WO2007049566A1 - 接着剤組成物および接着フィルム - Google Patents
接着剤組成物および接着フィルム Download PDFInfo
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- WO2007049566A1 WO2007049566A1 PCT/JP2006/321080 JP2006321080W WO2007049566A1 WO 2007049566 A1 WO2007049566 A1 WO 2007049566A1 JP 2006321080 W JP2006321080 W JP 2006321080W WO 2007049566 A1 WO2007049566 A1 WO 2007049566A1
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- Prior art keywords
- adhesive composition
- adhesive
- meth
- film
- semiconductor wafer
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Classifications
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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
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/27—Work carriers
- B24B37/30—Work carriers for single side lapping of plane surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/34—Accessories
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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
- 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
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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
- 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
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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]
- 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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- 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
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- 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
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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
- C09J2433/00—Presence of (meth)acrylic polymer
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- 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
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67132—Apparatus for placing on an insulating substrate, e.g. tape
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- 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
-
- 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
- H01L2221/6834—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 to protect an active side of a device or wafer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2852—Adhesive compositions
- Y10T428/2861—Adhesive compositions having readily strippable combined with readily readhearable properties [e.g., stick-ons, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2852—Adhesive compositions
- Y10T428/2878—Adhesive compositions including addition polymer from unsaturated monomer
- Y10T428/2891—Adhesive compositions including addition polymer from unsaturated monomer including addition polymer from alpha-beta unsaturated carboxylic acid [e.g., acrylic acid, methacrylic acid, etc.] Or derivative thereof
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31855—Of addition polymer from unsaturated monomers
- Y10T428/31935—Ester, halide or nitrile of addition polymer
Definitions
- the present invention relates to an adhesive composition, and more particularly, in order to hold and protect a product in a precision processing such as grinding of a semiconductor product such as a semiconductor wafer or an optical system product,
- the present invention relates to an adhesive composition and an adhesive film for temporarily fixing a protective substrate.
- the semiconductor wafer itself is thin and fragile, and the circuit pattern is uneven, so that it is easily damaged when an external force is applied during conveyance to the grinding process or dicing process.
- the polishing process in order to remove the generated polishing debris and remove the heat generated during polishing, the polishing process is performed while cleaning the backside of the semiconductor wafer with purified water. Therefore, it is necessary to prevent contamination of the circuit pattern surface. For this reason, in order to protect the circuit pattern surface of the semiconductor wafer and prevent the semiconductor wafer from being damaged, a processing adhesive sheet is adhered to the circuit pattern surface for grinding.
- a protective sheet is attached to the back side of the wafer, and the wafer is diced with the wafer bonded and fixed. The resulting chip is picked up from the film substrate for one dollar and then picked up and fixed on the die pad. I am letting.
- Examples of such precision processing pressure-sensitive adhesive sheets include base sheets such as polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), and ethylene acetate butyl copolymer (EV A).
- PET polyethylene terephthalate
- PE polyethylene
- PP polypropylene
- EV A ethylene acetate butyl copolymer
- a protective substrate in which a ladder type silicone oligomer is impregnated into an aluminum nitride-boron nitride pore sintered body is used, and this protective substrate and a semiconductor wafer are bonded using a thermoplastic film.
- a material such as alumina, aluminum nitride, boron nitride, or silicon carbide having a thermal expansion coefficient substantially the same as that of the semiconductor wafer is used as the protective substrate, and polyimide or the like is used as an adhesive for bonding the protective substrate and the semiconductor wafer.
- the composition of 10 ⁇ : LOO / zm thickness and spin coating of the adhesive composition and drying to 20 ⁇ m or less A method for making this film has been proposed (Patent Document 5).
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-173993
- Patent Document 2 Japanese Patent Laid-Open No. 2001-279208
- Patent Document 3 Japanese Patent Laid-Open No. 2003-292931
- Patent Document 4 Japanese Unexamined Patent Application Publication No. 2002-203821
- Patent Document 5 JP 2001-77304 A
- Patent Document 6 Japanese Patent Laid-Open No. 61-158145
- the adhesive composition that constitutes the adhesive layer of the protective tape disclosed in Patent Document 1 and Patent Document 2 has a problem of poor heat resistance that is not resistant to temperatures as high as 200 ° C. Also, gas is generated by heating, resulting in poor adhesion.
