着力より大きいことを特徴とする、作製方法。
具体的には、本発明により、フレキシブル電子デバイスに適用される基板に損傷を与えることなく剥離させるための剥離層を形成するための組成物を提供することができる。
また、本発明により、上記効果に加えて、又は上記効果以外に、剥離層が設けられるガラス基板との密着性が維持されガラス基板との界面での剥離が生じない一方、剥離層より上部に形成される層又は層群を剥離層から簡易に剥離することができる、該剥離層を形成するための組成物を提供することにある。
本発明の剥離層形成用組成物は、前記したように、式(1)で表されるモノマー単位を50モル%以上含むポリアミック酸であって、その重量平均分子量が10,000以上であるポリアミック酸と、有機溶媒とを含むものである。
なお、炭素数1~3のアルキル基には、メチル、エチル、n-プロピル、およびi-プロピルが包含され、好ましくは、炭素数1~3のアルキル基は、メチルであり、より好ましくは、メチルである。
同様にこれら式において、m1、m2、m3、m4、m5及びm6は、同一であっても異なっていてもよく、0~4の整数を表し、好ましくは0~2を表し、より好ましくは0~1を表し、特に好ましくは0を表す。
R’は、水素原子、炭素数1~3のアルキル基、又はフェニル基を表し、好ましくは、水素原子、又は炭素数1~3のアルキル基を表し、より好ましくは、水素原子を表す。
さらに、l及びmは、同一であっても異なっていてもよく、0~4の整数を表し、好ましくは0~2を表し、より好ましくは0~1を表し、特に好ましくは0を表す。
すなわち、ピロメリット酸二無水物、3,3’,4,4’-ビフェニルテトラカルボン酸二無水物、3,3’,4,4’-ベンゾフェノンテトラカルボン酸二無水物、2,3,3’,4’-ビフェニルテトラカルボン酸二無水物、3,3’,4,4’-ジフェニルスルホンテトラカルボン酸二無水物、1,4,5,8-ナフタレンテトラカルボン酸二無水物、1,2,5,6-ナフタレンテトラカルボン酸二無水物、4,4’-オキシジフタル酸無水物、3,3’,4,4’-ジメチルジフェニルシランテトラカルボン酸二無水物、3,3’,4,4’-テトラフェニルシランテトラカルボン酸二無水物、1,2,3,4-フランテトラカルボン酸二無水物、4,4’-ビス(3,4-ジカルボキシフェノキシ)ジフェニルプロパン二無水物、4,4’-ヘキサフルオロイソプロピリデンジフタル酸無水物、パラフェニレンジフタル酸二無水物、2,2-ビス―((3,4-ジカルボキシフェニル)-ヘキサフルオロプロパン二無水物、9,9-ビス(3,4-ジカルボキシフェニル)フルオレン二無水物、9,9‘-ビス[4-(3,4-ジカルボキシフェノキシ)フェニル]フルオレン二無水物、3,3′,4,4′-ビフェニルエーテルテトラカルボン酸二無水物、2,3,5,6-ピリジンテトラカルボン酸二無水物、3,4,9,10-ペリレンテトラカルボン酸二無水物、4,4′-スルホニルジフタル酸二無水物、パラテルフェニル-3,4,3’,4’-テトラカルボン酸二無水物、メタテルフェニル-3,3’,4,4’-テトラカルボン酸二無水物、3,3′,4,4′-ジフェニルエーテルテトラカルボン酸二無水物、1,3-ビス(3,4-ジカルボキシフェニル)-1,1,3,3-テトラメチルジシロキサン二無水物、1-(2,3-ジカルボキシフェニル)-3-(3,4-ジカルボキシフェニル)-1,1,3,3-テトラメチルジシロキサン二無水物、3,3’,4,4’-ハイドロキノンジベンゾエートテトラカルボン酸二無水物、2,2’-ビス(4-ヒドロキシフェニル)プロパンジベンゾエート-3,3’,4,4’-テトラカルボン酸等が挙げられる。
(式中、R3は、芳香環を少なくとも1つ有する2価の有機基であり、好ましくは、フェニル、ビフェニル、ナフタレン骨格を有する基である)。
