JP6121003B2 - 半導体ウェハ表面保護用粘着フィルム、並びに粘着フィルムを用いる半導体ウェハの保護方法及び半導体装置の製造方法 - Google Patents
半導体ウェハ表面保護用粘着フィルム、並びに粘着フィルムを用いる半導体ウェハの保護方法及び半導体装置の製造方法 Download PDFInfo
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- JP6121003B2 JP6121003B2 JP2015562858A JP2015562858A JP6121003B2 JP 6121003 B2 JP6121003 B2 JP 6121003B2 JP 2015562858 A JP2015562858 A JP 2015562858A JP 2015562858 A JP2015562858 A JP 2015562858A JP 6121003 B2 JP6121003 B2 JP 6121003B2
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- semiconductor wafer
- polymer
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- film
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- FFYWKOUKJFCBAM-UHFFFAOYSA-N ethenyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC=C FFYWKOUKJFCBAM-UHFFFAOYSA-N 0.000 description 1
- BLCTWBJQROOONQ-UHFFFAOYSA-N ethenyl prop-2-enoate Chemical compound C=COC(=O)C=C BLCTWBJQROOONQ-UHFFFAOYSA-N 0.000 description 1
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 description 1
- IIQWTZQWBGDRQG-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate;isocyanic acid Chemical compound N=C=O.CCOC(=O)C(C)=C IIQWTZQWBGDRQG-UHFFFAOYSA-N 0.000 description 1
- VPASWAQPISSKJP-UHFFFAOYSA-N ethyl prop-2-enoate;isocyanic acid Chemical compound N=C=O.CCOC(=O)C=C VPASWAQPISSKJP-UHFFFAOYSA-N 0.000 description 1
- 229920005648 ethylene methacrylic acid copolymer Polymers 0.000 description 1
- 229920006226 ethylene-acrylic acid Polymers 0.000 description 1
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 1
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 229920000554 ionomer Polymers 0.000 description 1
- 229920003049 isoprene rubber Polymers 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 125000005397 methacrylic acid ester group Chemical group 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- DNTMQTKDNSEIFO-UHFFFAOYSA-N n-(hydroxymethyl)-2-methylprop-2-enamide Chemical compound CC(=C)C(=O)NCO DNTMQTKDNSEIFO-UHFFFAOYSA-N 0.000 description 1
- YVOQADGLLJCMOE-UHFFFAOYSA-N n-[6-(aziridine-1-carbonylamino)hexyl]aziridine-1-carboxamide Chemical compound C1CN1C(=O)NCCCCCCNC(=O)N1CC1 YVOQADGLLJCMOE-UHFFFAOYSA-N 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- SRSFOMHQIATOFV-UHFFFAOYSA-N octanoyl octaneperoxoate Chemical compound CCCCCCCC(=O)OOC(=O)CCCCCCC SRSFOMHQIATOFV-UHFFFAOYSA-N 0.000 description 1
- 229940065472 octyl acrylate Drugs 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
- ANISOHQJBAQUQP-UHFFFAOYSA-N octyl prop-2-enoate Chemical compound CCCCCCCCOC(=O)C=C ANISOHQJBAQUQP-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- RPQRDASANLAFCM-UHFFFAOYSA-N oxiran-2-ylmethyl prop-2-enoate Chemical compound C=CC(=O)OCC1CO1 RPQRDASANLAFCM-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005502 peroxidation Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000223 polyglycerol Polymers 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 229920000306 polymethylpentene Polymers 0.000 description 1
