WO2022097472A1 - 粘着テープ及び加工方法 - Google Patents
粘着テープ及び加工方法 Download PDFInfo
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- WO2022097472A1 WO2022097472A1 PCT/JP2021/038724 JP2021038724W WO2022097472A1 WO 2022097472 A1 WO2022097472 A1 WO 2022097472A1 JP 2021038724 W JP2021038724 W JP 2021038724W WO 2022097472 A1 WO2022097472 A1 WO 2022097472A1
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- Prior art keywords
- adhesive tape
- adhesive layer
- polymer
- pressure
- tape according
- Prior art date
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- 125000001972 isopentyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])C([H])([H])* 0.000 description 1
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000001421 myristyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 239000000025 natural resin Substances 0.000 description 1
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- GJYXGIIWJFZCLN-UHFFFAOYSA-N octane-2,4-dione Chemical compound CCCCC(=O)CC(C)=O GJYXGIIWJFZCLN-UHFFFAOYSA-N 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 229950000688 phenothiazine Drugs 0.000 description 1
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 description 1
- OXNIZHLAWKMVMX-UHFFFAOYSA-N picric acid Chemical compound OC1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O OXNIZHLAWKMVMX-UHFFFAOYSA-N 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- UIIIBRHUICCMAI-UHFFFAOYSA-N prop-2-ene-1-sulfonic acid Chemical compound OS(=O)(=O)CC=C UIIIBRHUICCMAI-UHFFFAOYSA-N 0.000 description 1
- AAYRWMCIKCRHIN-UHFFFAOYSA-N propane-1-sulfonic acid;prop-2-enamide Chemical compound NC(=O)C=C.CCCS(O)(=O)=O AAYRWMCIKCRHIN-UHFFFAOYSA-N 0.000 description 1
- DHGFMVMDBNLMKT-UHFFFAOYSA-N propyl 3-oxobutanoate Chemical compound CCCOC(=O)CC(C)=O DHGFMVMDBNLMKT-UHFFFAOYSA-N 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010421 standard material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000001544 thienyl group Chemical group 0.000 description 1
- YRHRIQCWCFGUEQ-UHFFFAOYSA-N thioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3SC2=C1 YRHRIQCWCFGUEQ-UHFFFAOYSA-N 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- 125000002889 tridecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
- C09J4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/10—Homopolymers or copolymers of methacrylic acid esters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/14—Esterification
-
- 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/62—Polymers of compounds having carbon-to-carbon double bonds
- C08G18/6216—Polymers of alpha-beta ethylenically unsaturated carboxylic acids or of derivatives thereof
- C08G18/622—Polymers of esters of alpha-beta ethylenically unsaturated carboxylic acids
- C08G18/6225—Polymers of esters of acrylic or methacrylic acid
-
- 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/62—Polymers of compounds having carbon-to-carbon double bonds
- C08G18/6216—Polymers of alpha-beta ethylenically unsaturated carboxylic acids or of derivatives thereof
- C08G18/625—Polymers of alpha-beta ethylenically unsaturated carboxylic acids; hydrolyzed polymers of esters of these acids
- C08G18/6258—Polymers of alpha-beta ethylenically unsaturated carboxylic acids; hydrolyzed polymers of esters of these acids the acid groups being esterified with polyhydroxy compounds or epoxy compounds during or after polymerization
-
- 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/80—Masked polyisocyanates
- C08G18/8003—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen
- C08G18/8006—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/32
- C08G18/8009—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/32 with compounds of C08G18/3203
- C08G18/8022—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/32 with compounds of C08G18/3203 with polyols having at least three hydroxy groups
- C08G18/8029—Masked aromatic polyisocyanates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/08—Homopolymers or copolymers of acrylic acid esters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/385—Acrylic polymers
-
- 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
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L21/6835—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
- H01L21/6836—Wafer tapes, e.g. grinding or dicing support tapes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/326—Applications of adhesives in processes or use of adhesives in the form of films or foils for bonding electronic components such as wafers, chips or semiconductors
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
- C09J2301/416—Additional features of adhesives in the form of films or foils characterized by the presence of essential components use of irradiation
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/50—Additional features of adhesives in the form of films or foils characterized by process specific features
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2433/00—Presence of (meth)acrylic polymer
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2221/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof covered by H01L21/00
- H01L2221/67—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere
- H01L2221/683—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L2221/68304—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
- H01L2221/68327—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support used during dicing or grinding
Definitions
- the present invention relates to an adhesive tape and a processing method.
- a semiconductor wafer hereinafter, also referred to as an adherend
- an adherend a tape for processing a semiconductor wafer is attached to the adherend, and the adherend is temporarily fixed at the time of dicing. This makes it possible to prevent chip skipping during individualization. Further, after dicing, the semiconductor wafer processing tape is expanded, and the individualized adherend is picked up (peeled) from the semiconductor wafer processing tape.
- an adhesive tape in which an adhesive layer that cures by irradiation with ultraviolet rays is coated on a film substrate having transparency to ultraviolet rays is mainly used.
- the pressure-sensitive adhesive layer is irradiated with ultraviolet rays after dicing to promote the curing reaction, so that the adhesive strength of the pressure-sensitive adhesive layer can be reduced. You can easily pick up your body.
- the adherend that has been separated into individual pieces is pushed up by the push-up pin from the back surface that is not in contact with the adherend of the adhesive tape, and the pickup is performed.
- the adhesive residue on the adherend can be reduced and the adhesive tape can be picked up in high yield even at a low pin height.
- the adhesive cannot follow the steps of the adherend and air bubbles enter. Then, when irradiated with ultraviolet rays, the adhesive may be poorly cured due to oxygen inhibition or the like, and the adhesive may remain on the adherend without being cured. In addition, if the adhesive force to the adherend is insufficient, cutting water may infiltrate between the adherend and the adhesive tape during dicing to contaminate the adherend, or even individualized adherends may be formed. It scatters.
- the thickness of the pressure-sensitive adhesive layer may be increased in order to supplement the wettability of the pressure-sensitive adhesive to the adherend, or the adhesive strength may be increased by blending a low-molecular-weight component or a pressure-sensitive adhesive, or the elastic modulus of the pressure-sensitive adhesive layer. It is conceivable to reduce the pressure and increase the adhesive strength. However, in this case, the pressure-sensitive adhesive may be melted by the frictional heat generated by the rotation of the blade during dicing and scraped up, so that the pressure-sensitive adhesive dust adheres to the adherend.
- the adhesive is cured by irradiation with ultraviolet rays while it is being scooped up, the individualized adherend will be fixed to the adhesive tape, making it difficult to pick up at low pin height, or even if it can be picked up.
- the adhesive itself may be destroyed because it cannot be peeled off at the interface with the adherend, and the adhesive may remain on the adherend.
- Patent Document 1 As a means for solving such adhesive residue and improving pick-up property, for example, as in Patent Document 1, a large amount of a relatively low molecular weight ultraviolet curable resin component is blended to significantly increase the adhesive strength after ultraviolet irradiation. Methods of lowering are disclosed.
- the adhesive becomes too hard after UV irradiation, which may cause the adhesive to not withstand the deformation of the tape at the time of pickup and crack into the shape of a pin, which may cause adhesive residue.
- the present invention has been made in view of the above problems, and provides an adhesive tape that does not easily leave adhesive residue on the adherend at the time of picking up and can be picked up with a low pin height, and a processing method using the same. With the goal.
- the present inventors have diligently studied the adhesive design of the adhesive tape in order to solve the above problems. As a result, they have found that the above problems can be solved by adjusting the tensile elastic modulus and the elongation at break of the pressure-sensitive adhesive layer after UV curing, and have completed the present invention.
- the adhesive tape according to the present invention is as follows. [1] It has a base material layer and an adhesive layer provided on the base material layer.
- the pressure-sensitive adhesive layer contains a photoradical initiator and a polymer A having a polymerizable carbon double bond.
- the tensile elastic modulus of the pressure-sensitive adhesive layer after irradiation with ultraviolet rays is 400 MPa or less.
- the volume shrinkage of the pressure-sensitive adhesive layer before and after UV curing is 0.50 to 10.0%.