具体例としては、m-クレゾール、2-ピロリドン、N-メチル-2-ピロリドン、N-エチル-2-ピロリドン、N-ビニル-2-ピロリドン、N,N-ジメチルアセトアミド、N,N-ジメチルホルムアミド、3-メトキシ-N,N-ジメチルプロピルアミド、3-エトキシ-N,N-ジメチルプロピルアミド、3-プロポキシ-N,N-ジメチルプロピルアミド、3-イソプロポキシ-N,N-ジメチルプロピルアミド、3-ブトキシ-N,N-ジメチルプロピルアミド、3-sec-ブトキシ-N,N-ジメチルプロピルアミド、3-tert-ブトキシ-N,N-ジメチルプロピルアミド、γ-ブチロラクトン等のプロトン性溶剤等が挙げられる。これらは単独で又は2種以上を組み合わせて使用してもよい。
反応時間は、反応温度や原料物質の反応性に依存するため一概に規定できないが、通常1~100時間程度である。
希釈や濃縮に用いる溶媒は、特に限定されるものではなく、例えば、上記反応の反応溶媒の具体例と同様のものが挙げられ、それらは単独で又は2種以上を組み合わせて使用してもよい。
ここで、剥離層形成用組成物の粘度は、市販の液体の粘度測定用粘度計を使用して、例えば、JIS K7117-2に記載の手順を参照して、剥離層形成用組成物の温度25℃の条件にて測定することができる。好ましくは、粘度計としては、円錐平板型(コーンプレート型)回転粘度計を使用し、好ましくは同型の粘度計で標準コーンロータとして1°34‘×R24を使用して、剥離層形成用組成物の温度25℃の条件にて測定することができる。このような回転粘度計としては、例えば、東機産業株式会社製TVE-25Hが挙げられる。
エポキシ基を2個以上含有する化合物としては、エポリードGT-401、エポリードGT-403、エポリードGT-301、エポリードGT-302、セロキサイド2021、セロキサイド3000(以上、株式会社ダイセル製)等のシクロヘキセン構造を有するエポキシ化合物;エピコート1001、エピコート1002、エピコート1003、エピコート1004、エピコート1007、エピコート1009、エピコート1010、エピコート828(以上、ジャパンエポキシレジン株式会社製(現:三菱化学株式会社製、jER(登録商標)シリーズ))等のビスフェノールA型エポキシ化合物;エピコート807(ジャパンエポキシレジン株式会社製)等のビスフェノールF型エポキシ化合物;エピコート152、エピコート154(以上、ジャパンエポキシレジン株式会社製(現:三菱化学株式会社製、jER(登録商標)シリーズ))、EPPN201、EPPN202(以上、日本化薬株式会社製)等のフェノールノボラック型エポキシ化合物;ECON-102、ECON-103S、ECON-104S、ECON-1020、ECON-1025、ECON-1027(以上、日本化薬株式会社製)、エピコート180S75(ジャパンエポキシレジン株式会社(現:三菱化学株式会社製、jER(登録商標)シリーズ)製)等のクレゾールノボラック型エポキシ化合物;V8000-C7(DIC株式会社製)等のナフタレン型エポキシ化合物;デナコールEX-252(ナガセケムテックス株式会社製)、CY175、CY177、CY179、アラルダイトCY-182、アラルダイトCY-192、アラルダイトCY-184(以上、BASF社製)、エピクロン200、エピクロン400(以上、DIC株式会社製)、エピコート871、エピコート872(以上、ジャパンエポキシレジン株式会社製(現:三菱化学株式会社製、jER(登録商標)シリーズ))、ED-5661、ED-5662(以上、セラニーズコーティング株式会社製)等の脂環式エポキシ化合物;デナコールEX-611、デナコールEX-612、デナコールEX-614、デナコールEX-622、デナコールEX-411、デナコールEX-512、デナコールEX-522、デナコールEX-421、デナコールEX-313、デナコールEX-314、デナコールEX-312(以上、ナガセケムテックス株式会社製)等の脂肪族ポリグリシジルエーテル化合物が挙げられる。
また、得られる樹脂薄膜の耐熱性と線膨張係数特性を考慮すると、塗布した組成物を50℃~100℃で5分間~2時間加熱した後に、そのまま段階的に加熱温度を上昇させて最終的に375℃超~450℃で30分~4時間加熱することが望ましい。
特に、塗布した組成物は、50℃~100℃で5分間~2時間加熱した後に、100℃超~200℃で5分間~2時間、次いで、200℃超~375℃で5分間~2時間、最後に375℃超~450℃で30分~4時間加熱することが好ましい。