- the protection table disclosed in Patent Document 3 The adhesive composition that makes up the adhesive layer is an epoxy resin composition that cures at a temperature as high as 200 ° C, leaving a residue at the time of peeling, resulting in poor peeling. There is.
- the protective substrate (support plate) is made of alumina, aluminum nitride, boron nitride, silicon carbide or the like instead of the protective tape, automation of handling and conveyance can be achieved. It becomes possible.
- the thermoplastic film used for bonding the protective substrate and the semiconductor wafer could not prevent degassing due to moisture absorption, resulting in poor bonding.
- Patent Document 6 a mirror surface process using an etching liquid and a metal film formation process under a vacuum environment are performed in addition to grinding a semiconductor wafer. Heat resistance, etching resistance, peel resistance, and crack resistance are required for the adhesive composition for adhering the adhesive.
- This Patent Document 6 describes the composition of the adhesive composition! Is completely disclosed!
- an adhesive composition considered to be suitable for the above-mentioned field is preferred because it has good acrylic resin material strength and crack resistance.
- an adhesive composition using an acrylic material having such excellent characteristics is used.
- a substance insoluble in the stripping solution is formed on the adhesive layer after heating at 200 ° C. or higher, making stripping difficult.
- the present invention has been made in view of the above circumstances, and its purpose is to have a heat resistance of 200 ° C or higher, with less gas generated during heating and high alkali resistance, and peeling with a stripping solution.
- An object is to provide an easy-to-use adhesive composition and an adhesive film.
- the adhesive composition according to the first invention of the present application comprises: (a) styrene; (b) a cyclic skeleton-containing (meth) acrylate monomer; (c) a (meth) acrylate alkyl ester monomer. It is characterized by comprising an acrylic polymer as a main component.
- the adhesive composition according to the second invention of the present application is the adhesive composition according to the first invention of the present application, wherein (b) a cyclic skeleton-containing (meth) acrylate monomer is at least a ring skeleton.
- a cyclic skeleton-containing (meth) acrylic acid ester monomer (bl) having a substituent on the cyclic skeleton-containing (meth) acrylic acid ester monomer (b2) having no substituent on the ring skeleton It is characterized by becoming.
- the adhesive composition according to the third invention of the present application is the adhesive composition according to the first or second invention of the present application, wherein the carboxyl group concentration of the acrylic polymer is 1.0 mmol Zg or less. It is characterized by being.
- the adhesive composition according to the fourth invention of the present application is the adhesive composition according to any one of the first to third inventions of the present application, wherein the protective substrate for precision processing of a semiconductor wafer is used as a semiconductor wafer. It is an adhesive composition for bonding a protective substrate for semiconductor wafer precision processing used for bonding to a semiconductor wafer.
- a stripping solution used for stripping the protective substrate from the semiconductor wafer is described above. It has the SP value that is close to the solubility parameter (SP value) of acrylic polymer.
- the adhesive film according to the sixth invention of the present application has an adhesive composition layer formed of at least the adhesive composition according to any one of the first to fifth inventions of the present application on the support film. It is characterized by that.
- the adhesive composition according to the present invention includes (a) styrene, (b) a cyclic skeleton-containing (meth) acrylate monomer, (c) an alkyl (meth) acrylate. It is characterized by comprising an acrylic polymer composed of an ester monomer as a main component.
- the heat resistance (which does not deteriorate even at 200 ° C) can be improved by blending the (a) styrene.
- the blending amount of (a) styrene is preferably 30 to 90 parts by mass. Effective heat resistance is obtained when the amount is 30 parts by mass or more, and deterioration of crack resistance can be suppressed when the amount is 90 parts by mass or less.
- the blending amount of the acrylate monomer is preferably 5 to 60 parts by mass. Effective heat resistance is obtained when the amount is 5 parts by mass or more, and deterioration of peelability can be suppressed when the amount is 60 parts by mass or less.
- the flexibility and crack resistance of the adhesive layer can be ensured.