- the 180 ° peel strength of the adhesive layer to the silicon wafer before UV curing is 2.0 to 20.0 N / 20 mm at 23 ° C. Moreover, the 180 ° peel strength of the adhesive layer after UV curing with respect to the silicon wafer is 0.05 to 1.0 N / 20 mm at 23 ° C.
- the double bond equivalent of the polymer A is 500 to 2500 g / mol.
- the polymer A has a hydroxyl group.
- the weight average molecular weight of the polymer A is 1.0 ⁇ 105 to 2.0 ⁇ 106 .
- the isocyanate-based compound contains a bifunctional or higher functional isocyanate-based compound.
- the adhesive tape according to [10].
- [12] For processing semiconductor wafers, semiconductor devices, and various semiconductor packages, The adhesive tape according to any one of [1] to [11].
- [13] The bonding step of bonding the adhesive tape according to any one of [1] to [12] and the adherend. It has a dicing step of processing the adherend in a state where the adhesive tape and the adherend are bonded to each other.
- the adherend is a semiconductor wafer, a semiconductor device, or various semiconductor packages. Processing method.
- an adhesive tape that is less likely to leave adhesive residue on the adherend at the time of pickup and can be picked up with a low pin height, and a processing method using the same.
- the present embodiment will be described in detail, but the present invention is not limited thereto, and various modifications can be made without departing from the gist thereof. Is.
- the adhesive tape of the present embodiment has a base material layer and a pressure-sensitive adhesive layer provided on the base material layer, and the pressure-sensitive adhesive layer has a photoradical initiator and a polymerizable carbon double bond.
- the tensile elasticity of the pressure-sensitive adhesive layer after irradiation with ultraviolet rays is 400 MPa or less, and the elongation at break of the pressure-sensitive adhesive layer after irradiation with ultraviolet rays is 16% or more.
- the conventional pressure-sensitive adhesive layer is composed of, for example, a base polymer having no UV curability and a low molecular weight component having UV curability. Therefore, low molecular weight components and polymer components that remain unreacted after UV irradiation may remain on the surface of the adherend.
- the polymers A are further polymerized by ultraviolet irradiation and crosslinked with each other. Therefore, it is possible to avoid the problem that the low molecular weight component contaminates the surface of the adherend, and even if a part of the polymerizable carbon double bond of the polymer A is unreacted, it is compared with the low molecular weight component. It is also possible to avoid contamination of the surface of the adherend.
- the low molecular weight component can also be bonded to the polymer A, so that it easily stays in the pressure-sensitive adhesive and is prevented from remaining on the surface of the adherend. can do.
- the mechanical properties of the pressure-sensitive adhesive layer containing the polymer A after ultraviolet irradiation that is, the tensile elastic modulus and the elongation at break are further defined.
- the chip can be peeled off while the pressure-sensitive adhesive layer is evenly stretched from all four sides of the chip at the time of pickup.
- the chip can be peeled off from the pressure-sensitive adhesive layer with a small force, and the chip can be easily peeled off even if the pin height is low.
- the cured adhesive material is stretched and can be stretched without breaking, so that the cured adhesive material around it is restrained by the recesses of the chip. It can be separated as a unit, leading to a reduction in adhesive residue.
- the tensile elastic modulus of the pressure-sensitive adhesive layer after irradiation with ultraviolet rays is 400 MPa or less, preferably 350 MPa or less, more preferably 300 MPa or less, still more preferably 150 MPa or less, still more preferably 100 MPa or less, and further. More preferably, it is 50 MPa or less.
- the lower limit of the tensile elastic modulus is not particularly limited, but is preferably 1.0 MPa or more, and may be 3.0 MPa or more.
- the tensile elastic modulus of the adhesive layer after UV irradiation is 400 MPa or less, it is possible to pick up with a lower pin height. Further, if the tensile elastic modulus of the pressure-sensitive adhesive layer after irradiation with ultraviolet rays is larger than 400 MPa, the pressure-sensitive adhesive layer after the curing reaction proceeds by irradiation with ultraviolet rays is too hard. There is a possibility that pick-up failure will occur because the peeling does not start. Further, if the pin height is set too high in this case, the pin may break through the adhesive layer and damage the adhesive tape, or the adhesive layer may crack and remain on the chip.
- the "tensile elastic modulus" described in the present specification is a tensile speed of 5 mm / by a universal tensile tester under a temperature condition of 23 ° C. using a pressure-sensitive adhesive cut out to a width of 1 cm, a length of 10 cm, and a thickness of 60 to 110 ⁇ m. Young's modulus measured at min and a distance between chucks of 50 mm.
- the elongation at break of the pressure-sensitive adhesive layer after irradiation with ultraviolet rays is 16% or more, preferably 22% or more, more preferably 25% or more, still more preferably 35% or more, still more preferably 45. % Or more, and even more preferably 55% or more.
- the upper limit of the tensile elastic modulus is not particularly limited, but is preferably 200% or less, and may be 90% or less.
- the breaking elongation rate of the adhesive layer after UV irradiation is 16% or more, it is possible to pick up with a lower pin height. Further, if the breaking elongation rate of the pressure-sensitive adhesive layer after irradiation with ultraviolet rays is less than 16%, the pressure-sensitive adhesive layer after the curing reaction proceeds by irradiation with ultraviolet rays is too hard. Chip peeling does not start, and pickup failure may occur. Further, if the pin height is set too high in this case, the pin may break through the adhesive layer and damage the adhesive tape, or the adhesive layer may crack and remain on the chip.
- break elongation rate is a tensile speed of 5 mm / by a universal tensile tester under a temperature condition of 23 ° C. using a pressure-sensitive adhesive cut out to a width of 1 cm, a length of 10 cm, and a thickness of 60 to 110 ⁇ m. It is a breaking elongation rate when measured at min and a distance between chucks of 50 mm.
- the volume shrinkage of the pressure-sensitive adhesive layer after UV irradiation is preferably 0.50 to 10.0%, more preferably 0.70 to 8.0%, with the volume before UV irradiation as 100%. More preferably, it is 0.90 to 5.0%.
- the volume shrinkage of the pressure-sensitive adhesive layer after irradiation with ultraviolet rays is 0.50% or more, the pressure-sensitive adhesive layer is sufficiently cured by irradiation with ultraviolet rays, and the contact area between the adhesive tape and the adherend is reduced. Therefore, the adhesive strength is reduced, and the peeling tends to be easier.
- the volume shrinkage rate is 10.0% or less, it tends to be possible to suppress excessive curing of the cured product of the pressure-sensitive adhesive layer. Therefore, the adhesive layer cannot withstand the deformation of the adhesive tape due to the push-up of the pin at the time of picking up, and tends to be suppressed from cracking in the shape of the pin and causing adhesive residue.
- volume shrinkage described in the present specification is determined by measuring the specific gravity before and after curing by the in-liquid weighing method (balance method) in accordance with the "measurement method of solid density and specific gravity (JIS Z 8807)".
- the curing shrinkage rate was obtained from the change in specific gravity.
- the calculation of the volume shrinkage is shown below.
- Volume shrinkage rate r ⁇ (ds-dl) / dl ⁇ x100 Relative density before curing: dl, specific density after curing: ds
- the 180 ° peel strength S 0 of the pressure-sensitive adhesive layer on the silicon wafer before irradiation with ultraviolet rays is preferably 2.0 to 20.0 N / 20 mm, more preferably 4.0 to 16.0 N / 20 mm at 23 ° C. Yes, more preferably 6.0 to 14.0 N / 20 mm.
- the adhesive strength before irradiation with ultraviolet rays tends to be more excellent. Therefore, the adhesive tape is less likely to come off from the ring frame, and chip skipping and chip chipping are less likely to occur in the dicing process.
- the 180 ° peel strength S 0 is 20.0 N / 20 mm or less, the tackiness is small, so that the adhesive is less likely to be scraped off by the blade in the dicing step, and the scraped adhesive is applied to the adherend. It tends to be difficult to adhere to the side surface or the like. As a result, the scraped up adhesive remains on the adherend as adhesive residue, or the chip is fixed by UV curing as it is, resulting in pick-up failure or chipping of the fixed chip. It tends to be more suppressed.