加熱に用いる器具は、例えばホットプレート、オーブン等が挙げられる。加熱雰囲気は、空気下であっても不活性ガス下であってもよく、また、常圧下であっても減圧下であってもよい。
また、被剥離体層は、剥離層上に形成することができる。被剥離体層は、一層であっても複数層であってもよい。種々のデバイスを作製するには、複数層であるのが現実的である。
被剥離体層のうち剥離層直上の層は、用いる剥離層に依存するが、該剥離層との剥離性を良いもの、換言すると用いる剥離層との密着性が良くないもの、を用いるのがよい。
該方法は、
a)本願の組成物をガラス基板上に塗布した後、剥離層を形成する工程;
b)該剥離層上に、被剥離体を形成する工程;及び
c)剥離層と被剥離体との界面において、被剥離体を剥離する工程;
を有することにより、被剥離体を得ることができる。
b)工程において、「被剥離体」は一層であっても複数層であってもよい。なお、「被剥離体」のうち剥離層直上の層は、用いる剥離層に依存するが、該剥離層との剥離性を良いもの、換言すると用いる剥離層との密着性が良くないもの、であるのがよい。
ベース基板と、
1又は2以上の領域で、前記ベース基体を覆う剥離層であって、本発明による剥離層形成用組成物により形成された剥離層と、
前記ベース基板と、前記剥離層を覆う、フレキシブル基板
とを含み、
前記フレキシブル基板と前記剥離層との密着力が、前記剥離層と前記ベース基体との密着力より大きいことを特徴とする、基板構造が提供される。ここでいう密着力の大きさは、例えば、本願の実施例で示したクロスカット試験により確認することができる。
<溶媒>
NMP:N-メチルピロリドン。
<アミン類>
p-PDA:p-フェニレンジアミン。
APAB:2-(3-アミノフェニル)-5-アミノベンズイミダゾール。
DATP:4,4’-ジアミノ-p-ターフェニル。
6FAP:2,2-ビス(3-アミノ-4-ヒドロキシフェニル)ヘキサフルオロプロパン。
BPDA:3,3’-4,4’-ビフェニルテトラカルボン酸二無水物。
BA-TME:4,4-ビフェニレンビス(トリメリット酸モノエステル酸無水物)。
PMDA:ピロメリット酸二無水物。
<アルデヒド>
IPHA:イソフタルアルデヒド。
ポリマーの重量平均分子量(以下「Mw」と略す)と分子量分布は、日本分光株式会社製GPC装置(Shodex(登録商標)カラムKF803LおよびKF805L)を用い溶出溶媒としてジメチルホルムアミドを流量1ml/分、カラム温度50℃の条件で測定した。なお、Mwはポリスチレン換算値とした。
<合成例1 ポリイミド前駆体P1の合成>
BPDA(98)//p-PDA(90)/DATP(10)
p-PDA 17.8g(0.164モル)、DATP 2.38g(0.009モル)、およびAPAB 2.05g(0.009モル)をNMP 425gに溶解させ、BPDA 52.8g(0.179モル)を同時に添加した後、再度NMP 7.4gを添加し、窒素雰囲気下中23℃、24時間反応させた。得られたポリイミド前駆体P1のMwは63000、分子量分布9.9であった。
BPDA(98)/ DATP(100)
DATP 30.8g(0.118モル)をNMP 425gに溶解させ、BPDA 34.1g(0.116モル)を同時に添加した後、再度NMP 10gを添加し、窒素雰囲気下中23℃、24時間反応させた。得られたポリイミド前駆体P2のMwは70700、分子量分布9.7であった。
PMDA(98)/p-PDA(80)/DATP(20)
p-PDA 20.261g(0.1875モル)とTPDA 12.206g(0.0469モル)をNMP 617.4gに溶解し、15℃に冷却後、PMDA 50.112g(0.2298モル)を添加し、窒素雰囲気下、50℃で48時間反応させた。得られたポリイミド前駆体P3のMwは82,100、分子量分布は2.7であった。
BP-TME(98)//p-PDA(95)/APAB(5)
