WO2011132600A1 - 半導体デバイス貫通電極用のガラス基板 - Google Patents
半導体デバイス貫通電極用のガラス基板 Download PDFInfo
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- WO2011132600A1 WO2011132600A1 PCT/JP2011/059317 JP2011059317W WO2011132600A1 WO 2011132600 A1 WO2011132600 A1 WO 2011132600A1 JP 2011059317 W JP2011059317 W JP 2011059317W WO 2011132600 A1 WO2011132600 A1 WO 2011132600A1
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- glass substrate
- hole
- excimer laser
- semiconductor device
- laser light
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/12—Mountings, e.g. non-detachable insulating substrates
- H01L23/14—Mountings, e.g. non-detachable insulating substrates characterised by the material or its electrical properties
- H01L23/15—Ceramic or glass substrates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/48—Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the groups H01L21/18 - H01L21/326 or H10D48/04 - H10D48/07
- H01L21/4803—Insulating or insulated parts, e.g. mountings, containers, diamond heatsinks
- H01L21/4807—Ceramic parts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
- H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
- H01L23/498—Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers
- H01L23/49827—Via connections through the substrates, e.g. pins going through the substrate, coaxial cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
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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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
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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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
- Y10T428/24298—Noncircular aperture [e.g., slit, diamond, rectangular, etc.]
Definitions
- the present invention relates to a glass substrate for semiconductor device through electrodes.
- multilayer printed circuit boards in which a plurality of printed circuit boards are stacked have been developed.
- a fine through-hole having a diameter of about 100 ⁇ m or less called a via hole is formed in a resin insulating layer, and plating is performed on the inside thereof, and a conductive layer between printed circuit boards stacked vertically. Connect each other electrically.
- Patent Documents 1 and 2 describe a method of irradiating an insulating layer with laser light through a mask in which a large number of through openings are formed. According to this method, since a plurality of through holes can be simultaneously formed in the resin insulating layer, the through holes (via holes) can be formed more easily.
- Non-Patent Document 1 describes that a glass substrate having a plurality of through holes can be used as such an insulating layer.
- the hole density of the through holes in the glass substrate for semiconductor device through electrodes is expected to increase further in the future. If such a tendency continues, the strength of the glass substrate further decreases, and therefore the problem of cracking at the outer peripheral portion of the through hole as described above may become more prominent.
- This invention is made
- the present invention provides the following glass substrate for semiconductor device through electrodes.
- a glass substrate for a semiconductor device through-electrode having a first surface and a second surface, and having a through hole extending from the first surface to the second surface, At least one of said 1st and 2nd surface is chemically strengthened, The glass substrate for semiconductor device penetration electrodes characterized by the above-mentioned.
- the glass substrate according to (1) or (2), wherein the thickness of the chemically strengthened layer on the chemically strengthened surface is in the range of 1 ⁇ m to 30 ⁇ m.
- FIG. 1 shows a cross-sectional view of a conventional glass substrate for semiconductor device through electrodes.
- a conventional glass substrate 1 for a semiconductor device through electrode has a first surface 1a and a second surface 1b. Further, the glass substrate 1 has a through hole 5. This through hole 5 penetrates from the first surface 1a of the glass substrate 1 to the second surface 1b.
- the through-hole 5 is filled with a conductive substance, and this conductive substance is used as, for example, electrodes for semiconductor devices and elements installed on the top and bottom of the glass substrate 1. Moreover, the glass substrate 1 has a role which insulates between semiconductor devices.
- the glass substrate 1 can be used as a substrate for a semiconductor device through electrode.
- the hole density of the through holes in the glass substrate for semiconductor device through electrodes tends to increase further in the future. If such a tendency continues, the strength of the glass substrate further decreases, and the problem of cracking at the outer peripheral portion of the opening of the through hole as described above may become more prominent.
- a glass substrate for a semiconductor device through electrode according to the present invention (hereinafter also simply referred to as “glass substrate of the present invention”) has a first surface and a second surface, It has a through hole extending from the surface to the second surface, and at least one of the first and second surfaces is chemically strengthened.
- the term “chemical strengthening” means that the alkali metal constituting the surface of the glass substrate is ion-exchanged with another alkali metal having a higher atomic number on the surface of the glass substrate. Note that this is a generic term for technologies that apply compressive stress to the surface.
- the glass substrate of the present invention having such characteristics, compressive stress is applied to the chemically strengthened surface, so that the outer peripheral portion R of the opening of the above-described through-hole 5 is compared with the conventional glass substrate.
- the strength at is improved. Therefore, in the present invention, the problem of cracks and cracks as described above is suppressed or reduced, and a glass substrate having higher strength than the conventional glass substrate can be obtained.
- FIG. 2 schematically shows an example of a cross-sectional view of a glass substrate according to the present invention.
- the glass substrate 100 has a first surface 110a and a second surface 110b. Further, the glass substrate 100 has a through hole 150. The through-hole 150 penetrates from the first opening 180a provided in the first surface 110a of the glass substrate 100 to the second opening 180b provided in the second surface 110b.
- the first surface 110a and / or the second surface 110b has the chemically strengthened layers 115a and / or 115b formed by chemically strengthening the glass substrate 100. It has the characteristics.