- the 180 ° peel strength S 1 of the pressure-sensitive adhesive layer on the silicon wafer after irradiation with ultraviolet rays is preferably 0.05 to 1.0 N / 20 mm, more preferably 0.08 to 0.8 N / 20 mm at 23 ° C. Yes, more preferably 0.10 to 0.6 N / 20 mm.
- the 180 ° peel strength S 1 When the 180 ° peel strength S 1 is 0.05 N / 20 mm or more, it tends to be more suppressed that the chip is peeled or misaligned due to expansion at the time of pickup. That is, it tends to be more suppressed that the tip is peeled off or misaligned before being pushed up by the pin. As a result, the expand allows the individualized chips to be kept open at equal intervals, and the device can accurately recognize and pick up the chips. Further, when the 180 ° peel strength S 1 is 1.0 N / 20 mm or less, the chip is easily peeled from the pressure-sensitive adhesive layer, and the pick-up property tends to be further improved.
- both the 180 ° peel strength S 0 and the 180 ° peel strength S 1 are satisfied.
- the "180 ° peel strength with respect to a silicon wafer" described in the present specification can be measured according to the method for measuring the adhesive strength of JIS Z0237 (2009). Specifically, when the adhesive layer is crimped to the adherend (silicon wafer) whose surface has been washed using a crimping device (roller mass 2 kg) and peeled off at 180 ° to the adherend. The adhesive strength is measured with a universal tensile tester in an environment of a temperature of 23 ° C. and a humidity of 50%.
- the pressure-sensitive adhesive layer contains a photoradical initiator and A having a polymerizable carbon double bond, and may contain a curing agent, if necessary.
- the polymer A is a polymer having a polymerizable carbon double bond, and is a component constituting the main component of the pressure-sensitive adhesive layer.
- the photoradical initiator When the pressure-sensitive adhesive layer is irradiated with ultraviolet rays, the photoradical initiator generates radicals, whereby the polymerizable carbon double bonds of the polymer A are polymerized.
- the polymers A After the irradiation with ultraviolet rays, the polymers A are in a state of being crosslinked with each other.
- the polymer A is not particularly limited, and examples thereof include (meth) acrylic acid ester-based copolymers having a polymerizable double bond.
- the shape of the (meth) acrylic acid ester-based copolymer is not particularly limited, and examples thereof include a linear shape, a branched shape, and a crosslinked shape. Among these, it is preferable to have a crosslinked shape.
- the polymer A having a crosslinked shape or a branched shape may be one in which a part of the polymerizable double bond of the polymer A having a linear shape is bonded by aging or the like.
- the monomer of the (meth) acrylic acid ester constituting the (meth) acrylic acid ester-based copolymer is not particularly limited, and is, for example, a methyl group, an ethyl group, an n-pulpyl group, an isopulpyl group, or n-butyl.
- Alkyl (meth) acrylates having a linear or branched alkyl group such as a lauryl group, a tridecyl group, a tetradecyl group, a stearyl group, an octadecyl group, and a dodecyl group. These alkyl (meth) acrylates may be used alone or in combination of two or more.
- the monomer component other than the above alkyl (meth) acrylate is not particularly limited, but for example, acrylic acid, methacrylic acid, carboxyethyl (meth) acrylate, carboxypentyl (meth) acrylate, itaconic acid, maleic acid, and fumaric acid.
- carboxyl group-containing monomers such as crotonic acid; acid anhydride monomers such as maleic anhydride and itaconic acid anhydride; 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, (meth) acrylic acid.
- Hydroxyl group-containing monomers such as methylcyclohexyl) methyl (meth) acrylate; styrene sulfonic acid, allylsulfonic acid, 2- (meth) acrylamide-2-methylpropanesulfonic acid, (meth) acrylamide propanesulfonic acid, sulfopropyl (meth)
- examples thereof include sulfonic acid group-containing monomers such as acrylate and (meth) acryloyloxynaphthalene sulfonic acid; and phosphate group-containing monomers such as 2-hydroxyethylacryloyl phosphate, preferably 2-ethylhexyl (meth) acrylate and methacrylic acid. It is a copolymer of. These other monomers may be used alone or in combination of two or more.
- a (meth) acrylic acid ester-based copolymer containing an alkyl (meth) acrylate and a carboxyl group-containing monomer and a (meth) acrylic acid ester-based copolymer containing an alkyl (meth) acrylate and a hydroxyl group-containing monomer.
- a (meth) acrylic acid ester-based copolymer containing an alkyl (meth) acrylate and a carboxyl group-containing monomer a (meth) acrylic acid ester-based copolymer containing an alkyl (meth) acrylate and a hydroxyl group-containing monomer.
- the method for introducing the polymerizable double bond into the (meth) acrylic acid ester-based copolymer is not particularly limited, and for example, the carboxyl group of the carboxyl group-containing monomer, the anhydrous carboxyl group of the acid anhydride monomer, or the hydroxyl group is contained. Examples thereof include a method in which a modifier having a polymerizable double bond is reacted with the hydroxyl group of the monomer.
- an ester bond is formed in the carboxyl group-containing monomer unit.
- a polymerizable double bond can be introduced through.
- a (meth) acrylic acid ester-based copolymer containing a carboxyl group-containing monomer unit is reacted with an isocyanate-based compound having a polymerizable double bond as a modifier to contain a carboxyl group.
- a polymerizable double bond can be introduced into the monomer unit via an amide bond.
- the modifier is not particularly limited as long as it has a functional group that reacts with the functional group of the (meth) acrylic acid ester-based copolymer and has a polymerizable double bond, and is, for example, polymerizable.
- Examples thereof include an epoxy compound having a double bond and an isocyanate-based compound having a polymerizable double bond.
- the double bond equivalent of the polymer A is preferably 500 to 2500 g / mol, more preferably 800 to 2000 g / mol, and further preferably 1000 to 1600 g / mol.
- the cross-linking reaction of the polymer Ano polymerizable double bond sufficiently proceeds by irradiation with ultraviolet rays, and the contact area with the adherend decreases due to the curing shrinkage. Adhesive strength is sufficiently reduced. Since it can be easily peeled off, the pickup performance is further improved.
- the monomer component that could not be polymerized at the time of polymer component synthesis may react with the double bond of the side chain of the polymer component when irradiated with ultraviolet rays, which leads to the suppression of adhesive residue.
- the double bond equivalent of the polymer A is 500 g / mol or more, excessive cross-linking can be suppressed, so that the adhesive layer cannot withstand the deformation of the adhesive tape due to the pin pushing up at the time of pickup, and the adhesive layer becomes a pin shape. It tends to be suppressed from cracking and thereby causing adhesive residue.
- polar groups such as unreacted carboxyl groups tend to remain, and the adhesive force to the adherend before irradiation with ultraviolet rays tends to be further improved.
- the cross-linking reaction proceeds sufficiently and the adhesive strength decreases, and the chips tend to be easily peeled off at the time of pickup.
- the "double bond equivalent" described in the present specification is in accordance with "Test method for acid value, saponification value, ester value, iodine value, hydroxyl value and unsaponifiable matter of chemical products” (JIS K 0070). , The iodine value was measured and the double bond equivalent was obtained. Specifically, an iodine monochloride solution was added to the sample and added to the double bond, and excess I was titrated with a sodium thiosulfate solution and calculated by the following formula.
- A ⁇ (BC) x f x 1.269 ⁇ / S
- the amount of the polymerizable double bond introduced is preferably 40 to 95 mol%, more preferably 43 to 90 mol%, and further, with respect to 100 mol% of the reactive monomer units constituting the polymer A. It is preferably 45 to 80 mol%.
- the "reactive monomer unit” refers to a carboxyl group-containing monomer, an acid anhydride monomer, and a hydroxyl group-containing monomer.
- the amount of the polymerizable double bond introduced is 95 mol% or less, a functional group that can react with the curing agent described later remains in the polymer A, and the anchoring destruction between the base film and the pressure-sensitive adhesive layer is further improved. It tends to be less likely to occur. Furthermore, when the amount of the polymerizable double bond introduced is 95 mol% or less, polar groups such as unreacted carboxyl groups are likely to remain, and the adhesive force to the adherend before ultraviolet irradiation is further improved. There is a tendency.