p-PDA 9.66g(0.089モル)とAPAB 1.05g(0.005モル)をNMP 440gに溶解し、BP-TME 49.2g(0.092モル)を添加し、窒素雰囲気下、室温で24時間反応させた。得られたポリイミド前駆体P4のMwは57000、分子量分布は9.3であった。
BPDA(98)//p-PDA(100)
p-PDA 3.176g(0.02937モル)をNMP 88.2gに溶解し、BPDA 8.624g(0.02931モル)を添加した後、窒素雰囲気下、23℃で24時間反応させた。得られたポリイミド前駆体P5のMwは107,300、分子量分布4.6であった。
IHPA(98)//6FAP(100)
6FAP 3.18g(0.059モル)をNMP 70gに溶解し、IPHA 7.92g(0.060モル)を添加した後、窒素雰囲気下、23℃で24時間反応させた。得られたポリマーのMwは107,300、分子量分布4.6であった。
PMDA(98)//p-PDA(100)
p-PDA 10.078g(93mmol)をNMP 220.0gに溶解させた。得られた溶液に、PMDA 19.922g(91mmol)を加え、窒素雰囲気下、23℃で24時間反応させた。得られたポリマーのMwは55,900、分子量分布3.1であった。
上記合成例1~7で得たP1~P7をNMPにて4wt%に希釈し、100mm×100mmガラス基板(OA-10G無アルカリガラス)又はシリコンウエハ上にスピンコーターを用いて塗布した後、キュア条件A~Cで、オーブンで焼成し剥離層を作製した。
キュア条件A: 120℃で30分維持→昇温→300℃で60分維持→昇温→400℃で60分維持。なお、昇温速度は10℃/分であった。
キュア条件B: 120℃で30分維持→昇温→180℃で20分維持→昇温→240℃で20分維持→昇温→300℃で20分維持→昇温→400℃で20分維持→昇温→450℃で60分維持。なお、昇温速度は10℃/分であった。
キュア条件C: 80℃で10分維持→昇温→300℃で30分維持→昇温→400℃で30分維持。なお、昇温速度は10℃/分であった。
表1に、使用したP1~P7の前駆体、塗布基板、キュア条件、および作製した剥離層の膜厚を示す。
表1で示す実施例1~5及び比較例1~3の、剥離層を備えた基板について、クロスカット試験Iで、基板(ガラス又はシリコンウエハ)/剥離層の密着力を確認した。
クロスカット試験Iは、次のように行った。
(1)フィルム上に、1mm角の正方形を100個作製した。
(2)その後、粘着テープ(セロテープ(登録商標))で上記の正方形をはりつけ、剥離工程を行った。
(3)剥離工程後、基板に残存する、上記の正方形を数えた。
クロスカット試験の結果、剥離の程度を以下の指標で示す。
5B:剥離せず。
4B:5%以下の剥離。
3B:5~15%の剥離。
2B:15~35%の剥離。
1B:35~65%の剥離。
0B:65%~80%の剥離。
B:80%~95%の剥離。
A:95%~100%未満の剥離。
AA:100%の剥離。
ブルカー株式会社製 TD-DTA2000STを用いて、窒素雰囲気下で熱重量(TG)測定を行い、重量が1%減少する温度を求めた。
高速分光エリプソメーターM-2000(ジェー・エー・ウーラム・ジャパン株式会社製)を用いて、屈折率及び復屈折率を測定した。なお、屈折率は、1000nmの値の面内屈折率とし、複屈折率は、面内屈折率と面外屈折率の差とした。
全自動接触角計 DM-701(共和界面科学株式会社製)を用いて、各部材の表面エネルギーを測定した。なお、測定に用いた溶媒は、水とヨウ化メチレンであり、これらの溶媒の接触角から算出した。
実施例1~5及び比較例1~3の、剥離層を備えた基板上に被剥離体を形成し、その剥離の程度をクロスカット試験IIで確認した。
剥離層を備えた基板の該剥離層上に、被剥離体としてポリイミド層を形成した。
具体的には、表1に示す、実施例1~5及び比較例1~3の、剥離層を備える基板の、剥離層上に、上記合成例5又は合成例1で得られた前駆体P5又はP1をバーコーターで塗布した。その後、オーブンにて120℃で30分維持→昇温→180℃で20分維持→昇温→240℃/20分維持→昇温→300℃で20分維持→昇温→400℃で20分維持→昇温→450℃で60分維持(いずれの昇温においてもその速度は10℃/分であった)でキュアを行い、ポリイミドからなる膜厚15μmの被剥離体層を作製した。