- the thickness of the chemically strengthened layers 115a and 115b is not limited to this, but is, for example, in the range of 1 ⁇ m to 30 ⁇ m, and preferably in the range of 5 ⁇ m to 25 ⁇ m.
- it is required to deepen the chemical strengthening layer in order to apply a large surface compressive stress.
- the chemical strengthening treatment is carried out deeply, the entire glass will be ion-exchanged. In that case, since the surface compressive stress does not increase, the chemically strengthened layers 115a and 115b are preferably not too deep.
- the chemically strengthened layers 115a and 115b are too thick, the internal tensile stress becomes too large, and the brittleness of the glass substrate 100 may be reduced. On the other hand, if it is too thin, the effect of the chemical strengthening treatment may not be sufficiently obtained.
- the glass substrate 100 of the present invention preferably has a surface compressive stress on the chemically strengthened surface (110a and / or 110b) of 500 MPa or more, particularly 650 MPa or more. If the surface compressive stress is less than 500 MPa, the effect of sufficient chemical strengthening treatment may not be obtained.
- the surface compressive stress of the glass substrate and the thickness of the chemically strengthened layer can be easily measured by a surface stress meter such as a surface stress meter FSM-6000 manufactured by Orihara Seisakusho.
- the glass substrate 100 of the present invention usually has a thickness in the range of 0.01 mm to 5 mm. This is because when the thickness of the glass substrate is thicker than 5 mm, it takes time to form the through holes, and when it is less than 0.01 mm, problems such as cracks occur during processing.
- the thickness of the glass substrate 100 of the present invention is more preferably 0.02 to 3 mm, and further preferably 0.02 to 1 mm. In particular, the thickness of the glass substrate 100 of the present invention is particularly preferably 0.05 mm or more and 0.4 mm or less.
- the glass substrate 100 of the present invention contains 40 wt% or more of SiO 2 .
- the SiO 2 content may be in the range of 55 wt% to 75 wt%, for example. If the SiO 2 content is higher than this, there is a high possibility that cracks will occur on the back surface of the glass substrate when the through holes are formed.
- Other components are not particularly limited, and for example, an arbitrary combination of Al 2 O 3 , MgO, CaO, Na 2 O, K 2 O, ZrO 2 and the like can be used.
- the glass substrate 100 of the present invention has a plurality of through holes 150.
- Each through-hole 150 may be circular.
- the diameter of the through-hole 150 varies depending on the use of the glass substrate 100 of the present invention, but in general, it is preferably in the range of 5 ⁇ m to 500 ⁇ m.
- the diameter of the through hole 150 is more preferably 0.01 mm to 0.2 mm when the glass substrate 100 of the present invention is used as the insulating layer of the multilayer circuit board as described above. More preferably, it is 0.02 mm to 0.1 mm.
- WLP wafer level package
- the diameter of the through hole 150 for taking in air is more preferably 0.1 to 0.5 mm, and further preferably 0.2 to 0.4 mm. Further, in this case, the diameter of the through hole 150 for taking out the electrode different from the air hole is more preferably 0.01 to 0.2 mm, and further preferably 0.02 to 0.1 mm.
- the diameter of the through hole 150 is more preferably 0.005 to 0.075 mm, and 0.01 to 0.05 mm. More preferably.
- the diameter of the first opening 180a of the circular through hole 150 may be different from the diameter of the second opening 180b.
- the “diameter of the through-hole 150” means the larger diameter of the openings 180a and 180b.
- the ratio (ds / dl) between the larger diameter (dl) and the smaller diameter (ds) is preferably 0.2 to 0.99, more preferably 0.5 to 0.90. preferable.
- the number density of the through holes 150 varies depending on the use of the glass substrate 100 of the present invention, the general range of 0.1 or / mm 2 ⁇ 10,000 pieces / mm 2 It is.
- the number density of the through holes 150 is in the range of 3 / mm 2 to 10,000 / mm 2. And more preferably in the range of 25 / mm 2 to 100 / mm 2 .
- the number density of the through holes 150 is 1 / It is preferably mm 2 to 25 pieces / mm 2 , and more preferably 2 pieces / mm 2 to 10 pieces / mm 2 .
- the number density of the through holes 150 is more preferably 0.1 piece / mm 2 to 1,000 pieces / mm 2. More preferably, it is 0.5 pieces / mm 2 to 500 pieces / mm 2 .
- the glass substrate 100 of the present invention preferably has an absorption coefficient with respect to the wavelength of excimer laser light of 3 cm ⁇ 1 or more. In this case, the formation of the through hole 150 becomes easier.
- the content of iron (Fe) in the glass substrate 100 is preferably 20 mass ppm or more, and more preferably 0.01 mass% or more. 0.03 mass% or more is more preferable, and 0.05 mass% or more is particularly preferable.
- the Fe content is preferably 0.2% by mass or less, and more preferably 0.1% by mass or less.
- the cross-sectional area of the through hole may be monotonously decreased from the first opening toward the second opening. This feature will be described with reference to FIG.
- FIG. 3 shows an example of a cross-sectional view of another glass substrate in the present invention.