- Polymer A preferably has a hydroxyl group.
- the hydroxyl group may be derived from a carboxyl group-containing monomer or the like, may be a hydroxyl group derived from a modifier, or the monomer unit such as a carboxyl group-containing monomer reacts with the modifier. It may be a hydroxyl group generated by. Examples of the hydroxyl group generated by the reaction between the carboxyl group-containing monomer and the modifier include an example in which an epoxy compound having a polymerizable double bond is reacted with the carboxyl group-containing monomer.
- the polymer A has a hydroxyl group
- a curing agent described later when blended, a plurality of polymers can be further crosslinked via the hydroxyl group, and the cohesive force of the pressure-sensitive adhesive layer tends to be further improved.
- the anchoring property between the base film and the pressure-sensitive adhesive layer is further improved, aggregation fracture and anchorage fracture are suppressed, and more stable adhesive properties tend to be obtained.
- the content of the monomer unit having a hydroxyl group among the monomer units contained in the polymer A is preferably 5 to 40 mol%, more preferably 10 to 30 mol%, based on 100 mol% of all the monomer units. More preferably, it is 10 to 25 mol%.
- the content of the monomer unit having a hydroxyl group is within the above range, the cohesive force of the pressure-sensitive adhesive layer tends to be further improved.
- the weight average molecular weight of the polymer A is preferably 1.0 ⁇ 10 5 to 2.0 ⁇ 10 6 , more preferably 2.0 ⁇ 10 5 to 1.0 ⁇ 10 6 , and even more preferably 2. It is .5 ⁇ 10 5 to 8.0 ⁇ 10 5 .
- the weight average molecular weight of the polymer A is 1.0 ⁇ 105 or more, the number of high molecular weight components increases, and the higher the molecular weight, the more the opportunity for one polymer A to polymerize with another polymer A by a polymerizable double bond. There is a tendency for pollution to be further reduced due to the increase in the amount of water.
- the weight average molecular weight of the polymer A is 2.0 ⁇ 106 or less, the polymer A is easy to move, and one polymer A has more chances to polymerize with the other polymer A, so that the contamination tends to be further reduced. be. Further, as the molecular weight is smaller, the elastic modulus of the pressure-sensitive adhesive does not become too high, so that the pressure-sensitive adhesive strength in a normal state tends to be further improved. In addition, since the followability to the adherend is improved and the step of the adherend can be followed, contamination due to poor UV curing due to oxygen inhibition can be avoided. Further, since the soft adhesive is sufficiently cured and shrunk by UV irradiation, the adhesive strength after curing can be sufficiently reduced.
- the "weight average molecular weight” described in the present specification is a molecular weight measured by using a gel permeation chromatograph analyzer for a sample in which polymer A is dissolved in tetrahydrofuran.
- the ratio of the area of the chromatogram to the retention time when the weight average molecular weight becomes 20000 or less is calculated from the calibration curve of the molecular weight in terms of standard polystyrene, assuming that the area of the chromatogram of the polymer A is 100 area%. Can be found at.
- the glass transition point of the polymer A is preferably ⁇ 80 to 23 ° C., more preferably ⁇ 70 to 10 ° C., and even more preferably ⁇ 60 to 0 ° C.
- the glass transition point of the polymer A is ⁇ 80 ° C. or higher, the contamination tends to be further reduced.
- the glass transition point of the polymer A is 23 ° C. or lower, the adhesiveness to the adherend tends to be further improved.
- the content of the polymer A is preferably 80 to 99.5% by mass, more preferably 85 to 99.5% by mass, and further preferably 90 to 99.5% by mass with respect to the total amount of the pressure-sensitive adhesive layer. %.
- contamination tends to be further suppressed.
- the photoradical initiator is not particularly limited, and is, for example, an alkylphenone-based photopolymerization initiator, an acylphosphine oxide-based photopolymerization initiator, a thioxanthone-based photopolymerization initiator, aromatic ketones, an aromatic onium salt compound, and an organic substance.
- a peroxide such as a thiophenyl group-containing compound
- an ⁇ -aminoalkylphenone compound such as a thiophenyl group-containing compound
- a hexaarylbiimidazole compound such as a ketooxime ester compound
- a borate compound such as a thiophenyl compound
- an azinium compound such as a metallocene compound, an active ester compound, and a carbon halogen bond.
- Examples include compounds and alkylamine compounds.
- an alkylphenone-based photopolymerization initiator is preferable.
- the content of the photoradical initiator is preferably 0.1 to 5.0% by mass, more preferably 0.2 to 4.0% by mass, still more preferably, with respect to the total amount of the pressure-sensitive adhesive layer. It is 0.3 to 3.0% by mass. When the content of the photoradical initiator is within the above range, contamination tends to be further suppressed.
- the curing agent is not particularly limited, and examples thereof include isocyanate-based compounds, epoxy-based compounds, and amine-based compounds. Of these, isocyanate compounds are preferred. By using such a curing agent, the cohesive force of the pressure-sensitive adhesive layer tends to be further improved. These curing agents may be used alone or in combination of two or more.
- the isocyanate-based compound is not particularly limited, and is, for example, an aromatic diisocyanate such as tolylene diisocyanate, 4,4-diphenylmethane diisocyanate, and xylylene diisocyanate; an alicyclic diisocyanate such as isophorone diisocyanate and methylene bis (4-cyclohexyl isocyanate); Examples thereof include aliphatic diisocyanates such as hexamethylene diisocyanate and trimethylhexamethylene diisocyanate. These may be used alone or in combination of two or more.
- the curing agent is preferably a polyfunctional isocyanate compound having two or more functions.
- the plurality of polymers A can be crosslinked with the curing agent, so that the cohesive force of the pressure-sensitive adhesive layer tends to be further improved. Further, the anchoring property between the base material layer and the pressure-sensitive adhesive layer is also improved, and more stable pressure-sensitive adhesive properties tend to be obtained.
- the content of the curing agent is preferably 0.10 to 5.0 parts by weight, more preferably 0.15 to 3.0 parts by weight, still more preferably 0.20 with respect to 100 parts by weight of the polymer A. ⁇ 2.0 parts by weight.
- the content of the curing agent is 0.1 part by weight or more, the crosslink density of the pressure-sensitive adhesive layer is further improved, the cohesive fracture generated at the time of peeling is further suppressed, and the contamination caused by the cohesive fracture is further suppressed. There is a tendency.
- the content of the curing agent is 5.0 parts by weight or less, the crosslink density is further lowered and the elastic modulus is lowered, so that the adhesive strength tends to be further improved.
- the content of the curing agent is preferably 0.10 to 2.0% by mass, more preferably 0.15 to 1.5% by mass, and further preferably 0.10 to 1.5% by mass with respect to the total amount of the pressure-sensitive adhesive layer. It is 0.20 to 1.0% by mass. When the content of the curing agent is within the above range, contamination tends to be further suppressed.
- a tackifier, a cross-linking retarder, an antioxidant, or the like can be added to the pressure-sensitive adhesive layer of the present embodiment, if necessary.
- the tackifier is not particularly limited, but is not particularly limited, for example, petroleum resin, terpene resin, terpenephenol resin, aromatic modified terpene resin, kumaron-inden resin, natural resin rosin, modified rosin, glycerin ester rosin, pentaerythritol ester rosin. , Phenolic resin, xylene resin, alicyclic petroleum resin, styrene resin, dicyclopentadiene resin and the like.
- the cross-linking retarder is not particularly limited, but for example, in a pressure-sensitive adhesive composition containing an isocyanate-based curing agent, by blocking the isocyanate group contained in the curing agent, excessive increase in viscosity of the pressure-sensitive adhesive composition is suppressed. It is a compound that can be used.
- a cross-linking retarder is not particularly limited, but is, for example, ⁇ -diketones such as acetylacetone, hexane-2,4-dione, heptane-2,4-dione, octane-2,4-dione; acetoacetic acid.