- the compounding amount of the alkyl ester monomer is preferably 10 to 60 parts by mass. When it is 10 parts by mass or more, effective flexibility and crack resistance can be obtained, and when it is 60 parts by mass or less, it is possible to suppress a decrease in hygroscopicity and heat resistance and to prevent poor peeling.
- the cyclic skeleton-containing (meth) acrylic acid ester monomer is a (meth) acrylic acid ester-derived monomer unit, and the hydrogen atom of the carboxyl group is a cyclic group or an alkyl group having a cyclic group. It has a structure that is replaced by! Or the cyclic skeleton-containing (meth) acrylic acid ester monomer is a monomer unit derived from (meth) acrylic acid ester force, wherein a hydrogen atom of a carboxyl group is substituted with an alkylol group, and an alkylol group In which a hydrogen atom is substituted with a cyclic group.
- cyclic group one or more hydrogen atoms are removed from benzene, naphthalene, or anthracene.
- monocyclic or polycyclic groups having aromaticity such as V and tan groups
- the following aliphatic cyclic groups can be exemplified.
- the cyclic group may or may not have a substituent on the ring skeleton.
- aliphatic cyclic group examples include groups in which one or more hydrogen atoms have been removed from a polycycloalkane such as monocycloalkane, dicycloalkane, tricycloalkane, tetracycloalkane, etc. Etc. can be illustrated. More specifically, monocycloalkanes such as cyclopentane and cyclohexane, and groups obtained by removing one or more hydrogen atoms from polycycloalkanes such as adamantane, norbornane, isobornane, tricyclodecane, tetracyclododecane, etc. Can be mentioned. In particular, a group obtained by removing one or more hydrogen atoms from cyclohexane or dicyclopentane (which may further have a substituent) is preferred.
- the cyclic group has a substituent on the ring skeleton
- it has a substituent on the ring skeleton, it preferably has the polar group and Z or the lower alkyl group.
- the alkyl group having a cyclic group is preferably an alkyl group having 1 to 12 carbon atoms and having the cyclic group.
- Examples of such a cyclic skeleton-containing (meth) acrylic acid ester monomer include cyclohexyl lu 2-propyl acrylate.
- the alkylol group is preferably an alkylol group having 1 to 4 carbon atoms.
- Examples of such a cyclic skeleton-containing (meth) acrylic acid ester monomer include phenoxycetyl acrylate and phenoxypropyl acrylate.
- aliphatic in the claims and the specification is a relative concept with respect to aromatics, and is defined to mean a group, a compound, or the like that does not have aromaticity.
- the “aliphatic cyclic group” means a monocyclic group or polycyclic group having no aromaticity. Except for the substituent of this “aliphatic cyclic group”, the basic ring structure is not limited to a group consisting of carbon and hydrogen (hydrocarbon group), but is a hydrocarbon group. I prefer that.
- the “hydrocarbon group” may be either saturated or unsaturated, but is usually preferably saturated. Furthermore, a polycyclic group is preferable.
- the adhesive composition of the present invention comprises (b) a cyclic skeleton-containing (meth) acrylic acid ester monomer having at least a cyclic skeleton-containing (meth) acrylic acid ester having a substituent on the cyclic skeleton.
- the component (b) consisting of the termonomer (b 1) and the cyclic skeleton-containing (meth) acrylic acid ester monomer (b2) having no substituent on the ring skeleton can be used.
- the (c) (meth) acrylic acid alkyl ester monomer comprises an acrylic long-chain alkyl ester having an alkyl group having 15 to 20 carbon atoms, and an acrylic alkyl ester having an alkyl group having 1 to 14 carbon atoms. Means.
- Examples of the acrylic long-chain alkyl ester having 15 to 20 carbon atoms of the alkyl group include an alkyl group of n-pentadecyl group, n-hexadecyl group, n-heptadecyl group, n-otatadecyl group, n Examples thereof include long-chain alkyl esters of acrylic acid or methacrylic acid comprising a nonadecyl group, n -eicosyl group, and the like.
- the long chain alkyl group may be a branched one.