- the glass substrate 200 has a first surface 210a and a second surface 210b. Further, the glass substrate 200 has a through hole 250. The through hole 250 penetrates from the first opening 280a provided in the first surface 210a of the glass substrate 200 to the second opening 280b provided in the second surface 210b. In FIG. 3, it should be noted that the chemical strengthening layer is omitted for clarity.
- the diameter of the first opening 280a of the through hole 250 is L1, and the diameter of the second opening 280b is L2.
- the through hole 250 has a “taper angle” ⁇ .
- the taper angle ⁇ means an angle formed between the normal line (dotted line in the figure) of the first surface 210a (and the second surface 210b) of the glass substrate 200 and the wall surface 270 of the through hole 250.
- the angle formed between the normal line of the glass substrate 200 and the right wall surface 270a of the through hole 250 is ⁇ .
- the normal line of the glass substrate 200 and the left surface 270b of the through hole are shown.
- the angle formed by and is the taper angle ⁇ . Normally, the right taper angle ⁇ and the left taper angle ⁇ have substantially the same value.
- the taper angle ⁇ is preferably in the range of 0.1 ° to 20 °.
- the wire is promptly moved from the first surface 210a side of the glass substrate 200 to the inside of the through hole 250. It becomes possible to insert. This also makes it possible to more easily and reliably connect the conductive layers of the printed circuit boards stacked above and below the glass substrate 200 through the through holes 250 of the glass substrate 200.
- the taper angle ⁇ is particularly preferably in the range of 0.5 ° to 10 °.
- the taper angle ⁇ can be arbitrarily adjusted.
- the taper angle ⁇ of the through hole of the glass substrate can be obtained as follows: Obtaining the diameter L1 of the through hole 250 in the opening 280a on the first surface 210a side of the glass substrate 200; Obtaining a diameter L2 of the through hole 250 in the opening 280b on the second surface 210b side of the glass substrate 200; Determining the thickness of the glass substrate 200; Assuming that the taper angle ⁇ is uniform in the entire through-hole 250, the taper angle ⁇ is calculated from the measured value.
- the glass substrate of the present invention is suitably used for applications such as semiconductor device members, more specifically, insulating layers of multilayer circuit boards, wafer level packages, through holes for electrode extraction, interposers and the like.
- FIG. 4 shows an example of a production apparatus configuration diagram used when producing the glass substrate of the present invention.
- the manufacturing apparatus 400 includes an excimer laser light generator 410, a mask 430, and a stage 440.
- a plurality of mirrors 450 to 451 and a homogenizer 460 are disposed between the excimer laser beam generator 410 and the mask 430.
- another mirror 452 and a projection lens 470 are disposed between the mask 430 and the stage 440.
- the mask 430 may be made of, for example, a metal plate having a through opening.
- a material for the metal plate for example, chromium (Cr), stainless steel, or the like is used. In this case, the laser light incident on the mask 430 is emitted through the through opening.
- the mask 430 has a configuration in which, for example, a reflective layer pattern is disposed on a base material (transparent base material) transparent to laser light. Accordingly, in the mask 430, the portion where the reflective layer is provided on the transparent substrate can block the laser light, and the portion where the reflective layer is not provided can transmit the laser light.
- a glass substrate 420 to be processed is disposed on the stage 440.
- the glass substrate 420 can be moved to an arbitrary position by moving the stage 440 two-dimensionally or three-dimensionally.
- the excimer laser light 490 generated from the excimer laser light generation apparatus 410 passes through the first mirror 450, the homogenizer 460, and the second mirror 451 and is incident on the mask 430.
- the excimer laser beam 490 is adjusted to a laser beam with uniform intensity when it passes through the homogenizer 460.
- the mask 430 has a reflective layer pattern on a substrate transparent to laser light. Therefore, the excimer laser beam 490 is emitted from the mask 430 in a pattern corresponding to the pattern of the reflective layer (more specifically, the portion where the reflective layer is not installed).
- the direction of the laser beam 490 transmitted through the mask 430 is adjusted by the third mirror 452, reduced and projected by the projection lens 470, and is incident on the glass substrate 420 indicated on the stage 440.
- a plurality of through holes are simultaneously formed in the glass substrate 420 by the laser light 490.
- the glass substrate 420 may be moved on the stage 440 and then the excimer laser beam 490 may be irradiated again to the glass substrate 420. Thereby, a desired through hole can be formed in a desired portion of the surface of the glass substrate 420. That is, in this method, a known step-and-repeat method can be applied.
- the projection lens 470 can irradiate the entire processing region on the surface of the glass substrate 420 with the excimer laser beam 490 to form a through hole at a time.
- the excimer laser beam 490 that has passed through the mask 430 is reduced and projected by the projection lens 470, thereby increasing the irradiation fluence of the excimer laser beam 490 on the surface of the glass substrate 420 and forming a through hole. Ensure irradiation fluence.
- the cross-sectional area of the excimer laser light 490 on the surface of the glass substrate 420 is 1/10 with respect to the cross-sectional area of the excimer laser light 490 immediately after passing through the mask 430. If so, the irradiation fluence can be increased 10 times.