- ⁇ -ketoesters such as methyl, ethyl acetoacetate, propyl acetoacetate, butyl acetoacetate, octyl acetoacetic acid, oleyl acetoacetic acid, lauryl acetoacetic acid, stearyl acetoacetic acid; benzoylacetone and the like can be mentioned.
- the antioxidant is not particularly limited, but is, for example, methylhydroquinone, hydroquinone, 2,2-methylene-bis (4-methyl-6-terrary butylphenol), catechol, hydroquinone monomethyl ether, monotersial butylhydroquinone, 2 , 5-Ditershally butyl hydroquinone, p-benzoquinone, 2,5-diphenyl-p-benzoquinone, 2,5-diterly butyl-p-benzoquinone, picric acid, citric acid, phenothiazine, tertiary butyl catechol, 2-butyl -4-Hydroxyanisole, 2,6-ditersial butyl-p-cresol and 4-[[4,6-bis (octylthio) -1,3,5-triazine-2-yl] amino] -2,6- Examples include the tertiary butylphenol.
- the thickness of the pressure-sensitive adhesive layer is usually 1.0 to 250 ⁇ m, preferably 2.0 to 50 ⁇ m. More preferably, it is 5.0 to 40 ⁇ m.
- the thickness of the pressure-sensitive adhesive layer is usually 1.0 to 250 ⁇ m, preferably 2.0 to 50 ⁇ m. More preferably, it is 5.0 to 40 ⁇ m.
- the thickness of the base material layer and the adhesive layer in the above range so that the total thickness of the tape is preferably in the range of 60 to 250 ⁇ m. ..
- the total thickness of the semiconductor wafer processing tape is more preferably 70 to 200 ⁇ m, still more preferably 70 to 180 ⁇ m.
- the material constituting the base material layer is not particularly limited, and is, for example, polyvinyl chloride, polyethylene terephthalate, ethylene-vinyl acetate copolymer, ethylene-acrylic acid-acrylic acid ester film, ethylene-ethyl acrylate copolymer, and the like.
- the base film constituting the base layer may be a single material of these resins, a mixture of two or more kinds, a copolymer, or a laminate thereof.
- the thickness of the base material layer can be appropriately selected as long as the workability is not impaired.
- the thickness of the base material layer is usually 10 to 500 ⁇ m, preferably 50 to 200 ⁇ m, and more preferably 70 to 150 ⁇ m. By adjusting the thickness of the base material layer within the above range, there is no practical problem and it is economically effective.
- the base material layer is composed of a plurality of base material films, it is preferable to adjust the thickness of the entire base material layer so as to be within the above range.
- the base material layer may be chemically or physically surface-treated, if necessary, in order to improve the adhesion to the pressure-sensitive adhesive layer.
- Examples of the surface treatment include corona treatment, chromic acid treatment, ozone exposure, flame exposure, high-voltage impact exposure, ionizing radiation treatment and the like.
- the adhesive tape of the present embodiment may have a protective film attached to the adhesive layer in order to protect the adhesive layer. Since the protective film is peeled off when the adhesive tape is used, it is preferable that the protective film has excellent peelability.
- the protective film is not particularly limited, and examples thereof include a film made of a fluororesin having a low surface energy, a film in which the surface of polyethylene terephthalate is treated with a silicone-based release agent, and the like.
- the adhesive tape of this embodiment can be suitably used for processing semiconductor wafers, semiconductor devices, or various semiconductor packages.
- the semiconductor wafer may be an individual piece on which an electronic circuit or the like is formed or a previous one.
- a semiconductor device refers to various semiconductor chips after being fragmented or an element containing the same, and a semiconductor package is a connection terminal for connecting a resin for protecting the semiconductor chip, the semiconductor chip, and the outside. Refers to those with.
- the method for producing the adhesive tape is not particularly limited, and examples thereof include a method of forming an adhesive layer on the base material layer.
- the base material layer of the adhesive tape of this embodiment can be manufactured according to a well-known technique.
- the means for forming the base material layer is not particularly limited, but the above-mentioned various materials are subjected to conventional melt-kneading or the like or various mixing devices (single-screw or twin-screw extruder, roll, Banbury mixer, various kneaders, etc.). Then, each component is mixed so as to be uniformly dispersed, and the mixture is formed into a base material by a T-die method, a calendar method, or an inflation method. A method of forming a film by using a T-die method using an extruder having good thickness accuracy is preferable.
- the adhesive layer of the adhesive tape of the present embodiment can be manufactured according to a well-known technique.
- the means for forming the pressure-sensitive adhesive layer is not particularly limited, but the above-mentioned various materials are dissolved in a solvent such as an organic solvent to form a varnish, which is then applied onto a protective film by a knife coating method, a roll coating method, or a spray.
- the pressure-sensitive adhesive layer is formed by applying by a coating method, a gravure coating method, a bar coating method, a curtain coating method, or the like, and removing the solvent.
- An adhesive tape is produced by laminating this on a base material layer.
- the aging treatment may be performed after the pressure-sensitive adhesive layer is formed.
- the formed pressure-sensitive adhesive layer is stored under a predetermined temperature.
- the temperature condition is not particularly limited, but is preferably 30 to 50 ° C, more preferably 35 to 45 ° C.
- the storage time is not particularly limited, but is preferably 24 to 150 hours, more preferably 48 to 100 hours.
- the processing method of the present embodiment includes a bonding step of bonding the adhesive tape and the adherend, and a dicing step of processing the adherend with the adhesive tape and the adherend bonded together. This is a method for processing a semiconductor wafer, a semiconductor device, or various semiconductor packages as an adherend. Further, the processing method of the present embodiment includes, if necessary, an ultraviolet irradiation step of irradiating the adhesive tape after the dicing step with ultraviolet rays, and a pick-up process of picking up individualized chips from the adhesive tape after the ultraviolet irradiation. You may have it.
- the individualizing method by the dicing step is not particularly limited, and a conventionally known method can be used.
- a silicon wafer can be cut into a semiconductor chip by rotating a dicing blade containing diamond abrasive grains at high speed using a dicing device.
- the ultraviolet irradiation method is not particularly limited, but a conventionally known method can be used.
- an ultraviolet irradiation device is used to irradiate the adhesive tape in the dicing process with ultraviolet rays.
- the pick-up method is not particularly limited, but a conventionally known method can be used.
- the adhesive tape after irradiation with ultraviolet rays can be stretched in the plane direction, and the chips can be picked up by the pick-up device in a state where the chips are separated.
- Example 1 92 parts by weight of 2-ethylhexyl acrylate, 8 parts by weight of acrylic acid, and 0.05 parts by weight of the initiator (azobisisobutyronitrile) were copolymerized in ethyl acetate at 65 ° C. for 24 hours. , A solution containing an acrylic polymer was obtained.
- the initiator azobisisobutyronitrile
- Acrylic acid unit carboxyl group in the acrylic polymer was reacted with glycidyl methacrylate to obtain a side chain double bond introduction type acrylic polymer in which a double bond was introduced into the side chain. At this time, both were reacted so that the amount of glycidyl methacrylate introduced was 80 mol (80 mol%) per 100 mol of the methacrylic acid unit of the acrylic polymer.
- This resin composition is applied onto the release-treated surface of the polyethylene terephthalate protective film that has been previously subjected to the release treatment so that the thickness of the pressure-sensitive adhesive layer after drying is 20 ⁇ m, and dried at 100 ° C. for 1 minute. After that, the surface to which the pressure-sensitive adhesive layer is bonded in advance is bonded to the corona-treated surface of the ionomer film (base resin film) of the ethylene-methacrylic acid-acrylic acid ester-based copolymer that has been subjected to corona treatment. The adhesive was transferred to the material resin film. This was aged in an atmosphere of 40 ° C. for 72 hours to obtain an adhesive tape.
- Example 2 An adhesive tape was produced in the same manner as in Example 1 except that the amount of glycidyl methacrylate introduced was 60 mol (60 mol%) per 100 mol of acrylic acid unit of the acrylic polymer.
- Example 3 An adhesive tape was produced in the same manner as in Example 1 except that the amount of the curing agent used was 0.3 parts by weight.