上記で得られた、被剥離体層及び剥離層を備える基板について、被剥離体層/剥離層間の密着力をクロスカット試験IIで確認した。
クロスカット試験IIは、クロスカット試験Iと同様に行った。
表2に、(1)加熱時の重量変化における1%重量減少を示す温度(表2中、「(1)」で表記する)、(2)波長1000nmでの屈折率(表2中、「(2)」で表記する)、(3)該(2)の屈折率と複屈折との差(表2中、「(3)」で表記する)、(4)表面エネルギー(表2中、「(4)」で表記する。ただし、単位はdyne/cmである)、被剥離体層で用いたポリイミド前駆体、並びにクロスカット試験I及びIIの結果を示す。
**: 比較例1及び比較例3のクロスカット試験IIは、剥離層および基板との密着性が低いため、測定できなかった。
一方、比較例1及び比較例3は、試験Iの結果がAAであるため、剥離層が基板から剥離することがわかる。要するに、比較例1及び比較例3は、所望の剥離結果を得ることができないことがわかる。また、比較例2は、試験I及び試験IIが共に5Bであることから、剥離層と基板との界面においても、剥離層と被剥離体層との界面においても剥離せず、所望の剥離結果を得ることができないことがわかる。
Claims (14)
- 前記Y1が、少なくとも式(P1)で表される2価の基を含む、請求項2に記載の剥離層形成用組成物。
- 前記X1が、4価の芳香族基である、請求項1~4のいずれか一項に記載の剥離層形成用組成物。
- 前記4価の芳香族基が、ベンゼン骨格、ナフタレン骨格及びビフェニル骨格から選ばれる少なくとも1種を有する、請求項5に記載の組成物。
- 前記ポリアミック酸中の前記式(1)で表されるモノマー単位の含有量が60モル%以上である、請求項1~7のいずれか一項に記載の剥離層形成用組成物。
- ガラス基板直上に設ける剥離層を形成するため、請求項1~8のいずれか一項に記載の剥離層形成用組成物。
- フレキシブル電子デバイスに適用されるフレキシブル基板と、ベース基板との間に形成される剥離層であって、
請求項1~9のいずれか一項に記載の剥離層形成用組成物を用いて作製される、剥離層。 - フレキシブル電子デバイスに適用される基板構造であって、
ベース基板と、
1又は2以上の領域で、前記ベース基体を覆う剥離層であって、請求項1~9のいずれか一項に記載の剥離層形成用組成物により形成された剥離層と、
前記ベース基板と、前記剥離層を覆う、フレキシブル基板
とを含み、
前記フレキシブル基板と前記剥離層との密着力が、前記剥離層と前記ベース基体との密着力より大きいことを特徴とする、基板構造。 - ベース基板が、ガラスを含む、請求項11に記載の基板構造。
- 請求項1~9のいずれか一項に記載の剥離層形成用組成物を用いることを特徴とする、剥離層の製造方法。
- フレキシブル電子デバイスに適用される基板構造の作製方法であって、
ベース基板を準備する工程、
1又は2以上の領域で、前記ベース基体を覆う剥離層を、請求項1~9のいずれか一項に記載の剥離層形成用組成物を用いて作製する工程、
前記ベース基板と、前記剥離層上に、フレキシブル基板を形成する工程
を含み、
前記フレキシブル基板と前記剥離層との密着力が、前記剥離層と前記ベース基体との密着力より大きいことを特徴とする、作製方法。
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| WO2016140238A1 (ja) * | 2015-03-04 | 2016-09-09 | 日産化学工業株式会社 | 剥離層形成用組成物 |
| WO2016158990A1 (ja) * | 2015-03-31 | 2016-10-06 | 日産化学工業株式会社 | 剥離層形成用組成物及び剥離層 |