- 239000011116 polymethylpentene Substances 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- FBCQUCJYYPMKRO-UHFFFAOYSA-N prop-2-enyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCC=C FBCQUCJYYPMKRO-UHFFFAOYSA-N 0.000 description 1
- QTECDUFMBMSHKR-UHFFFAOYSA-N prop-2-enyl prop-2-enoate Chemical compound C=CCOC(=O)C=C QTECDUFMBMSHKR-UHFFFAOYSA-N 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229920005573 silicon-containing polymer Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000010558 suspension polymerization method Methods 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 150000003505 terpenes Chemical class 0.000 description 1
- 235000007586 terpenes Nutrition 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
Classifications
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- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- 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
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/10—Homopolymers or copolymers of methacrylic 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
- 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
- C09J133/18—Homopolymers or copolymers of nitriles
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
-
- 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
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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]
-
- 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
- H01L21/02002—Preparing wafers
- H01L21/02005—Preparing bulk and homogeneous wafers
- H01L21/02008—Multistep processes
- H01L21/0201—Specific process step
- H01L21/02013—Grinding, lapping
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2405/00—Adhesive articles, e.g. adhesive tapes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/14—Semiconductor wafers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2312/00—Crosslinking
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2407/00—Presence of natural rubber
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09J2421/00—Presence of unspecified rubber
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09J2423/00—Presence of polyolefin
- C09J2423/006—Presence of polyolefin in the substrate
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- C09J2423/00—Presence of polyolefin
- C09J2423/04—Presence of homo or copolymers of ethene
- C09J2423/046—Presence of homo or copolymers of ethene in the substrate
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- C09J2433/00—Presence of (meth)acrylic polymer
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- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09J2483/00—Presence of polysiloxane
Landscapes
- Chemical & Material Sciences (AREA)