- Example 4 97 parts by weight of 2-ethylhexyl acrylate, 3 parts by weight of acrylic acid, and 0.05 part by weight of the initiator (azobisisobutyronitrile) were copolymerized in ethyl acetate at 65 ° C. for 24 hours.
- An adhesive tape was prepared in the same manner as in Example 1 except that a solution containing an acrylic polymer was obtained.
- Example 5 Except that the amount of glycidyl methacrylate introduced was 70 mol (70 mol%) per 100 mol of acrylic acid unit of the acrylic polymer, and the amount of the curing agent used was 0.2 parts by weight.
- An adhesive tape was produced in the same manner as in Example 1.
- the adhesive tape was irradiated with ultraviolet rays at 150 mJ / cm 2 with a high-pressure mercury lamp. Then, the pressure-sensitive adhesive layer was cut into a width of 1 cm, a length of 10 cm, and a thickness of 60 to 110 ⁇ m, and used as a sample.
- the tensile elastic modulus and the elongation at break of the pressure-sensitive adhesive layer after irradiation with ultraviolet rays were measured with a universal tensile tester (Tensilon model number: RTG-1210 manufactured by ORIENTEC) in an environment of temperature 23 ° C. and humidity 50%. Measurement mode: Tension Tension speed: 5 mm / min Distance between chucks: 50 mm
- volume shrinkage rate ⁇ (ds-dl) / dl ⁇ ⁇ 100 Relative density before curing: dl, specific density after curing: ds
- the glass transition point of the polymer A was measured by the differential scanning calorimetry method (DSC method) based on JIS K7121.
- the adhesive strength of the adhesive tape was measured according to the method for measuring the adhesive strength of JIS Z0237 (2009) (Method 1: A test method in which the tape and the sheet are peeled off at 180 ° with respect to the stainless steel test plate). Specifically, the adhesive tape is crimped onto a silicon wafer whose surface has been cleaned using a crimping device (roller mass 2 kg), and the adhesive tape is peeled off at 180 ° to the silicon wafer. S0 was measured with a universal tensile tester ( Tencilon model number: RTG-1210 manufactured by ORIENTEC) in an environment of temperature 23 ° C. and humidity 50%.
- the adhesive tape was crimped onto the silicon wafer whose surface was washed using a crimping device (roller mass 2 kg), and the adhesive tape was irradiated with ultraviolet rays at 150 mJ / cm 2 by a high-pressure mercury lamp. Then, the 180 ° peel strength S1 when the adhesive tape was peeled off from the silicon wafer at 180 ° was measured in the same manner as described above. The measurement conditions are shown below. (Measurement condition) Measurement mode: Tension Tension speed: 300 mm / min Distance between chucks: 50 mm Measurement sample width: 20 mm
- the double bond equivalent is measured by measuring the iodine value in accordance with "Test method for acid value, saponification value, ester value, iodine value, hydroxyl value and unsaponifiable matter of chemical products" (JIS K 0070).
- the double bond equivalent was determined. Specifically, an iodine monochloride solution was added to the sample and added to the double bond, and excess I was titrated with a sodium thiosulfate solution and calculated by the following formula.
- A ⁇ (BC) x f x 1.269 ⁇ / S
- the adhesive tape of the present invention has industrial applicability as a tape for processing semiconductor wafers, particularly as an adhesive tape used in a dicing process.
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Abstract
Description
〔1〕
基材層と、該基材層上に設けられた粘着剤層と、を有し、
前記粘着剤層が、光ラジカル開始剤と、重合性炭素二重結合を有するポリマーAと、を含み、
紫外線照射後の前記粘着剤層の引張弾性率が、400MPa以下であり、
紫外線照射後の前記粘着剤層の破断伸び率が、16%以上である、粘着テープ。
〔2〕
前記粘着剤層の紫外線硬化前後における体積収縮率が、0.50~10.0%である、
〔1〕に記載の粘着テープ。
〔3〕
紫外線硬化前の前記粘着剤層のシリコンウエハに対する180°剥離強度が、23℃において、2.0~20.0N/20mmであり、
且つ紫外線硬化後の前記粘着剤層のシリコンウエハに対する180°剥離強度が、23℃において、0.05~1.0N/20mmである、
〔1〕又は〔2〕に記載の粘着テープ。
〔4〕
前記ポリマーAの二重結合当量が、500~2500g/molである、
〔1〕~〔3〕のいずれか1項に記載の粘着テープ。
〔5〕
前記ポリマーAが、水酸基を有する、
〔1〕~〔4〕のいずれか1項に記載の粘着テープ。
〔6〕
前記ポリマーAの重量平均分子量が、1.0×105~2.0×106である、
〔1〕~〔5〕のいずれか1項に記載の粘着テープ。
〔7〕
前記ポリマーAのガラス転移点が、-80~23℃である、
〔1〕~〔6〕のいずれか1項に記載の粘着テープ。
〔8〕
前記粘着剤層のポリマーAが、(メタ)アクリル酸エステル系共重合体を含み、
該(メタ)アクリル酸エステル系共重合体が、直鎖形状、分岐形状、又は架橋形状を有する、
〔1〕~〔7〕のいずれか1項に記載の粘着テープ。
〔9〕
前記粘着剤層が、硬化剤をさらに含む、
〔1〕~〔8〕のいずれか一項に記載の粘着テープ。
〔10〕