- acrylic alkyl ester having 1 to 14 carbon atoms of the alkyl group include known ones used in conventional acrylic adhesives. Typical examples are alkyl, methyl, ethyl, propyl, butyl, 2-ethylhexyl, isooctyl, isononyl, isodecyl, dodecyl, lauryl, tridecyl, etc. And alkyl esters of acrylic acid or methacrylic acid.
- the carboxyl group concentration in the polymer is 1.0 mmol / g or less. It is desirable that When the carboxyl group is 1.0 mmol Zg or less, it is possible to suppress hygroscopicity and to suppress a decrease in adhesiveness due to a pseudo-crosslinking effect that is thought to be caused by hydrogen bonding between the carboxyl groups. In addition, it was confirmed that alkali resistance is improved by suppressing the carboxyl group concentration to a low value. Therefore, there is no possibility that the adhesive layer will be deteriorated even when an alkaline liquid comes into contact with it, so that the degree of freedom of the use range can be further expanded.
- the acrylic polymer preferably has a molecular weight of 5, 0. 00-500,000, more preferred ⁇ 10,000-100,000. Within these ranges, the flexibility and crack resistance of the formed adhesive layer become more effective.
- the adhesive composition of the present invention may contain morpholine such as acrylamide, such as dimethylacrylamide, as atoryloylmorpholine, as another additive component.
- morpholine such as acrylamide, such as dimethylacrylamide, as atoryloylmorpholine, as another additive component.
- the adhesive composition of the present invention includes, as desired, additional miscible additives, for example, an additional resin for improving the performance of the adhesive, as long as the essential properties are not impaired.
- additional miscible additives for example, an additional resin for improving the performance of the adhesive, as long as the essential properties are not impaired.
- plasticizers, adhesion assistants, stabilizers, colorants, surfactants, and the like can be added.
- the adhesive composition of the present invention can be appropriately mixed with an organic solvent for viscosity adjustment.
- organic solvent include ketones such as acetone, methyl ethyl ketone, cyclohexanone, methyl isoamyl ketone, and 2-heptanone; ethylene glycol, ethylene glycol monoacetate, diethylene glycol, diethylene glycol normonoacetate.
- Polyhydric alcohols such as propylene glycol, propylene glycol monoacetate, dipropylene glycol or dipropylene glycol monoacetate monomethyl ether, monoethyl ether, monopropyl ether, monobutyl ether or monophenyl ether and derivatives thereof; cyclic such as dioxane Ethers; and methyl lactate, ethyl lactate, methyl acetate, ethyl acetate, butyl acetate, methyl pyruvate, ethyl pyruvate, methoxy Mention may be made of esters such as methyl cypropionate and ethyl ethoxypropionate.
- polyhydric alcohols such as ethylene glycol, propylene glycol, polyethylene glycol, ethylene glycol monoacetate, propylene glycol monoacetate, diethylene glycol monoacetate or their monomethyl ether, monoethyl ether, monopropyl ether, monobutyl ether or monophenyl ether. And derivatives thereof are preferred.
- activators may be added to these to improve film thickness uniformity!
- the adhesive composition of the present invention is particularly suitable for bonding a protective substrate for precision processing of a semiconductor wafer used for bonding a protective substrate for precision processing of a semiconductor wafer to a semiconductor wafer.
- an adhesive composition for use By using it as an adhesive composition for use, an excellent effect is exhibited.
- it can be used as an adhesive layer of a protective tape, and in that case, excellent characteristics can be exhibited.
- the adhesive composition of the present invention changes the composition by selecting a stripping solution to ensure the required heat resistance and peelability.
- the stripping solution used for stripping the protective substrate from the semiconductor wafer has an SP value that is close to the solubility parameter (SP value) of the acrylic polymer, so that more excellent stripping property is achieved. Can be obtained.
- the SP value here is a value obtained by multiplying the cohesive energy density (cohesive energy density: evaporation energy per unit area of one molecule) to the power of 1Z2, and is a numerical value representing the magnitude of the polarity per unit volume. It is.
- the SP value of the acrylic polymer as the adhesive composition of the present invention is preferably 8.8 to 9.3 (cal / cm 3 ) 1/2 . 8.9 to 9.2 (cal / cm 3 ) 1 / 2 is more preferable.