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- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Adhesive Tapes (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Description
参照。)。
一方で、ウェハから粘着フィルムを剥離するプロセス条件は様々であり、広い剥離速度範囲において良好な剥離性を示すことも要求されている。
前記基材フィルムの片表面に粘着剤層と、を有し、
前記粘着剤層が、動的粘弾性のtanδが最大となる温度(Ta)が0℃を超える重合体(A)と、動的粘弾性のtanδが最大となる温度(Tb)が0℃以下である重合体(B)とを、質量比(A/B):57/43〜90/10で含有し、
前記重合体(A)が、アクリロニトリル又はメタアクリロニトリルに由来する構造単位を22質量%〜30質量%含む、
剥離速度10mm/minでの粘着力が1.0N/25mm以上の半導体ウェハ表面保護用粘着フィルム。
第一の重合工程の後に、前記重合体(A)及び前記重合体(B)の他方を形成するための原料モノマーを含有する第二重合用材料を前記反応容器にさらに供給して重合させる第二の重合工程と、を含む方法により得られる前記重合体(A)及び前記重合体(B)を含有する液を用いて前記粘着剤層が形成されてなる、前記<1>〜<3>のいずれか1項に記載の半導体ウェハ表面保護用粘着フィルム。
前記半導体ウェハ表面保護用粘着フィルムが貼着された前記半導体ウェハにおける回路非形成面を研削する研削工程と、
前記半導体ウェハ表面保護用粘着フィルムを前記半導体ウェハから剥離する剥離工程と、
を含む、半導体ウェハの保護方法。
前記半導体ウェハ表面保護用粘着フィルムが貼着された前記半導体ウェハにおける回路非形成面を研削する研削工程と、
前記半導体ウェハ表面保護用粘着フィルムを前記半導体ウェハから剥離する剥離工程と、
を含む、半導体装置の製造方法。
本発明の半導体ウェハ表面保護用粘着フィルム(以下、粘着フィルムと略称することもある)は、基材フィルムと、前記基材フィルムの片表面に粘着剤層と、を有し、前記粘着剤層が、動的粘弾性のtanδが最大となる温度(Ta)が0℃を超える重合体(A)と、動的粘弾性のtanδが最大となる温度(Tb)が0℃以下である重合体(B)とを、質量比(A/B):57/43〜90/10で含有し、前記重合体(A)が、アクリロニトリル又はメタアクリロニトリルに由来する構造単位を22質量%〜30質量%含む。このような構成の本発明の半導体ウェハ表面保護用粘着フィルムは、剥離速度10mm/minでの粘着力が1.0N/25mm以上である。
尚、粘着剤層は、基材フィルムの少なくとも片表面に有していればよく、両表面に有していてもよい。
第一重合用材料として重合体(A)を形成するためのモノマー原料を反応容器内に供給して重合させ、次に、第二重合用材料として重合体(B)を形成するためのモノマー原料を反応容器内に供給して重合させることが好ましい。
実施例、及び比較例における各粘着剤層を作製するときの塗工条件(乾燥温度、乾燥時間等)と同条件において、片表面にシリコーン処理が施されたPETフィルム[三井化学東セロ(株)製、商品名:SP−PET]の離型処理面側に各々の重合体のエマルション液を、塗布、乾燥し、乾燥後の厚みが50μm〜60μmの重合体層を形成する。得られた重合体層同士を順次重ね合わせ、厚み約1mm程度の重合体のフィルム状サンプルを得る。このフィルム状サンプルから、幅10mm、長さ50mm程度を切り出して試料とする。
下記に規定した条件以外は、全てJIS Z0237−1991に規定される方法に準じて測定した。23℃の雰囲気下において、実施例及び比較例で得られた表面保護用粘着フィルムを、その粘着剤層を介して5cm×20cmのSUS304−BA板(JIS G4305−1991規定)の表面に貼り付けて1時間放置する。放置後、粘着フィルムの一端を狭持し、剥離角度180度、所定の剥離速度でSUS304−BA板の表面から剥離する際の応力を引張試験機にて測定し、N/25mmに換算した。
集積回路が組み込まれた下記の半導体シリコンウェハを用いて評価した。
・ウェハ1:直径100mm、厚み725μm、スクライブライン;深さ10μm、幅400μm
・ウェハ2:直径100mm、厚み725μm、スクライブライン:深さ5μm、幅400μm
X線光電子分光分析装置((株)島津製作所製、商品名:ESCA−3200)にてシリコンミラーウェハチップ表面の汚染性を評価した。実施例及び比較例で得られた表面保護用粘着フィルムをその粘着剤層を介して異物が付着していないシリコンミラーウェハ(直径100mm、厚み600μm)の全面に貼り付けた状態で、23℃±2℃、相対湿度50±5%に調製された雰囲気中で1時間放置した後、表面保護用粘着フィルムをシリコンミラーウェハから剥し、次いでダイヤモンドグラスカッターを用いて、シリコンミラーウェハを1cm角に切断する。切断した1cm角のシリコンミラーウェハから無作為に5個を採取し、それらの表面に対してESCAによる分析を下記条件にて実施し、C/Si比(5個の平均値)を求めることによって、有機物による該チップ表面の汚染状態を測定した。
X線源;Mg−Kα線(1252.0eV)、X線出力;300W、測定真空度;2X10−7Pa以下、C/Si比;(炭素のピーク面積)/(珪素のピーク面積)。
表面保護用粘着フィルムを貼り付ける前のシリコンミラーウェハ表面のC/Si比は、0.10(ブランク値)である。したがって、表面保護用粘着フィルムを剥した後のシリコンミラーウェハ表面のC/Si比が0.10〜0.50の場合は汚染無し、それを超える場合は汚染有りと評価した。
<基材フィルムの作製>
エチレン−酢酸ビニル共重合体樹脂[三井・デュポンポリケミカル(株)製、商品名:エバフレックスV5961、酢酸ビニル単位含有量9質量%]をT−ダイ押出機を用いて、90μmの厚みに製膜し、粘着剤を塗布する側にコロナ処理を施した。得られたフィルムの厚みバラツキは±1.5%以内であった。
以下の実施例及び比較例中の「部」及び「%」は特に指定の無い限り、「質量部」及び「質量%」を表す。
得られた粘着剤主剤100部にエポキシ系架橋剤[ナガセケムテックス(株)製、商品名:デナコールEX−614B]0.5部とジエチレングリコールモノブチルエーテル2部を添加した後、10%アンモニア水を加えて粘度を3000mPa・s〜5000mPa・sとして粘着剤塗布液を得た。