前記硬化剤が、イソシアネート系化合物である、
〔9〕に記載の粘着テープ。
〔11〕
前記イソシアネート系化合物が、2官能以上の多官能イソシアネート系化合物を含む、
〔10〕に記載の粘着テープ。
〔12〕
半導体ウエハ、半導体デバイス、各種半導体パッケージ加工用である、
〔1〕~〔11〕のいずれか1項に記載の粘着テープ。
〔13〕
〔1〕~〔12〕のいずれか一項に記載の粘着テープと、被着体と、を貼り合わせる貼合工程と、
前記粘着テープと前記被着体とを貼り合わせた状態で、前記被着体を加工するダイシング工程と、を有し、
前記被着体が、半導体ウエハ、半導体デバイス、又は各種半導体パッケージである、
加工方法。
本実施形態の粘着テープは、基材層と、該基材層上に設けられた粘着剤層と、を有し、粘着剤層が、光ラジカル開始剤と、重合性炭素二重結合を有するポリマーAと、を含み、紫外線照射後の粘着剤層の引張弾性率が400MPa以下であり、紫外線照射後の粘着剤層の破断伸び率が16%以上である。
紫外線照射後の粘着剤層の引張弾性率は、400MPa以下であり、好ましくは350MPaであり、より好ましくは300MPa以下であり、さらに好ましくは150MPa以下であり、よりさらに好ましくは100MPa以下であり、さらにより好ましくは50MPa以下である。また、引張弾性率の下限値は特に制限されないが、1.0MPa以上が好ましく、3.0MPa以上であってもよい。
紫外線照射後の粘着剤層の破断伸び率は、16%以上であり、好ましくは22%以上であり、より好ましくは25%以上であり、さらに好ましくは35%以上であり、さらにより好ましくは45%以上であり、よりさらに好ましくは55%以上である。また、引張弾性率の上限値は特に制限されないが、200%以下が好ましく、90%以下であってもよい。
紫外線照射後の粘着剤層の体積収縮率は、紫外線照射前の体積を100%として、好ましくは0.50~10.0%であり、より好ましくは0.70~8.0%であり、さらに好ましくは0.90~5.0%である。
体積収縮率r={(ds-dl)/dl}x100
硬化前の比重:dl、硬化後の比重:ds
紫外線照射前の粘着剤層のシリコンウエハに対する180°剥離強度S0は、23℃において、好ましくは2.0~20.0N/20mmであり、より好ましくは4.0~16.0N/20mmであり、さらに好ましくは6.0~14.0N/20mmである。
粘着剤層は、光ラジカル開始剤と、重合性炭素二重結合を有するAと、を含み、必要に応じて、硬化剤を含んでいてもよい。
ポリマーAは、重合性炭素二重結合を有する重合体であり、粘着剤層の主成分を構成する成分である。粘着剤層に紫外線を照射すると光ラジカル開始剤がラジカルを発生し、それによりポリマーAの重合性炭素二重結合がそれぞれ重合する。これにより、紫外線照射後においては、ポリマーAは互いに架橋した状態となる。
A={(B-C)×f×1.269}/S
A:よう素価
B:空試験に用いたチオ硫酸ナトリウム溶液の量(mL)
C:滴定に用いたチオ硫酸ナトリウム溶液の量(mL)
f:チオ硫酸ナトリウム溶液のファクター
S:試料の質量(g)
1.269:よう素の原子量
光ラジカル開始剤としては、特に限定されないが、例えば、アルキルフェノン系光重合開始剤、アシルホスフィンオキサイド系光重合開始剤、チオキサントン系光重合開始剤、芳香族ケトン類、芳香族オニウム塩化合物、有機過酸化物、チオ化合物(チオフェニル基含有化合物など)、α-アミノアルキルフェノン化合物、ヘキサアリールビイミダゾール化合物、ケトオキシムエステル化合物、ボレート化合物、アジニウム化合物、メタロセン化合物、活性エステル化合物、炭素ハロゲン結合を有する化合物、及びアルキルアミン化合物が挙げられる。
硬化剤としては、特に制限されないが、例えば、イソシアネート系化合物、エポキシ系化合物、アミン系化合物などを挙げることができる。このなかでも、イソシアネート系化合物が好ましい。このような硬化剤を用いることにより、粘着剤層の凝集力がより向上する傾向にある。これら硬化剤は1種単独で用いても、2種以上を併用してもよい。
本実施形態の粘着剤層は、必要に応じて、粘着付与剤、架橋遅延剤、酸化防止剤等を添加することができる。
粘着剤層の厚さは、通常は1.0~250μmであり、好ましくは2.0~50μmである。さらに好ましくは5.0~40μmである。粘着剤層の厚さを1.0μm以上にすることによって、十分な粘着力を確保することができるため、エキスパンドによって分割された半導体のチップの飛散を抑制することが容易となる。また、粘着剤層の厚さが250μm以下であることにより、よりコストが抑えられる傾向にある。
基材層を構成する材料としては、特に制限されないが、例えば、ポリ塩化ビニル、ポリエチレンテレフタレート、エチレン-酢酸ビニル共重合体、エチレン-アクリル酸-アクリル酸エステルフィルム、エチレン-エチルアクリレート共重合体、ポリエチレン、ポリプロピレン、プロピレン系共重合体、エチレン-アクリル酸共重合体、及び、エチレン-(メタ)アクリル酸共重合体やエチレン-(メタ)アクリル酸-(メタ)アクリル酸エステル系共重合体等を金属イオンで架橋したアイオノマー樹脂が挙げられる。基材層を構成する基材フィルムは、これら樹脂の単独、2種以上の混合物、共重合体、又はこれらの積層物であっても良い。
本実施形態の粘着テープは、粘着剤層を保護するため、粘着剤層に貼り合わせられた保護フィルムを有していてもよい。保護フィルムは、粘着テープの使用時に剥離されるため、剥離性に優れるものが好ましい。保護フィルムとしては、特に制限されないが、例えば、フッ素樹脂からなる表面エネルギーの低いフィルム、ポリエチレンテレフタレートの表面をシリコーン系剥離剤で処理したフィルム等が挙げられる。
本実施形態の粘着テープは、半導体ウエハ、半導体デバイス、又は各種半導体パッケージの加工用途に好適に用いることができる。半導体ウエハは、電子回路等が形成された個片か前のものであってもよい。また、半導体デバイスは、個片化された後の各種半導体チップあるいはそれを含む素子をいい、半導体パッケージとは、半導体チップにそれを保護するための樹脂と半導体チップと外部とを接続する接続端子を付したものをいう。
粘着テープの製造方法としては、特に制限されないが、基材層上に粘着剤層を形成する方法が挙げられる。
本実施形態の加工方法は、上記粘着テープと、被着体と、を貼り合わせる貼合工程と、粘着テープと被着体とを貼り合わせた状態で、被着体を加工するダイシング工程と、を有し、被着体として半導体ウエハ、半導体デバイス、又は各種半導体パッケージを加工する方法である。また、本実施形態の加工方法は、必要に応じて、ダイシング工程後の粘着テープに紫外線を照射する紫外線照射工程や、紫外線照射後の粘着テープから、個片化したチップをピックアップするピックアップ工程を有していてもよい。
アクリル酸2-エチルヘキシル92重量部と、アクリル酸8重量部と、開始剤(アゾビスイソブチロニトリル)0.05重量部とを酢酸エチル中で、65℃で、24時間、共重合させて、アクリル系ポリマーを含む溶液を得た。
メタクリル酸グリシジルの導入量をアクリル系ポリマーのアクリル酸単位100モル当たり、60モル(60モル%)となるようにしたこと以外は、実施例1と同様にして、粘着テープを作製した。
硬化剤の使用量を0.3重量部となるようにしたこと以外は、実施例1と同様にして、粘着テープを作製した。
アクリル酸2-エチルヘキシル97重量部と、アクリル酸3重量部と、開始剤(アゾビスイソブチロニトリル)0.05重量部とを酢酸エチル中で、65℃で、24時間、共重合させて、アクリル系ポリマーを含む溶液を得たこと以外は、実施例1と同様にして、粘着テープを作製した。
メタクリル酸グリシジルの導入量をアクリル系ポリマーのアクリル酸単位100モル当たり、70モル(70モル%)となるようにし、硬化剤の使用量を0.2重量部となるようにしたこと以外は、実施例1と同様にして、粘着テープを作製した。
開始剤の量を調整して、アクリル系ポリマーの重量平均分子量を調整したこと以外は、実施例1と同様にして、粘着テープを作製した。
実施例1で調製したアクリル系ポリマーに対して、メタクリル酸グリシジルを反応させずに、代わりに紫外線重合性ウレタンアクリレートを別添加し、併せて硬化剤と開始剤の量を調整したこと以外は実施例1と同様にして、粘着テープを作製した。
粘着テープに対して、高圧水銀灯により紫外線を150mJ/cm2照射した。そして、粘着剤層を、幅1cm、長さ10cm、厚み60~110μmに切り出して、サンプルとして用いた。紫外線照射後の粘着剤層の引張弾性率及び破断伸び率は、温度23℃湿度50%の環境下において、万能型引張試験機(ORIENTEC社製 テンシロン 型番:RTG-1210)で測定した。
測定モード:引張り
引張り速度:5mm/min
チャック間距離:50mm
体積収縮率は、JIS Z 8807の固体の密度及び比重の測定法に沿って、液中ひょう量法(天びん法)により硬化前後の比重を測定し、比重変化より硬化収縮率を求めたものである。以下の式で求めた。
体積収縮率r={(ds-dl)/dl}×100
硬化前の比重:dl、硬化後の比重:ds
上記のようにして合成した側鎖二重結合導入型アクリル系ポリマー10mgをテトラヒドロフラン(THF、安定化剤不含、和光製薬工業株式会社製)10mLに溶解し、メンブランフィルター(PTFE製、0.50μm)でろ過したものを分析に供した。重量平均分子量の測定条件を以下に示す。
ゲル浸透クロマトグラフ分析装置(DGU-20AC等、株式会社島津製作所製)
(測定条件)
標準物質:Shodex STANDARD (Type:SM-105、昭和電工株式会社製)
試料導入量:20μL
移動相:THF
流量 :1mL/min
カラム:Shim-pack GPC-80M (300mm×8.0mmI.D.)