- PGMEA SP value 9.2 is particularly preferable as a stripping solution in this range from the viewpoint of environmental load and stripping property.
- the SP value can be measured by various methods such as force that can be measured by a known method, Hildebrand, Small, Foy, Hansen ⁇ Krevelen, Fedors, Hoftyzer, etc. It is also possible to estimate by the known estimation method. In many cases, the SP value of the acrylic polymer is expressed as a weighted average of the SP values of the constituent monomers.
- the carboxyl group concentration can be 1.0 mmol Zg or less.
- the SP value can be controlled and good solubility according to the stripping solution can be obtained.
- the adhesive composition of the present invention as described above is a method of forming an adhesive composition layer by applying it on a workpiece in a liquid state according to the use, or on a flexible film in advance.
- a method of shifting adhesive film method
- this film dry film
- the adhesive film of the present invention is obtained by providing at least the adhesive composition layer of the present invention on a support film.
- a protective film is further coated on the adhesive composition layer, The protective film is peeled off from the adhesive composition layer, the exposed adhesive composition layer is stacked on the workpiece, and then the support film is peeled off from the adhesive composition layer so that the adhesive is applied onto the workpiece.
- a composition layer can be easily provided.
- the adhesive film of the present invention By using the adhesive film of the present invention, compared with the case where the adhesive composition layer is formed by applying the adhesive composition directly on the workpiece, the film thickness uniformity and the surface are improved. A layer having good smoothness can be formed.
- the adhesive composition layer formed on the support film can be easily peeled off from the support film, and each layer is protected on a protective substrate or wafer.
- Any release film can be used as long as it is a release film that can be transferred onto the surface to be processed, such as polyethylene terephthalate, polyethylene, polypropylene, polycarbonate, and polysalt polybule having a film thickness of 15 to 125 ⁇ m.
- a flexible film having a film strength can be mentioned. It is preferable that the support film is subjected to a release treatment so as to facilitate transfer, if necessary!
- the adhesive composition of the present invention is prepared, and an applicator, a nor coater, a wire bar coater, a ronore coater, a force ten flow coater, etc. are prepared.
- an applicator, a nor coater, a wire bar coater, a ronore coater, a force ten flow coater, etc. are prepared.
- LOOOm LOOOm
- a roll coater is preferable because it has excellent film thickness uniformity, and can be formed efficiently with a large thickness.
- a polyethylene terephthalate film, a polypropylene film, a polyethylene film, or the like having a thickness of about 15 to 125 ⁇ m coated or baked with silicone is suitable.
- the protective film is peeled off from the adhesive film, the exposed adhesive composition layer is overlaid on the workpiece, and the heating roller is moved from the support film to move the adhesive composition layer to the workpiece. Thermocompression-bonded to the surface.
- the protective film peeled off from the adhesive film can be reused if it is wound and stored in a roll with a roll-up roll.
- the adhesive composition of the present invention is used for adhesive applications as an adhesive composition, and is not particularly limited! /, But a protective substrate for precision processing of a semiconductor wafer is used as a semiconductor wafer, etc. It can be suitably used as an adhesive composition for bonding a protective substrate for semiconductor wafer precision processing for bonding to the substrate.
- the adhesive composition of the present invention can be suitably used for the method for attaching a substrate described in JP-A-2005-191550.
- this method is a method in which the circuit forming surface of the substrate is attached to a protective substrate (support plate) prior to the step of thinning a substrate such as a semiconductor wafer by grinding.
- a substrate such as a semiconductor wafer is thinned, the substrate is hardly cracked or chipped.
- An adhesive composition is applied to a circuit (element) forming surface of a semiconductor wafer, and this adhesive composition is pre-dried to reduce fluidity, thereby forming an adhesive composition layer.
- the temperature of the preliminary drying process is preferably 200 ° C or less.
- Pre-drying is performed by heating at 80 ° C for 5 minutes using an oven, for example.
- the thickness of the adhesive composition layer is determined according to the unevenness of the circuit formed on the surface of the semiconductor wafer.
- the application of the adhesive composition and preliminary drying may be repeated a plurality of times.