| WO2017204182A1 (ja) * | 2016-05-23 | 2017-11-30 | 日産化学工業株式会社 | 剥離層形成用組成物及び剥離層 |
| CN109196051A (zh) * | 2016-05-23 | 2019-01-11 | 日产化学株式会社 | 剥离层形成用组合物和剥离层 |
| KR20190011747A (ko) * | 2016-05-23 | 2019-02-07 | 닛산 가가쿠 가부시키가이샤 | 박리층 형성용 조성물 및 박리층 |
| JPWO2017204182A1 (ja) * | 2016-05-23 | 2019-04-11 | 日産化学株式会社 | 剥離層形成用組成物及び剥離層 |
| JPWO2017204178A1 (ja) * | 2016-05-23 | 2019-04-25 | 日産化学株式会社 | 剥離層形成用組成物及び剥離層 |
| KR102386514B1 (ko) | 2016-05-23 | 2022-04-14 | 닛산 가가쿠 가부시키가이샤 | 박리층 형성용 조성물 및 박리층 |
| JP2022116093A (ja) * | 2016-07-29 | 2022-08-09 | 株式会社半導体エネルギー研究所 | 剥離方法 |
| JPWO2018025955A1 (ja) * | 2016-08-03 | 2019-06-13 | 日産化学株式会社 | 剥離層形成用組成物 |
| WO2018025955A1 (ja) * | 2016-08-03 | 2018-02-08 | 日産化学工業株式会社 | 剥離層形成用組成物 |
| JP7135857B2 (ja) | 2016-08-03 | 2022-09-13 | 日産化学株式会社 | 剥離層形成用組成物 |
| WO2018124006A1 (ja) * | 2016-12-27 | 2018-07-05 | 日産化学工業株式会社 | 基板保護層形成用組成物 |
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| JP2019143143A (ja) | 2019-08-29 |
| KR102340689B1 (ko) | 2021-12-16 |
| JPWO2015152120A1 (ja) | 2017-04-13 |
| TWI690545B (zh) | 2020-04-11 |
| CN106133077B (zh) | 2018-11-06 |
| KR102467104B1 (ko) | 2022-11-14 |
| JP2019143144A (ja) | 2019-08-29 |
| JP6508574B2 (ja) | 2019-05-08 |
| KR20160142331A (ko) | 2016-12-12 |
| TW201927925A (zh) | 2019-07-16 |
| CN108690494A (zh) | 2018-10-23 |
| CN108690494B (zh) | 2021-04-06 |
| TW201610036A (zh) | 2016-03-16 |
| JP6775768B2 (ja) | 2020-10-28 |
| CN106133077A (zh) | 2016-11-16 |
| TWI690572B (zh) | 2020-04-11 |
| JP6775769B2 (ja) | 2020-10-28 |
| KR20210156292A (ko) | 2021-12-24 |
| TWI669356B (zh) | 2019-08-21 |
| KR20210154273A (ko) | 2021-12-20 |
| TW201927861A (zh) | 2019-07-16 |
| CN108690495A (zh) | 2018-10-23 |
| CN108690495B (zh) | 2021-05-25 |
| KR102467105B1 (ko) | 2022-11-14 |
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