WO2015016352A1 - 接着剤組成物、接着シートおよび半導体装置の製造方法 - Google Patents
接着剤組成物、接着シートおよび半導体装置の製造方法 Download PDFInfo
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- WO2015016352A1 WO2015016352A1 PCT/JP2014/070364 JP2014070364W WO2015016352A1 WO 2015016352 A1 WO2015016352 A1 WO 2015016352A1 JP 2014070364 W JP2014070364 W JP 2014070364W WO 2015016352 A1 WO2015016352 A1 WO 2015016352A1
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- acrylic polymer
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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
- C09J133/062—Copolymers with monomers not covered by C09J133/06
- C09J133/066—Copolymers with monomers not covered by C09J133/06 containing -OH groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- 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
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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
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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
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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
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
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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
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
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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
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
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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
- C09J7/20—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
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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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- H10P10/128—
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- H10P54/00—
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- H10P72/7402—
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- 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
- C08F220/00—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 a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/20—Esters of polyhydric alcohols or phenols, e.g. 2-hydroxyethyl (meth)acrylate or glycerol mono-(meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2170/00—Compositions for adhesives
- C08G2170/40—Compositions for pressure-sensitive adhesives
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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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- 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
- C09J2463/00—Presence of epoxy resin
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/30—Technical effects
- H01L2924/35—Mechanical effects
- H01L2924/351—Thermal stress
- H01L2924/3512—Cracking
- H01L2924/35121—Peeling or delaminating
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- H10P72/7416—
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- H10W72/073—
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- H10W72/354—
Definitions
- the present invention is particularly suitable for use in a step of die bonding a semiconductor element (semiconductor chip) to an organic substrate or a lead frame and a step of dicing a silicon wafer or the like and die bonding a semiconductor chip to an organic substrate or a lead frame.
- the present invention relates to an adhesive composition, an adhesive sheet having an adhesive layer made of the adhesive composition, and a method of manufacturing a semiconductor device using the adhesive sheet.
- Semiconductor wafers such as silicon and gallium arsenide are manufactured in a large diameter state, and the wafer is cut and separated (diced) into element pieces (semiconductor chips) and then transferred to the next mounting process. At this time, the semiconductor wafer is subjected to dicing, cleaning, drying, expanding, and pick-up processes in a state where the semiconductor wafer is previously adhered to the adhesive sheet, and then transferred to the next bonding process.
- Patent Document 1 In order to simplify the processes of the pick-up process and the bonding process among these processes, various dicing / die-bonding adhesive sheets having both a wafer fixing function and a die bonding function have been proposed (Patent Document 1, etc.) ).
- the adhesive sheet disclosed in Patent Document 1 enables so-called direct die bonding, and the application step of the die bonding adhesive can be omitted.
- the physical properties required for semiconductor devices in recent years have become very strict.
- a surface mounting method (reflow) is performed in which the entire package is exposed to a high temperature equal to or higher than the solder melting point.
- the mounting temperature has increased to about 260 ° C. due to the shift to lead-free solder. For this reason, the stress generated inside the semiconductor package at the time of mounting becomes larger than before, and there is a high possibility of causing problems such as peeling at the adhesive interface and package cracks.
- Patent Document 1 discloses an acrylic polymer and epoxy having a weight average molecular weight (Mw) of 900,000 or more and a molecular weight distribution (Mw / Mn) of 7 or less, mainly for preventing adhesion between adhesive layers after dicing.
- An adhesive composition characterized by containing an epoxy resin and a thermosetting agent has been proposed.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2009-292888
- the inventors of the present invention have focused on controlling the molecular weight distribution of the acrylic polymer from the viewpoint of the polymerization method as a means for solving the problem of achieving high package reliability.
- the adhesive composition of Patent Document 1 increases the weight average molecular weight Mw to relatively reduce the content of low molecular weight components, thereby preventing the plasticization of the adhesive due to the low molecular weight components. , Preventing adhesion between adhesive layers.
- the molecular weight distribution of the acrylic polymer used in the adhesive disclosed in the examples of Patent Document 1 is relatively high, around 4, a weight average is necessary to sufficiently reduce the content of low molecular weight components.
- the molecular weight must be a large one of 1 million or more.