- a protective substrate is attached to the semiconductor wafer on which the adhesive composition layer having a predetermined thickness is formed.
- the adhesive composition is applied to a circuit forming surface of a substrate such as a semiconductor wafer by a spin coater, a bead portion that is raised one step at a peripheral portion may be formed. In this case, the bead portion can be removed with a solvent before the adhesive composition is pre-dried.
- the film thickness of the adhesive composition layer can be easily controlled by preliminary drying.
- the protective substrate is pressed against and integrated with the adhesive layer, and the adhesive layer is dried simultaneously with the pressing or after the pressing is completed.
- the temperature of this drying process is preferably 300 ° C or lower.
- the temperature of the preliminary drying step is 200 ° C or lower (40 to 200 ° C), and the temperature of the drying step is 300 ° C or lower (40 to 300 ° C). It can be.
- monohydric alcohols such as methanol, ethanol, propanol, isopropanol, butanol, and cyclics such as ⁇ -butyrolatatone Latatons
- ethers such as jetyl ether N-sol, dimethylformaldehyde, dimethylacetaldehyde, etc.
- a stripping solution mainly composed of propylene glycol monomethyl ether acetate ethyllatate is preferable in terms of environmental load and stripping property.
- the adhesive composition according to the present invention has a heat resistance of 200 ° C or higher, with less gas generated during heating (low hygroscopicity), high alkali resistance, Peeling with a stripping solution is easy. Even if it is used as an adhesive layer for a protective sheet that is not only a protective substrate, it can exhibit excellent protective properties and retention properties for the object to be processed.
- FIG. 1 is a graph showing a TDS measurement result of a coating film of an example.
- FIG. 2 is a graph showing a TDS measurement result of a coating film of a comparative example.
- the adhesive composition was applied on a 6-inch silicon wafer with lOOOrpm for 25 seconds using a spinner, and then heated on a hot plate under four types of heating conditions. Under these four heating conditions, the heating time was the same 3 minutes, and the heating temperatures were 110 ° C, 150 ° C, and 200 ° C. The film thickness was 15 / z m. The formed film surface was visually observed and applicability was determined according to the following evaluation criteria.
- the obtained coating film is uniform and uniform.
- the obtained coating film has unevenness such as pinholes and repellency.
- the dry paint film was visually observed for cracks, and evaluated with and without cracks at film thicknesses of 15 m and 20 ⁇ m. In both cases, X is indicated, and when the film thickness is 15 / z m, it is indicated as 20 / z m.
- Each adhesive composition of the above-mentioned examples and comparative examples was applied on a silicon wafer, the temperature of each coating film was raised from less than 50 ° C to 250 ° C, and the degassing amount from the film was measured. Evaluation was based on the amount of gas.
- the TDS method Thermal Desorption Spectroscopy, temperature programmed desorption analysis
- EMD-WA1000 manufactured by Electronic Science Co., Ltd. was used as the TDS measurement device (release gas measurement device).
- the evaluation of heat resistance is as follows. When the strength at 200 ° C (Indensity) is 10000 or less and the residue is not observed with a metal microscope, it is ⁇ . When the residue is not observed with a metal microscope, it is ⁇ .
- X was over 10,000 when the residue was observed with a metallurgical microscope.
- the hygroscopic evaluation was ⁇ when the strength at 100 ° C (Indensity) was 10,000 or less, and X when it was 10,000 or more.
- Example 1 Example 1
- FIG. 2 Comparative Example 1
- Example 2 to: L 1 also had the same graph shape as in FIG. 1 in the range of 0 to 200 ° C.
- the horizontal axis of the measurement graph is the temperature rise (measurement) temperature, and the vertical axis is the arbitrary intensity.
- Emult Volt is expressed as Electron Multiplyer Acceleration Voltage, which is generally expressed as Q-mass (quadrupole mass spectrometer) acceleration voltage.
- the reason why the heat resistance and hygroscopicity can be evaluated from this graph is as follows.
- the gas released up to 100 ° C is due to water vapor or their azeotropic gas, the low value of these values is evaluated as not absorbing moisture.