- FIG. 5 schematically shows an example of the flow of the method for producing a glass substrate of the present invention.
- the manufacturing method of the glass substrate of the present invention comprises: (1) preparing a glass substrate (step S110); (2) placing the glass substrate on the optical path of the excimer laser light from the excimer laser light generator (step S120); (3) placing a mask on the optical path between the excimer laser light generator and the glass substrate (step S130); (4) A step of irradiating the excimer laser light on the glass substrate along the optical path from the excimer laser light generator, whereby the through hole is formed in the glass substrate (step) S140) (5) A step of chemically strengthening the obtained glass substrate having through holes (step S150); Have
- a glass substrate is prepared.
- the preferred composition of the glass substrate is as described above.
- the glass substrate preferably contains 40 wt% or more of SiO 2 and has a glass transition temperature in the range of 400 ° C. to 700 ° C. Further, those having an average thermal expansion coefficient at 50 ° C. to 350 ° C. in the range of 20 ⁇ 10 ⁇ 7 / K to 100 ⁇ 10 ⁇ 7 / K are preferable.
- the glass substrate is disposed on an optical path of excimer laser light from the excimer laser light generator. As shown in FIG. 4, the glass substrate 420 may be disposed on the stage 440.
- the excimer laser beam 490 emitted from the excimer laser beam generator 410 can be used as long as the oscillation wavelength is 250 nm or less. From the viewpoint of output, a KrF excimer laser (wavelength 248 nm), an ArF excimer laser (193 nm), or an F 2 excimer laser (wavelength 157 nm) is preferable. From the viewpoint of handling and glass absorption, an ArF excimer laser is more preferable.
- the pulse width of the excimer laser beam 490 is preferably 100 nsec or less, more preferably 50 nsec or less, and further preferably 30 nsec or less.
- the irradiation fluence of excimer laser beam 490 is preferably 1 J / cm 2 or more, and more preferably 2 J / cm 2 or more. If the irradiation fluence of the excimer laser beam 490 is too low, ablation cannot be induced and it becomes difficult to form a through hole in the glass substrate. On the other hand, when the irradiation fluence of the excimer laser beam 490 exceeds 20 J / cm 2 , cracks and cracks tend to occur in the glass substrate.
- the preferable range of the irradiation fluence of the excimer laser beam 490 varies depending on the wavelength region of the excimer laser beam 490 used, the type of glass substrate to be processed, and the like, but in the case of a KrF excimer laser (wavelength 248 nm), 2 to 20 J / cm. 2 is preferable. In the case of an ArF excimer laser (wavelength 193 nm), it is preferably 1 to 15 J / cm 2 .
- the value of the irradiation fluence of the excimer laser beam 490 means the value on the surface of the glass substrate to be processed. Moreover, such irradiation fluence shall mean the value measured using the energy meter on the processing surface.
- Step S130 Next, a mask 430 is disposed between the excimer laser light generator 410 and the glass substrate 420.
- the mask 430 is made of, for example, a metal plate having a through opening.
- a material for the metal plate for example, chromium (Cr), stainless steel, or the like is used.
- the mask 430 may be configured by forming a reflective layer pattern on a transparent substrate.
- the material of the transparent substrate is not particularly limited as long as it is transparent to the laser beam 490.
- the material of the transparent substrate may be, for example, synthetic quartz, fused quartz, Pyrex (registered trademark), soda lime glass, alkali-free glass, borosilicate glass, or the like.
- the material of the reflective layer is not particularly limited as long as it has a property of efficiently blocking the laser beam 490.
- the reflective layer may be made of a metal such as chromium, silver, aluminum, and / or gold, for example.
- the size of the mask 430 and the shape and arrangement of the reflective layer pattern of the mask 430 are not particularly limited.
- Step S140 excimer laser light 490 is irradiated from the excimer laser light generator 410 to the glass substrate 420 through the mask 430.
- Excimer laser beam 490 is applied to glass substrate 420 so that the product of irradiation fluence (J / cm 2 ), number of shots (times) and glass substrate thickness (mm) is 1,000 to 30,000. It is preferable to do.
- this range depends on the type and properties of the glass substrate 420 (particularly estimated to be related to the glass transition temperature Tg), it is more preferably about 1,000 to 20,000, more preferably 2,000 to 15,000. More preferably, it is 3,000 to 10,000. This is because when the product of the irradiation fluence and the number of shots is within such a range, cracks are less likely to be formed.
- the irradiation fluence is preferably 1 to 20 J / cm 2 .
- the taper angle ⁇ tends to be small. Conversely, when the irradiation fluence is small, the taper angle ⁇ tends to increase. Therefore, by adjusting the irradiation fluence, a glass substrate having a through hole having a desired taper angle ⁇ can be obtained.
- the taper angle ⁇ may be in the range of 0.1 ° to 20 °.
- the size of a semiconductor circuit fabrication wafer is usually about 6 to 8 inches.
- the processing area on the surface of the glass substrate is usually about several mm square. Accordingly, in order to irradiate the entire region desired to be processed on the glass substrate 420 with the excimer laser light, it is necessary to move the excimer laser light or move the glass substrate 420 after processing at one place is completed. If anything, it is preferable to move the glass substrate 420 with respect to the excimer laser light. This is because there is no need to drive the optical system.