- the weight average molecular weight of the acrylic polymer is high, there is a concern that it does not follow the recent unevenness of the chip surface, which causes a decrease in adhesive strength. Further, since it is necessary to use an acrylic polymer having a high weight average molecular weight, the degree of freedom in designing the adhesive is narrowed.
- the present invention relates to an adhesive composition that can be bonded with sufficient adhesive strength, and in particular, can achieve high package reliability in a semiconductor device, an adhesive sheet having an adhesive layer made of the adhesive composition, and a semiconductor using the adhesive sheet It is an object of the present invention to provide a device manufacturing method.
- the present invention for solving the above problems includes the following gist.
- a single-layer adhesive film comprising the adhesive composition according to any one of (1) to (5) above.
- a semiconductor wafer is affixed to the adhesive layer of the adhesive sheet described in (7) above, and the semiconductor wafer is diced to form a semiconductor chip, and the adhesive layer remains fixed on the semiconductor chip and is peeled off from the support.
- a method of manufacturing a semiconductor device comprising: adhering the semiconductor chip onto a die pad portion or another semiconductor chip via the adhesive layer.
- the adhesive sheet according to the present invention When fixing the semiconductor chip, by using the adhesive sheet according to the present invention, it is possible to bond with sufficient adhesive strength and to obtain a semiconductor device exhibiting high package reliability even under harsh environments. .
- the adhesive composition of the present invention the adhesive sheet, and a method for producing a semiconductor device using the sheet will be described more specifically.
- the adhesive composition according to the present invention is an acrylic polymer (A) (hereinafter also referred to as “component (A)”. The same applies to other components), an epoxy resin (B) (hereinafter referred to as “compound (B)”. ) “Or” component (B) "), the thermosetting agent (C) is included as an essential component, and other components may be included as necessary in order to improve various physical properties.
- component (A) hereinafter also referred to as “component (A)”.
- component (B) hereinafter referred to as “compound (B)”.
- compound (B) hereinafter referred to as “compound (B)”.
- the thermosetting agent (C) is included as an essential component, and other components may be included as necessary in order to improve various physical properties.
- each of these components will be described in detail.
- the acrylic polymer (A) has a weight average molecular weight (Mw) of 350,000 or more, preferably less than 2 million, more preferably 400,000 to 1,800,000, and even more preferably 600,000. ⁇ 1.5 million, particularly preferably 600,000 to 900,000. If the weight average molecular weight of the acrylic polymer is too low, package reliability may be impaired due to the fluidity of the low molecular weight component of the adhesive layer. On the other hand, if the weight average molecular weight of the acrylic polymer is too high, the adhesive layer may not be able to follow the irregularities on the substrate or chip surface, which may cause voids.
- Mw weight average molecular weight
- the acrylic polymer By setting the weight average molecular weight of the acrylic polymer within the above range, the acrylic polymer has appropriate flexibility, the adhesiveness of the adhesive layer to the adherend surface having high surface smoothness is improved, and the chip and The substrate or the chip and the chip can be firmly bonded. In addition, it is possible to prevent a decrease in package reliability due to low molecular weight components. Furthermore, the acrylic polymer (A) of the present invention can sufficiently reduce the content of the low molecular weight component without reducing the weight average molecular weight by reducing the molecular weight distribution as described later. .
- the molecular weight distribution (Mw / Mn) of the acrylic polymer (A) is preferably 3 or less, more preferably 2 or less, still more preferably 1.7 or less, and particularly preferably 1.5 or less.
- Acrylic polymers with a molecular weight distribution of 3 or less have a narrow molecular weight distribution even if the weight average molecular weight is high, so the content of low molecular weight components with high fluidity is low, and this low molecular weight component reduces the package reliability. There is a tendency that can be avoided.
- the lower limit of the molecular weight distribution is about 1.2 from the viewpoint of compatibility of each component.
- the weight average molecular weight (Mw), number average molecular weight (Mn) and molecular weight distribution (Mw / Mn) values of the acrylic polymer (A) are gel permeation chromatography (GPC) method (polystyrene standard). Therefore, it is a value when measured under the measurement conditions in the examples described later. Moreover, when using the crosslinking agent (D) mentioned later, the weight average molecular weight (Mw), number average molecular weight (Mn), and molecular weight distribution (Mw / Mn) of the acrylic polymer (A) are the same as those of the crosslinking agent (D). It is the value before the reaction.