リップコーターを用いて、上記粘着剤塗布液をポリプロピレンフィルム(離型フィルム、厚み50μm)に塗布し、90℃で10分乾燥して厚み80μmの粘着剤層を設けた。これに前述のエチレン−酢酸ビニル共重合体フィルム(基材フィルム)のコロナ処理側を貼り合わせ押圧して、粘着剤を基材フィルムに積層した。積層後、40℃において120時間加熱した後、室温まで冷却することにより表面保護用粘着フィルムを作製した。各種特性値の測定及び評価結果を[表2]に示す。
粘着剤主剤の作製において、第一段目の乳化物を作製するための単量体混合物を[表1]のそれぞれの実施例の欄に記載してあるように変更した以外は実施例1と同様に表面保護用粘着フィルムを作製した。各種特性値の測定及び評価結果を[表2]に示す。
基材フィルムに160μmに製膜したエチレン−酢酸ビニル共重合体樹脂[三井・デュポンポリケミカル(株)製、商品名:エバフレックスV5961、酢酸ビニル単位含有量9%]を使用し、粘着剤層を45μm(乾燥時間5分)とすること以外は、実施例3と同様に表面保護用粘着フィルムを作製した。各種特性値の測定及び評価結果を[表2]に示す。
撹拌機、還流冷却機、温度計及び窒素ガス導入口を備えた重合容器に、脱イオン水500部を入れて窒素ガス置換し、70℃〜72℃に昇温したのち、重合開始剤として過硫酸アンモニウム(以下重合開始剤(1)と略す)5部、水溶性単量体としてポリオキシエチレンノニルフェニルエーテル(エチレンオキサイドの付加モル数の平均値:約20)硫酸エステルアンモニウム塩のベンゼン環に重合性の1−プロペニル基を付加させた化合物[第一工業製薬(株)製、商品名:アクアロンHS−10](以下水溶性単量体(1)と略す)0.15部を入れる。
粘着剤主剤の作製において、第一段目の重合体(A)の乳化物を作製するための単量体混合物を[表1]のそれぞれの比較例の欄に記載してあるように変更した以外は実施例1と同様に表面保護用粘着フィルムを作製した。各種特性値の測定及び評価結果を[表3]に示す。
撹拌機、還流冷却機、温度計及び窒素ガス導入口を備えた重合容器に、脱イオン水500部を入れて窒素ガス置換し、70℃〜72℃に昇温したのち、重合開始剤として過硫酸アンモニウム(以下重合開始剤(1)と略す)5部、水溶性単量体としてポリオキシエチレンノニルフェニルエーテル(エチレンオキサイドの付加モル数の平均値:約20)硫酸エステルアンモニウム塩のベンゼン環に重合性の1−プロペニル基を付加させた化合物[第一工業製薬(株)製、商品名:アクアロンHS−10](以下水溶性単量体(1)と略す)0.15部を入れる。
撹拌機、還流冷却機、温度計及び窒素ガス導入口を備えた重合容器に、脱イオン水135部を入れて窒素ガス置換し、70℃〜72℃に昇温したのち、重合開始剤として4,4’−アゾビス−4−シアノバレリックアシッド[大塚化学(株)製、商品名:ACVA]0.5部、アクリル酸2−エチルヘキシル94部、メタクリル酸2部、アクリルアミド1部、n−ドデシルメルカプタン0.1部、水溶性単量体としてポリオキシエチレンノニルフェニルエーテル(エチレンオキサイドの付加モル数の平均値:約20)硫酸エステルアンモニウム塩のベンゼン環に重合性の1−プロペニル基を付加させた化合物[第一工業製薬(株)製、商品名:アクアロンHS−10]0.75部を入れる。9時間反応させ、アクリル系樹脂エマルションを得た。これを14%アンモニア水で中和(pH=7.0)し、固形分40.0%のアクリル系重合体とした。
n−BA:アクリル酸n−ブチル
AN:アクリロニトリル
AA:アクリル酸
AM:アクリルアミド
2EHA:2−エチルヘキシルアクリレート
本明細書に記載された全ての文献、特許出願、及び技術規格は、個々の文献、特許出願、及び技術規格が参照により取り込まれることが具体的かつ個々に記された場合と同程度に、本明細書中に参照により取り込まれる。
Claims (6)
- 基材フィルムと、
前記基材フィルムの片表面に粘着剤層と、を有し、
前記粘着剤層が、動的粘弾性のtanδが最大となる温度(Ta)が0℃を超える重合体(A)と、動的粘弾性のtanδが最大となる温度(Tb)が0℃以下である重合体(B)とを、質量比(A/B):57/43〜90/10で含有し、
前記重合体(A)が、アクリロニトリル又はメタアクリロニトリルに由来する構造単位を22質量%〜30質量%含む、
剥離速度10mm/minでの粘着力が1.0N/25mm以上であり、剥離速度10mm/min〜1000mm/minにおける粘着力が、4.0N/25mm以下である、半導体ウェハ表面保護用粘着フィルム。 - 前記基材フィルムが、エチレン−酢酸ビニル共重合体層、ポリオレフィン層及びポリエステル層から選択される少なくとも1種の層を含む、請求項1に記載の半導体ウェハ表面保護用粘着フィルム。
- 前記重合体(A)及び前記重合体(B)の一方を形成するための原料モノマーを含有する第一重合用材料を反応容器に供給して重合を開始させる第一の重合工程と、
第一の重合工程の後に、前記重合体(A)及び前記重合体(B)の他方を形成するための原料モノマーを含有する第二重合用材料を前記反応容器にさらに供給して重合させる第二の重合工程と、を含む方法により得られる前記重合体(A)及び前記重合体(B)を含有する液を用いて前記粘着剤層が形成されてなる、請求項1又は請求項2に記載の半導体ウェハ表面保護用粘着フィルム。 - 前記重合体(A)を含有する液と前記重合体(B)を含有する液とを混合した混合液を用いて前記粘着剤層が形成されてなる、請求項1又は請求項2に記載の半導体ウェハ表面保護用粘着フィルム。
- 半導体ウェハの回路形成面に、請求項1〜請求項4のいずれか1項に記載の半導体ウェハ表面保護用粘着フィルムにおける粘着剤層が接するように貼着する貼着工程と、
前記半導体ウェハ表面保護用粘着フィルムが貼着された前記半導体ウェハにおける回路非形成面を研削する研削工程と、
前記半導体ウェハ表面保護用粘着フィルムを前記半導体ウェハから剥離する剥離工程と、
を含む、半導体ウェハの保護方法。 - 半導体ウェハの回路形成面に、請求項1〜請求項4のいずれか1項に記載の半導体ウェハ表面保護用粘着フィルムにおける粘着剤層が接するように貼着する貼着工程と、
前記半導体ウェハ表面保護用粘着フィルムが貼着された前記半導体ウェハにおける回路非形成面を研削する研削工程と、
前記半導体ウェハ表面保護用粘着フィルムを前記半導体ウェハから剥離する剥離工程と、
を含む、半導体装置の製造方法。
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