- debris may be generated. Moreover, when this debris accumulates inside the through hole, the quality and processing rate of the processed glass substrate may deteriorate. Therefore, debris may be removed by suction or blowing off simultaneously with laser irradiation to the glass substrate.
- Step S150 Next, the obtained glass substrate having through holes is subjected to chemical strengthening treatment.
- the conditions for the chemical strengthening treatment are not particularly limited.
- potassium nitrate (KNO 3), or potassium nitrate in a molten salt containing potassium salt of nitrate, etc. as a main component (KNO 3) by immersing the glass substrate may be subjected to chemical strengthening treatment.
- sodium (Na) and / or lithium (Li) on the glass substrate surface is ion-exchanged with potassium (K), and chemical strengthening of the glass substrate surface becomes possible.
- the processing temperature and the processing time are not particularly limited.
- the treatment temperature may be in the range of 350 ° C. to 500 ° C.
- the processing time may be in the range of 1 hour to 12 hours.
- the processing temperature is relatively low as 400 ° C. to 450 ° C., and the processing time is 1 to 4 hours. It is preferable to make it relatively short.
- a chemically strengthened layer is formed on the surface of the glass substrate.
- the thickness of the chemical strengthening layer is, for example, in the range of 1 ⁇ m to 30 ⁇ m.
- the glass substrate for forming a semiconductor device through electrode according to the present invention can be manufactured.
- Example 1 A glass substrate having a plurality of through holes is manufactured by the following procedure using the manufacturing apparatus shown in FIG.
- a plate-like glass is manufactured by the following procedure.
- SiO 2 is 72.8 wt%
- Al 2 O 3 is 1.9 wt%
- MgO is 3.7 wt%
- CaO is 8.1 wt%
- Na 2 O is 13.1 wt%
- K 2 O is 0.3 wt%.
- 1 kg of raw material powder is weighed and mixed so that it becomes%.
- sodium sulfate is added to this raw material powder so that it becomes 0.4 wt% in terms of SO 3 .
- the raw material powder is put into a platinum crucible and held at 1600 ° C. for 3 hours to melt the mixed powder.
- the melt is degassed and homogenized, and then the melt is poured into a mold. Thereafter, the mold is gradually cooled to obtain a glass sample.
- the obtained glass sample is cut and ground so as to be 100 mm long ⁇ 100 mm wide ⁇ 0.3 mm thick. Furthermore, a glass sample is mirror-finished to obtain a glass substrate for processing.
- the density of this glass substrate is 2.49 g / cm 3 and the Young's modulus is about 73 GPa.
- the average thermal expansion coefficient of the glass substrate at 50 ° C. to 350 ° C. is 88 ⁇ 10 ⁇ 7 / K.
- the glass transition temperature is 540 ° C. and the strain point is 528 ° C.
- the density is based on the Archimedes method, the Young's modulus is based on the bending resonance method, the glass transition temperature and the average thermal expansion coefficient at 50 ° C. to 350 ° C. are based on the differential thermal expansion meter (TMA), and the strain point is based on JIS-R3103. Measured by fiber elongation method.
- an excimer laser light generator 410 is disposed.
- LPX Pro 305 manufactured by Coherent
- This apparatus is capable of generating ArF excimer laser light having a maximum pulse energy of 0.6 J, a repetition frequency of 50 Hz, a pulse width of 25 ns, a generation beam size of 10 mm ⁇ 24 mm, and an oscillation wavelength of 193 nm.
- the glass substrate 420 produced by the above-described method is placed on the stage 440.
- FIG. 6 schematically shows the configuration of the mask 430 used.
- the used mask 430 has a through-opening array portion 435 in a part of the first surface 434 of a stainless steel substrate 432 having a length of 30 mm ⁇ width of 30 mm and a thickness of 0.5 mm. is there.
- the array portion 435 of the through-opening is installed in a substantially central region of the first surface 434 of the stainless steel substrate 432.
- the array part 435 of the through openings has an array pattern in which circular through openings 437 having a diameter of 0.4 mm are two-dimensionally arranged vertically and horizontally.
- the through openings 437 are arranged at a pitch of 0.6 mm in both the vertical and horizontal directions, with 16 pieces arranged vertically and 40 pieces arranged horizontally.
- the through-opening 437 can transmit ArF excimer laser light.
- the other regions of the mask 430 reflect the ArF excimer laser light.
- the projection lens 470 is disposed between the mask 430 and the glass substrate 420.
- the projection lens 470 is a lens having a focal length of 100 mm, the distance from the mask 430 on the optical path is 1100 mm, and the distance from the processing surface of the glass substrate 420 (the surface not in contact with the stage 440) is 110 mm.
- the irradiation fluence of excimer laser light 490 on the processed surface of glass substrate 420 is measured with an energy meter.
- the irradiation fluence is about 11 J / cm 2 at the maximum including the reduction due to the loss of the beam transmission system and the improvement due to the beam reduction.
- Excimer laser light 490 is irradiated onto the processed surface of the glass substrate 420 using such a manufacturing apparatus.