- GPC gel permeation chromatography
- the glass transition temperature (Tg) of the acrylic polymer is preferably in the range of ⁇ 10 ° C. to 50 ° C., more preferably 0 ° C. to 40 ° C., and particularly preferably 0 ° C. to 30 ° C. If the glass transition temperature is too low, the peeling force between the adhesive layer and the support may increase and chip pickup failure may occur. If the glass transition temperature is too high, the adhesive force of the adhesive layer for fixing the wafer is insufficient. There is a risk.
- the monomer constituting the acrylic polymer (A) includes at least a (meth) acrylic acid ester monomer or a derivative thereof.
- (meth) acrylic acid ester monomers or derivatives thereof include (meth) acrylic acid alkyl esters having an alkyl group having 1 to 18 carbon atoms, such as methyl (meth) acrylate, ethyl (meth) acrylate, (meth) Examples thereof include propyl acrylate, butyl (meth) acrylate and the like, and (meth) acrylic acid esters having a cyclic skeleton, such as (meth) acrylic acid cycloalkyl ester, (meth) acrylic acid benzyl ester, isobornyl acrylate, di And cyclopentanyl acrylate, dicyclopentenyl acrylate, dicyclopentenyloxyethyl acrylate, imide acrylate, etc., and acrylic acid ester having a hydroxyl group, such as 2-hydroxyethyl
- the acrylic polymer (A) has a hydroxyl group other than a (meth) acrylic acid ester such as a monomer having a carboxyl group such as (meth) acrylic acid or itaconic acid, vinyl alcohol, N-methylol (meth) acrylamide or the like.
- a monomer having a carboxyl group such as (meth) acrylic acid or itaconic acid, vinyl alcohol, N-methylol (meth) acrylamide or the like.
- Monomers having (meth) acrylamide, vinyl acetate, acrylonitrile, styrene, and the like may be copolymerized.
- the acrylic polymer preferably has a functional group that reacts with the crosslinking agent (D) such as a hydroxyl group, an amino group, or a carboxyl group.
- a functional group that reacts with the crosslinking agent (D) on the acrylic polymer by selecting the above-mentioned acrylic acid ester having a hydroxyl group, monoethylamino (meth) acrylate, (meth) acrylic acid, etc. as the monomer constituting the coalescence (A) Groups can be introduced.
- the acrylic polymer (A) having a hydroxyl group is easy to introduce a hydroxyl group into the acrylic polymer (A), has good compatibility with the epoxy resin (B), and uses a crosslinking agent. Therefore, it is preferable because a cross-linked structure can be easily introduced.
- a plurality of types of acrylic polymers may be used in combination.
- the ratio of the mass of the monomer having a functional group that reacts with the crosslinking agent (D) to the total mass of the monomer constituting the acrylic polymer (A) is preferably about 1 to 20% by mass, and is 3 to 15% by mass. It is more preferable.
- the acrylic polymer (A) as described above is obtained by a method of living radical polymerization using an organic tellurium compound with the acrylic monomer as a polymerization initiator (hereinafter sometimes referred to as “TERP polymerization method”). It is.
- TERP polymerization method By adopting the living radical polymerization method, it becomes easy to adjust the molecular weight distribution (Mw / Mn) of the acrylic polymer (A), and the reliability of the semiconductor device using the adhesive composition of the present invention is improved. be able to.
- the controllability of the molecular weight is improved by adopting the TERP polymerization method. It is particularly suitable for obtaining a high molecular weight polymer.
- the tellurium-containing compound as such a living radical polymerization initiator the following compounds are preferably used.
- R 1 represents an alkyl group having 1 to 8 carbon atoms, an aryl group, a substituted aryl group or an aromatic heterocyclic group.
- R 2 and R 3 represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms.
- R 4 represents an aryl group, a substituted aryl group, an aromatic heterocyclic group, an acyl group, an oxycarbonyl group or a cyano group.
- R 1 Specific examples of the group represented by R 1 are as follows.
- Examples of the alkyl group having 1 to 8 carbon atoms include methyl group, ethyl group, n-propyl group, isopropyl group, cyclopropyl group, n-butyl group, sec-butyl group, tert-butyl group, cyclobutyl group, and n-pentyl.