カラム温度:40℃
検出器:示差屈折率検出器(RID)
ポリマーAのガラス転移点の測定は、JIS K7121に基づいて、示差走査熱量測定法(DSC法)により測定した。
粘着テープの粘着力は、JIS Z0237(2009)の粘着力の測定方法(方法1:テープ及びシートをステンレス試験板に対して180°に引きはがす試験方法)に準拠して測定した。具体的には、表面を洗浄したシリコンウエハに粘着テープを圧着装置(ローラの質量2kg)を用いて圧着させて、シリコンウエハに対して180°で粘着テープを引き剥がした際の180°剥離強度S0を、温度23℃湿度50%の環境下において、万能型引張試験機(ORIENTEC社製 テンシロン 型番:RTG-1210)で測定した。
(測定条件)
測定モード:引張り
引張り速度:300mm/min
チャック間距離:50mm
測定サンプル幅:20mm
二重結合当量は、「化学製品の酸価,けん化価,エステル価,よう素価,水酸基価及び不けん化物の試験方法」(JIS K 0070)」に沿って、よう素価を測定し二重結合当量を求めた。具体的には、試料に一塩化よう素溶液を添加し二重結合に付加させ、過剰のIをチオ硫酸ナトリウム溶液で滴定し、以下の式で求めた。
A={(B-C)×f×1.269}/S
A:よう素価
B:空試験に用いたチオ硫酸ナトリウム溶液の量(mL)
C:滴定に用いたチオ硫酸ナトリウム溶液の量(mL)
f:チオ硫酸ナトリウム溶液のファクター
S:試料の質量(g)
1.269:よう素の原子量
幅100mm×奥行50mm×厚さ0.76mmのエポキシ封止樹脂の裏面に、ローラーを備えたテープマウンター装置を用い、上記のようにして作製した粘着テープを貼り合わせた。次いで、ダイシングブレードでエポキシ封止樹脂を3.2mm×3.2mmの半導体チップにダイシングした。ダイシングの主な設定条件は、以下の通りである。
(設定条件)
ダイシング装置:DISCO社製DAD341
ダイシングブレード:DISCO社製P1A861 SDC240N75BR597
ダイシングブレード回転数:25,000rpm
ダイシングブレード送り速度:35mm/秒
切削水温度:25℃。
切削水量:1.0リットル/分
ダイシング工程後に、紫外線を150mJ/cm2照射して粘着剤層を硬化させた。その後、粘着テープから半導体チップをピックアップして剥離した。ピックアップの主な設定は、以下の通りである。なお、ニードルピン突き上げ高さ(ピンハイト)は、最初に0.1mmに設定し、10個の半導体チップのピックアップを試し、全ての半導体チップをピックアップできない場合には、ニードルピン突き上げ高さを0.1m増加させて、10個の半導体チップのピックアップを試すという操作を繰り返した。
(設定条件)
ピックアップ装置:キヤノンマシナリー社製CAP-300II
ニードルピン形状:250μmR
ニードルピン突き上げ高さ:0.1~1.0mm
エキスパンド量:8mm
突き上げ速度:10,000μm/秒
<糊残り性>
ダイシング、ピックアップ工程後、顕微鏡により被着体への糊残りの有無を観察した。
◎(優):チップ上に糊の付着がなく、汚染もない
〇(良):チップ上に糊の付着はないが、薄い汚染がある
△(可):チップ上に糊の付着はないが、濃い汚染がある
×(不可):チップ上に糊の付着と汚染が見られる
ここで、「薄い汚染」とは、シリコンウエハのテープが貼ってあった場所の色がうっすら変わった程度のものを指し、「濃い汚染」とは、明らかにテープ跡がわかるものを指す。
ピックアップ時ピンハイトについて、0.1mmから1.0mmまで0.1mm刻みでピックアップ試験を行なった。より具体的には、各ピンハイトにて100個のチップのピックアップを試み、ピックアップできたチップの割合(ピックアップ収率)を、ピンハイトごとに確認した。そして、チップのピックアップ収率が95%以上となったピンハイトの最小値を表に記載した。また、ピンハイト1.0mmにおいてもチップのピックアップ収率が95%以上とならない場合には、表に「-」と記載した。
Claims (13)
- 基材層と、該基材層上に設けられた粘着剤層と、を有し、
前記粘着剤層が、光ラジカル開始剤と、重合性炭素二重結合を有するポリマーAと、を含み、
紫外線照射後の前記粘着剤層の引張弾性率が、400MPa以下であり、
紫外線照射後の前記粘着剤層の破断伸び率が、16%以上である、粘着テープ。 - 前記粘着剤層の紫外線硬化前後における体積収縮率が、0.50~10.0%である、
請求項1に記載の粘着テープ。 - 紫外線硬化前の前記粘着剤層のシリコンウエハに対する180°剥離強度が、23℃において、2.0~20.0N/20mmであり、
且つ紫外線硬化後の前記粘着剤層のシリコンウエハに対する180°剥離強度が、23℃において、0.05~1.0N/20mmである、
請求項1又は2に記載の粘着テープ。 - 前記ポリマーAの二重結合当量が、500~2500g/molである、
請求項1~3のいずれか1項に記載の粘着テープ。 - 前記ポリマーAが、水酸基を有する、
請求項1~4のいずれか1項に記載の粘着テープ。 - 前記ポリマーAの重量平均分子量が、1.0×105~2.0×106である、
請求項1~5のいずれか1項に記載の粘着テープ。 - 前記ポリマーAのガラス転移点が、-80~23℃である、
請求項1~6のいずれか1項に記載の粘着テープ。 - 前記粘着剤層のポリマーAが、(メタ)アクリル酸エステル系共重合体を含み、
該(メタ)アクリル酸エステル系共重合体が、直鎖形状、分岐形状、又は架橋形状を有する、
請求項1~7のいずれか1項に記載の粘着テープ。 - 前記粘着剤層が、硬化剤をさらに含む、
請求項1~8のいずれか一項に記載の粘着テープ。 - 前記硬化剤が、イソシアネート系化合物である、
請求項9に記載の粘着テープ。 - 前記イソシアネート系化合物が、2官能以上の多官能イソシアネート系化合物を含む、
請求項10に記載の粘着テープ。 - 半導体ウエハ、半導体デバイス、各種半導体パッケージ加工用である、
請求項1~11のいずれか1項に記載の粘着テープ。 - 請求項1~12のいずれか一項に記載の粘着テープと、被着体と、を貼り合わせる貼合工程と、
前記粘着テープと前記被着体とを貼り合わせた状態で、前記被着体を加工するダイシング工程と、を有し、
前記被着体が、半導体ウエハ、半導体デバイス、又は各種半導体パッケージである、
加工方法。
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EP21889025.9A EP4242280A4 (en) | 2020-11-09 | 2021-10-20 | ADHESIVE TAPE AND MACHINING METHOD |
US18/035,910 US20230407149A1 (en) | 2020-11-09 | 2021-10-20 | Adhesive tape and processing method |
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KR101920091B1 (ko) * | 2010-08-23 | 2018-11-19 | 세키스이가가쿠 고교가부시키가이샤 | 접착 시트 및 반도체 칩의 실장 방법 |
JP5573507B2 (ja) * | 2010-09-02 | 2014-08-20 | 三菱レイヨン株式会社 | 積層シートロールの製造方法 |
JP5529786B2 (ja) * | 2011-03-03 | 2014-06-25 | 株式会社ダイセル | 柔軟性光学シート |
JP6490459B2 (ja) * | 2015-03-13 | 2019-03-27 | 古河電気工業株式会社 | ウェハ固定テープ、半導体ウェハの処理方法および半導体チップ |
JP6034522B1 (ja) * | 2016-03-17 | 2016-11-30 | 古河電気工業株式会社 | 半導体ウェハ加工用粘着テープおよび半導体ウェハの加工方法 |
SG11201902922WA (en) * | 2016-10-03 | 2019-05-30 | Lintec Corp | Adhesive tape for semiconductor processing, and semiconductor device manufacturing method |
JP6928852B2 (ja) * | 2016-12-07 | 2021-09-01 | 古河電気工業株式会社 | 半導体加工用テープ |
JP2018115331A (ja) * | 2018-03-20 | 2018-07-26 | リンテック株式会社 | 粘着テープおよび半導体装置の製造方法 |
US11842916B2 (en) * | 2018-06-26 | 2023-12-12 | Lintec Corporation | Semiconductor processing adhesive tape and method of manufacturing semiconductor device |
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WO2009110426A1 (ja) * | 2008-03-03 | 2009-09-11 | リンテック株式会社 | 粘着シート |
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TW202225363A (zh) | 2022-07-01 |
KR20230098594A (ko) | 2023-07-04 |
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