- the laser light 190 is adjusted with an attenuator so that the irradiation fluence on the processed surface of the glass substrate 420 becomes 7 J / cm 2 .
- the stage is moved by a predetermined amount, and the same operation is repeated each time. Thereby, many through-holes are formed in the area
- the density of the through holes is 289 / cm 2 .
- chemical strengthening treatment is performed on both the first surface and the second surface using the obtained glass substrate.
- the chemical strengthening treatment is carried out by immersing the glass substrate in a melt of potassium nitrate at 400 ° C. in the atmosphere for 480 minutes.
- the thickness of a chemical strengthening layer is measured about the obtained glass substrate.
- a surface stress meter (FSM-6000) manufactured by Orihara Seisakusho is used.
- the thickness of the chemically strengthened layers formed on both surfaces of the glass substrate is about 10 ⁇ m.
- the surface compression stress of the obtained glass substrate is measured.
- a surface stress meter (FSM-6000) manufactured by Orihara Seisakusho is used.
- the surface compressive stress on both surfaces is about 660 MPa.
- Example 1 In the column of “Example 1” in Table 2, the thickness of the chemically strengthened layer of the glass substrate according to Example 1 and the surface compressive stress are shown together.
- a chemically strengthened layer having a thickness of about 10 ⁇ m is formed, whereby a glass substrate having a surface compressive stress of 500 MPa or more is obtained.
- a glass substrate having a surface compressive stress of 500 MPa or more is obtained.
- the occurrence of cracks and cracks can be significantly suppressed even when used as a substrate material for a semiconductor device through electrode.
- Example 2 In the same manner as in Example 1, a glass substrate having a large number of through holes is manufactured, and chemical strengthening treatment is further performed on the glass substrate.
- Example 2 the composition of the plate-like glass is SiO 2 60.9 wt%, Al 2 O 3 9.6 wt%, MgO 7.0 wt%, Na 2 O 11.7 wt%, K 2 O 5.9 wt%, and ZrO 2 was 4.8 wt%. CaO is not added.
- Other manufacturing conditions for the plate-like glass are the same as in Example 1.
- the resulting glass substrate has a density of 2.52 g / cm 3 and a Young's modulus of about 78 GPa.
- the average thermal expansion coefficient of the glass substrate at 50 ° C. to 350 ° C. is 91 ⁇ 10 ⁇ 7 / K.
- the glass transition temperature is 620 ° C. and the strain point is 578 ° C.
- the laser processing conditions and chemical strengthening conditions for the glass substrate are the same as in Example 1. However, in this example 2, the time for the chemical strengthening treatment (the time for immersing the glass substrate in molten KNO 3 ) is 90 minutes.
- Example 2 the thickness and surface compressive stress of the chemically strengthened layer are measured. The results are shown in the column “Example 2” in Table 2 above.
- the thickness of the chemically strengthened layer is 15 ⁇ m on both surfaces. Moreover, the surface compressive stress of the obtained glass substrate is about 850 MPa in any surface.
- the glass substrate having such a large surface compressive stress can significantly suppress the occurrence of cracks and cracks even when used as a substrate material for a semiconductor device through electrode.
- Example 3 In the same manner as in Example 1, a glass substrate having a large number of through holes is manufactured, and chemical strengthening treatment is further performed on the glass substrate.
- the composition of the plate-like glass is SiO 2 62.2 wt%, Al 2 O 3 17.2 wt%, MgO 3.9 wt%, CaO 0.6 wt%, Na 2 O 12.8 wt%, and K 2. O3.5 wt%. ZrO 2 is not added.
- Other manufacturing conditions for the plate-like glass are the same as in Example 1.
- Example 3 the composition and various characteristics of the glass substrate are collectively shown.
- the density of the obtained glass substrate is 2.46 g / cm 3 and the Young's modulus is about 73 GPa.
- the average thermal expansion coefficient of the glass substrate at 50 ° C. to 350 ° C. is 93 ⁇ 10 ⁇ 7 / K.
- the glass transition temperature is 595 ° C., and the strain point is 553 ° C.
- the laser processing conditions and chemical strengthening conditions for the glass substrate are the same as in Example 1. However, in this example 3, the time for the chemical strengthening treatment (the time for immersing the glass substrate in molten KNO 3 ) is 120 minutes.
- Example 3 the thickness and surface compressive stress of the chemically strengthened layer were measured. The results are shown in the column “Example 3” in Table 2 above.
- the thickness of the chemically strengthened layer is 20 ⁇ m on both surfaces. Moreover, the surface compressive stress of the obtained glass substrate is about 750 MPa in any surface.
- the glass substrate having such a large surface compressive stress can significantly suppress the occurrence of cracks and cracks even when used as a substrate material for a semiconductor device through electrode.
- the present invention can be used for a semiconductor device member, more specifically, a glass substrate suitably used for applications such as an insulating layer of a multilayer circuit board, a wafer level package, a through hole for extracting an electrode, an interposer and the like.