- a preferred alkyl group is a linear or branched alkyl group having 1 to 4 carbon atoms, more preferably a methyl group or an ethyl group.
- aryl group a phenyl group, a naphthyl group, etc., as a substituted aryl group, a phenyl group having a substituent, a naphthyl group having a substituent, etc., as an aromatic heterocyclic group, a pyridyl group, furyl Group, thienyl group and the like.
- aryl groups are a phenyl group and a trifluoromethyl-substituted phenyl group. These substituents may be substituted one or two, and the para position or ortho position is preferable.
- Each group represented by R 2 and R 3 is specifically as follows.
- Examples of the alkyl group having 1 to 8 carbon atoms include those similar to the alkyl group represented by R 1 above.
- Each group represented by R 4 is specifically as follows.
- Examples of the aryl group, substituted aryl group, and aromatic heterocyclic group include the same groups as those described above for R 1 .
- Examples of the acyl group include a formyl group, an acetyl group, and a benzoyl group.
- a carboxyl group for example, a carboxyl group, a methoxycarbonyl group, an ethoxycarbonyl group, a propoxycarbonyl group, Examples thereof include an n-butoxycarbonyl group, a sec-butoxycarbonyl group, a tert-butoxycarbonyl group, an n-pentoxycarbonyl group, and a phenoxycarbonyl group.
- Preferred oxycarbonyl groups are a methoxycarbonyl group and an ethoxycarbonyl group.
- Each group represented by R 4 is preferably an aryl group, a substituted aryl group, or an oxycarbonyl group.
- a preferred aryl group is a phenyl group.
- Preferred examples of the substituted aryl group include a halogen atom substituted phenyl group and a trifluoromethyl substituted phenyl group.
- these substituents are preferably substituted by 1 to 5 groups.
- an alkoxy group or a trifluoromethyl group one or two substituents may be substituted.
- the para position or the ortho position is preferable, and in the case of two substitutions, the meta position is preferable.
- Preferred oxycarbonyl groups are a methoxycarbonyl group and an ethoxycarbonyl group.
- R 1 represents an alkyl group having 1 to 4 carbon atoms
- R 2 and R 3 represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.
- R 4 is preferably an aryl group, a substituted aryl group or an oxycarbonyl group.
- R 1 represents an alkyl group having 1 to 4 carbon atoms
- R 2 and R 3 represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms
- R 4 represents a phenyl group or a substituted phenyl group.
- a methoxycarbonyl group and an ethoxycarbonyl group are preferable.
- tellurium-containing compound represented by the general formula (1) is specifically as follows.
- Examples of tellurium-containing compounds include (methylterranyl-methyl) benzene, (1-methylterranyl-ethyl) benzene, (2-methylterranyl-propyl) benzene, 1-chloro-4- (methylterranyl-methyl) benzene, 1-hydroxy-4- (Methylterranyl-methyl) benzene, 1-methoxy-4- (methylterranyl-methyl) benzene, 1-amino-4- (methylterranyl-methyl) benzene, 1-nitro-4- (methylterranyl-methyl) benzene, 1-cyano- 4- (methylterranyl-methyl) benzene, 1-methylcarbonyl-4- (methylterranyl-methyl) benzene, 1-phenylcarbonyl-4- (methylterranyl-methyl) benzene, 1-methoxycarbonyl-4- (methylterranyl
- methyl teranyl, 1-methyl terranyl and 2-methyl terranyl moieties are changed to ethyl terranyl, 1-ethyl terranyl, 2-ethyl terranyl, butyl terranyl, 1-butyl terranyl and 2-butyl terranyl, respectively.
- tellurium-containing compounds represented by the general formula (1) may be used singly or in combination of two or more.
- ethyl-2-methyl-2-methylterranyl-propionate is employed as the tellurium-containing compound represented by the general formula (1)
- a synthesis method thereof is disclosed in JP 2011-74380 A Can be obtained at
- an azo polymerization initiator may be added as a polymerization accelerator in addition to the tellurium-containing compound.
- the azo polymerization initiator is not particularly limited as long as it is an initiator used for ordinary radical polymerization.