- the gas released at a temperature of 100 ° C or higher is a gas other than water vapor or their azeotropic gas, that is, a gas that is usually generated by resin, and the fact that there is little such gas is subject to decomposition by heat. It can be appreciated that! In particular, it is evaluated that the gas released at around 200 ° C (near the rise) is low! And is strong against thermal decomposition.
- the SP value of the acrylic polymer used in the adhesive composition was estimated using Truton's law and Hildebrand's formula.
- the SP value is a cohesive energy density, that is, a value obtained by multiplying the evaporation energy per unit volume of one molecule to the lZ square, and indicating the magnitude of the polarity per unit volume.
- the adhesive composition and the adhesive film according to the present invention generate less gas when heated (low hygroscopicity), and have high alkali resistance and heat resistance of 200 ° C or higher. And easy to peel off with a stripping solution. Even if it is used as an adhesive layer for a protective sheet that is not only a protective substrate, it can exhibit excellent protective properties and retention properties for the object to be processed.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Adhesive Tapes (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Dicing (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/090,343 US8163836B2 (en) | 2005-10-28 | 2006-10-23 | Adhesive composition and adhesive film |
DE200611003042 DE112006003042T5 (de) | 2005-10-28 | 2006-10-23 | Klebstoffzusammensetzung und Klebstofffilm |
CN2006800395809A CN101297010B (zh) | 2005-10-28 | 2006-10-23 | 粘接剂组合物以及粘接薄膜 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2005315282A JP5020496B2 (ja) | 2005-10-28 | 2005-10-28 | 接着剤組成物および接着フィルム |
JP2005-315282 | 2005-10-28 |
Publications (1)
Publication Number | Publication Date |
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WO2007049566A1 true WO2007049566A1 (ja) | 2007-05-03 |
Family
ID=37967678
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/321080 WO2007049566A1 (ja) | 2005-10-28 | 2006-10-23 | 接着剤組成物および接着フィルム |
Country Status (7)
Country | Link |
---|---|
US (1) | US8163836B2 (ja) |
JP (1) | JP5020496B2 (ja) |
KR (1) | KR20080049127A (ja) |
CN (1) | CN101297010B (ja) |
DE (1) | DE112006003042T5 (ja) |
TW (1) | TW200730597A (ja) |
WO (1) | WO2007049566A1 (ja) |
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WO2008029581A1 (fr) * | 2006-09-07 | 2008-03-13 | Tokyo Ohka Kogyo Co., Ltd. | Composition adhésive, film adhésif et procédé de production de la composition adhésive |
WO2008029584A1 (fr) * | 2006-09-07 | 2008-03-13 | Tokyo Ohka Kogyo Co., Ltd. | Composition adhésive, pellicule adhésive et procédé de production de cette composition adhésive |
WO2008029586A1 (fr) * | 2006-09-07 | 2008-03-13 | Tokyo Ohka Kogyo Co., Ltd. | Composition adhésive, pellicule adhésive et procédé de production de cette composition adhésive |
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WO2008029581A1 (fr) * | 2006-09-07 | 2008-03-13 | Tokyo Ohka Kogyo Co., Ltd. | Composition adhésive, film adhésif et procédé de production de la composition adhésive |
WO2008029584A1 (fr) * | 2006-09-07 | 2008-03-13 | Tokyo Ohka Kogyo Co., Ltd. | Composition adhésive, pellicule adhésive et procédé de production de cette composition adhésive |
WO2008029586A1 (fr) * | 2006-09-07 | 2008-03-13 | Tokyo Ohka Kogyo Co., Ltd. | Composition adhésive, pellicule adhésive et procédé de production de cette composition adhésive |
Also Published As
Publication number | Publication date |
---|---|
CN101297010A (zh) | 2008-10-29 |
KR20080049127A (ko) | 2008-06-03 |
JP5020496B2 (ja) | 2012-09-05 |
TW200730597A (en) | 2007-08-16 |
US20090137760A1 (en) | 2009-05-28 |
DE112006003042T5 (de) | 2008-09-25 |
JP2007119646A (ja) | 2007-05-17 |
CN101297010B (zh) | 2010-12-08 |
TWI338027B (ja) | 2011-03-01 |
US8163836B2 (en) | 2012-04-24 |
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