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Abstract
Description
(1)第1の表面と第2の表面とを有し、前記第1の表面から前記第2の表面まで延在する貫通孔を有する、半導体デバイス貫通電極用のガラス基板であって、
前記第1および第2の表面の少なくとも一方は、化学強化されていることを特徴とする半導体デバイス貫通電極用のガラス基板。
(2)厚さが0.01mm~5mmの範囲にあることを特徴とする(1)に記載のガラス基板。
(3)前記化学強化された表面における化学強化層の厚さは、1μm~30μmの範囲であることを特徴とする(1)または(2)に記載のガラス基板。
(4)表面圧縮応力は、500MPa以上であることを特徴とする(1)乃至(3)のいずれか一つに記載のガラス基板。
(5)SiO2の含有量が55wt%~75wt%の範囲であることを特徴とする(1)乃至(4)のいずれか一つに記載のガラス基板。
(6)前記貫通孔の前記第1の表面における孔密度は、0.1個/mm2~10,000個/mm2の範囲であることを特徴とする(1)乃至(5)のいずれか一つに記載のガラス基板。
(7)前記貫通孔は、0.1゜~20゜のテーパ角を有するテーパ形状を有することを特徴とする(1)乃至(6)のいずれか一つに記載のガラス基板。
ガラス基板200の第1の表面210a側の開口280aにおける貫通孔250の直径L1を求める;
ガラス基板200の第2の表面210b側の開口280bにおける貫通孔250の直径L2を求める;
ガラス基板200の厚さを求める;
貫通孔250全体において、テーパ角αは、均一であると仮定して、上記測定値から、テーパ角αが算出される。
次に、図4を参照して、前述のような特徴を有する本発明のガラス基板の製造方法について、説明する。
(1)ガラス基板を準備するステップ(ステップS110)と、
(2)前記ガラス基板を、エキシマレーザ光発生装置からのエキシマレーザ光の光路上に配置するステップ(ステップS120)と、
(3)前記エキシマレーザ光発生装置と、前記ガラス基板との間の前記光路上に、マスクを配置するステップ(ステップS130)と、
(4)前記エキシマレーザ光発生装置から、前記光路に沿って前記ガラス基板に、前記エキシマレーザ光を照射するステップであって、これにより、前記ガラス基板に前記貫通孔が形成されるステップ(ステップS140)と、
(5)得られた貫通孔を有するガラス基板を化学強化処理するステップ(ステップS150)と、
を有する。
最初に、ガラス基板が準備される。ガラス基板の好ましい組成等は、前述の通りである。ガラス基板は、40wt%以上のSiO2を含み、ガラス転移温度が400℃~700℃の範囲にあるものが好ましい。また、50℃~350℃における平均熱膨張係数が20×10-7/K~100×10-7/Kの範囲にあるものが好ましい。
次に、前記ガラス基板は、エキシマレーザ光発生装置からのエキシマレーザ光の光路上に配置される。図4に示したように、ガラス基板420は、ステージ440上に配置されても良い。
次に、前記エキシマレーザ光発生装置410と、前記ガラス基板420との間に、マスク430が配置される。
次に、マスク430を介して、エキシマレーザ光発生装置410からガラス基板420に、エキシマレーザ光490が照射される。
次に、得られた貫通孔を有するガラス基板は、化学強化処理される。
図4に示した製造装置を用いて、以下の手順で、複数の貫通孔を有するガラス基板を製造する。
初めに、以下の手順で、板状のガラスを製作する。
次に、得られたガラス基板について、化学強化層の厚さを測定する。測定には、折原製作所社製の表面応力計(FSM-6000)を使用する。測定の結果、ガラス基板の両表面に形成された化学強化層の厚さは、いずれも約10μmである。
例1と同様の方法で、多数の貫通孔を有するガラス基板を製作し、さらにこのガラス基板に化学強化処理を実施する。
例1と同様の方法で、多数の貫通孔を有するガラス基板を製作し、さらにこのガラス基板に化学強化処理を実施する。
本出願は、2010年4月20日出願の日本特許出願2010-097225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。
1a 第1の表面
1b 第2の表面
5 貫通孔
100 本発明のガラス基板
110a 第1の表面
110b 第2の表面
115a、115b 化学強化層
150 貫通孔
180a 第1の開口
180b 第2の開口
200 別のガラス基板
210a 第1の表面
210b 第2の表面
250 貫通孔
270 貫通孔の壁面
280a 第1の開口
280b 第2の開口
α テーパ角
L1 貫通孔の第1の開口の直径
L2 貫通孔の第2の開口の直径
400 製造装置
410 エキシマレーザ光の発生装置
420 ガラス基板
430 マスク
432 ステンレス鋼基板
434 第1の表面
435 貫通開口の配列部
437 貫通開口
440 ステージ
450~452 ミラー
460 ホモジナイザー
470 投影レンズ
490 エキシマレーザ光
Claims (7)
- 第1の表面と第2の表面とを有し、前記第1の表面から前記第2の表面まで延在する貫通孔を有する、半導体デバイス貫通電極用のガラス基板であって、
前記第1および第2の表面の少なくとも一方は、化学強化されていることを特徴とする半導体デバイス貫通電極用のガラス基板。 - 厚さが0.01mm~5mmの範囲にあることを特徴とする請求項1に記載のガラス基板。
- 前記化学強化された表面における化学強化層の厚さは、1μm~30μmの範囲であることを特徴とする請求項1または2に記載のガラス基板。
- 表面圧縮応力は、500MPa以上であることを特徴とする請求項1乃至3のいずれか一つに記載のガラス基板。
- SiO2を55wt%~75wt%の範囲で含有することを特徴とする請求項1乃至4のいずれか一つに記載のガラス基板。
- 前記貫通孔の前記第1の表面における孔密度は、0.1個/mm2~10,000個/mm2の範囲であることを特徴とする請求項1乃至5のいずれか一つに記載のガラス基板。
- 前記貫通孔は、0.1゜~20゜のテーパ角を有するテーパ形状を有することを特徴とする請求項1乃至6のいずれか一つに記載のガラス基板。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP11771935A EP2562805A1 (en) | 2010-04-20 | 2011-04-14 | Glass substrate for semiconductor device via |
| KR1020127026584A KR20130059325A (ko) | 2010-04-20 | 2011-04-14 | 반도체 디바이스 관통 전극용 유리 기판 |
| CN2011800195606A CN102844857A (zh) | 2010-04-20 | 2011-04-14 | 半导体器件贯通电极用的玻璃基板 |
| JP2012511632A JPWO2011132600A1 (ja) | 2010-04-20 | 2011-04-14 | 半導体デバイス貫通電極用のガラス基板 |