- 2,2′-azobis isobutyronitrile
- AIBN 2,2′-azobis ( 2-methylbutyronitrile)
- AMBN 2,2′-azobis (2,4-dimethylvaleronitrile)
- ADVN 1,1′-azobis (1-cyclohexanecarbonitrile)
- MAIB dimethyl-2 2,2′-azobisisobutyrate
- ACVA 4,4′-azobis (4-cyanovaleric acid)
- 1,1′-azobis (1-acetoxy-1-phenylethane 2,2 '-Azobis (2-methylbutyramide), 2,2'-azobis (4-methoxy-2,4-dimethylvaleronitrile), 2,2'-azobis (2-methylamidinopropane) dihydrochloride, 2, 2'-azobis [2- (2-imi Zolin-2-yl) propane], 2,2′-azobis [2-methyl-N- (2-hydroxyethyl) propionamide], 2,2′
- the azo polymerization initiator When used, it is preferably 0.01 to 100 mol, more preferably 0.1 to 100 mol, and still more preferably 0 to 1 mol of the tellurium-containing compound of the formula (1) used as the polymerization initiator. It is desirable to use at a ratio of 0.1 to 5 mol.
- the method for forming the acrylic polymer (A) by living radical polymerization is, for example, as follows.
- the mixture of monomers described above, the living radical polymerization initiator represented by the general formula (1) and, if desired, an azo polymerization initiator are mixed.
- the inert gas include nitrogen, argon, helium, and the like. Argon and nitrogen are preferable. Nitrogen is particularly preferable. What is necessary is just to adjust suitably the usage-amount of a living radical polymerization initiator shown by a monomer and General formula (1) with the molecular weight or molecular weight distribution of the target acrylic polymer (A).
- the preferred amount used is a value (unit of amount used) divided by the weight average molecular weight (Mw) of the acrylic polymer (A) for the purpose of summing the values obtained by multiplying the molecular weight of each monomer by the charge ratio. Is the number of moles). In some cases, the amount is about 0.3 to 3 times the value.
- Polymerization is usually carried out without a solvent, but an organic solvent generally used in radical polymerization may be used.
- solvents that can be used include benzene, toluene, N, N-dimethylformamide (DMF), dimethyl sulfoxide (DMSO), acetone, chloroform, carbon tetrachloride, tetrahydrofuran (THF), ethyl acetate, trifluoromethylbenzene, and the like.
- solvents that can be used include benzene, toluene, N, N-dimethylformamide (DMF), dimethyl sulfoxide (DMSO), acetone, chloroform, carbon tetrachloride, tetrahydrofuran (THF), ethyl acetate, trifluoromethylbenzene, and the like. Can be mentioned.
- An aqueous solvent can also be used, and examples thereof include water, methanol, ethanol, isopropanol, n-butanol, ethyl cellosolve, butyl cellosolve, 1-methoxy-2-propanol and the like.
- the amount of the solvent used may be appropriately adjusted.
- the solvent is 0.01 to 100 ml, preferably 0.05 to 10 ml, particularly preferably 0.05 to 0.5 ml per 1 g of the monomer. Is good.
- the reaction temperature and reaction time may be appropriately adjusted depending on the molecular weight or molecular weight distribution of the resulting acrylic polymer (A).
- the reaction is carried out at 60 to 150 ° C. for 5 to 100 hours.
- stirring is performed at 80 to 120 ° C. for 10 to 30 hours.
- the polymerization is usually carried out at normal pressure, but may be pressurized or reduced in pressure.
- the intended acrylic polymer (A) is purified as necessary by removing the solvent and residual monomers under reduced pressure, precipitation filtration, reprecipitation, column separation, or the like by a conventional method.
- the reaction treatment can be performed by any treatment method as long as there is no problem with the object.
- the following fractionation method can be adopted in order to make the proportion of the low molecular weight component having a weight average molecular weight Mw of 50,000 or less contained in the acrylic polymer (A) 0.1 mass% or less.
- an acrylic polymer in a lower alcohol such as methanol, ethanol, n-propanol or isopropanol
- an aliphatic hydrocarbon having 5 to 10 carbon atoms such as pentane, hexane or heptane, preferably 100 parts by mass of methanol or hexane.