| US13/650,391 US20130034688A1 (en) | 2010-04-20 | 2012-10-12 | Glass substrate for forming through-substrate via of semiconductor device |
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| JP2010-097225 | 2010-04-20 | ||
| JP2010097225 | 2010-04-20 |
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| US13/650,391 Continuation US20130034688A1 (en) | 2010-04-20 | 2012-10-12 | Glass substrate for forming through-substrate via of semiconductor device |
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| JP (1) | JPWO2011132600A1 (ja) |
| KR (1) | KR20130059325A (ja) |
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| JP2010097225A (ja) | 2007-10-04 | 2010-04-30 | Menicon Co Ltd | 眼用レンズ用着色剤、眼用レンズ用材料、眼用レンズの製造方法および眼用レンズ |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7226654B2 (en) * | 2003-07-29 | 2007-06-05 | Kyocera Corporation | Laminated wiring board and its mounting structure |
| JP2009158522A (ja) * | 2007-12-25 | 2009-07-16 | Kyocera Corp | 配線基板およびその製造方法 |
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2011
- 2011-04-14 WO PCT/JP2011/059317 patent/WO2011132600A1/ja not_active Ceased
- 2011-04-14 KR KR1020127026584A patent/KR20130059325A/ko not_active Withdrawn
- 2011-04-14 CN CN2011800195606A patent/CN102844857A/zh active Pending
- 2011-04-14 EP EP11771935A patent/EP2562805A1/en not_active Withdrawn
- 2011-04-14 JP JP2012511632A patent/JPWO2011132600A1/ja not_active Withdrawn
- 2011-04-20 TW TW100113788A patent/TW201201334A/zh unknown
-
2012
- 2012-10-12 US US13/650,391 patent/US20130034688A1/en not_active Abandoned
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|---|---|---|---|---|
| JP2003020257A (ja) * | 2001-07-04 | 2003-01-24 | Hitachi Ltd | 配線基板および半導体装置及びそれらの製造方法 |
| WO2003007379A1 (en) * | 2001-07-12 | 2003-01-23 | Hitachi, Ltd. | Electronic circuit component |
| JP2002126886A (ja) | 2001-08-24 | 2002-05-08 | Sumitomo Heavy Ind Ltd | レーザ穴あけ加工装置 |
| JP2003152337A (ja) * | 2001-11-19 | 2003-05-23 | Kyocera Corp | 多層配線基板の製造方法 |
| JP2003238249A (ja) * | 2002-02-19 | 2003-08-27 | Kyocera Corp | ガラスセラミックス並びに配線基板 |
| JP2005088045A (ja) | 2003-09-17 | 2005-04-07 | Sumitomo Heavy Ind Ltd | レーザ穴あけ方法及び装置 |
| JP2010097225A (ja) | 2007-10-04 | 2010-04-30 | Menicon Co Ltd | 眼用レンズ用着色剤、眼用レンズ用材料、眼用レンズの製造方法および眼用レンズ |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2880686A1 (en) * | 2012-08-03 | 2015-06-10 | Qualcomm Mems Technologies, Inc. | Incorporation of passives and fine pitch through via for package on package |
| US10115671B2 (en) | 2012-08-03 | 2018-10-30 | Snaptrack, Inc. | Incorporation of passives and fine pitch through via for package on package |
| US9396969B2 (en) | 2014-02-20 | 2016-07-19 | Aisin Seiki Kabushiki Kaisha | Glasswork component, manufacturing method thereof, and manufacturing method of electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2562805A1 (en) | 2013-02-27 |
| JPWO2011132600A1 (ja) | 2013-07-18 |
| US20130034688A1 (en) | 2013-02-07 |
| KR20130059325A (ko) | 2013-06-05 |
| TW201201334A (en) | 2012-01-01 |
| CN102844857A (zh) | 2012-12-26 |
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