- A is added at a ratio of about 1 to 30 parts by mass as a solid content, and stirred at room temperature to form a precipitate.
- the precipitate is subjected to solid-liquid separation by a method such as decantation and then used after washing with the lower alcohol or an aliphatic hydrocarbon having 5 to 10 carbon atoms.
- a method such as decantation and then used after washing with the lower alcohol or an aliphatic hydrocarbon having 5 to 10 carbon atoms.
- the ratio of the low molecular weight component having a molecular weight Mw of 50,000 or less in the acrylic polymer (A) can be made 0.1 mass% or less.
- an acrylic polymer (A) of a random copolymer can be obtained by using a mixture of monomers constituting the acrylic polymer (A). Regardless of the type of monomer, the random copolymer can provide a copolymer having a ratio (molar ratio) of monomers to be reacted.
- a tellurium-containing compound as a polymerization initiator, molecular weight control and molecular weight distribution control can be performed under very mild conditions. The molecular weight of the acrylic polymer (A) can be adjusted by the reaction time and the amount of the tellurium-containing compound.
- the blending ratio of the tellurium-containing compound to the monomer may be reduced and the polymerization time may be increased.
- reduction of the polymerization time can be achieved by increasing the polymerization temperature or adding the azo polymerization initiator.
- the polymerization temperature is too high, or if the amount of the azo polymerization initiator added is too large, the molecular weight distribution of the acrylic polymer (A) will be increased, so adjustment with it is necessary.
- the blending ratio of the acrylic polymer (A) in the total mass of the adhesive composition is preferably 35 to 90% by mass, more preferably 40 to 85% by mass, and 45 to 80% by mass. More preferably.
- the amount of the acrylic polymer (A) is limited as described above, the elasticity of the adhesive composition before curing is increased, and wire bonding is performed without curing the adhesive layer. There is a tendency that deformation of the adhesive layer is less likely to occur due to an impact at the time of bonding, and occurrence of defects is suppressed.
- the proportion of the acrylic polymer (A) in the adhesive composition is large, the weight average molecular weight (Mw) is 350,000 or more and the molecular weight distribution (Mw / Mn) is 3 or less.
- Mw weight average molecular weight
- Mn molecular weight distribution
- Epoxy-type thermosetting resin As an epoxy-type thermosetting resin (B), a conventionally well-known epoxy resin can be used. Specific examples of the epoxy thermosetting resin (B) include polyfunctional epoxy resins, biphenyl compounds, bisphenol A diglycidyl ether and hydrogenated products thereof, orthocresol novolac epoxy resins, dicyclopentadiene type epoxy resins. And biphenyl type epoxy resin, bisphenol A type epoxy resin, bisphenol F type epoxy resin, phenylene skeleton type epoxy resin and the like, and epoxy compounds having two or more functional groups in the molecule. These can be used individually by 1 type or in combination of 2 or more types.
- the adhesive composition preferably contains 1 to 100 parts by mass, more preferably 3 to 70 parts by mass of the epoxy thermosetting resin (B) with respect to 100 parts by mass of the acrylic polymer (A). Particularly preferred is 5 to 50 parts by mass.
- the content of the epoxy thermosetting resin (B) is in such a range, so that sufficient adhesiveness is maintained, the elasticity of the adhesive layer is maintained, and even in the state before curing, the wire There is a tendency that deformation of the adhesive layer is less likely to occur due to an impact at the time of bonding in the bonding process, and occurrence of defects is suppressed.
- thermosetting agent (C) functions as a curing agent for the epoxy thermosetting resin (B).
- Preferred examples of the thermosetting agent (C) include compounds having two or more functional groups capable of reacting with an epoxy group in one molecule.
- the functional group include a phenolic hydroxyl group, an alcoholic hydroxyl group, an amino group, a carboxyl group, and an acid anhydride. Of these, phenolic hydroxyl groups, amino groups, acid anhydrides and the like are preferable, and phenolic hydroxyl groups and amino groups are more preferable. More preferably, a phenolic hydroxyl group and an amino group are mentioned.
- phenolic curing agent examples include polyfunctional phenolic resins, biphenols, novolac type phenolic resins, dicyclopentadiene type phenolic resins, zylock type phenolic resins, and aralkylphenolic resins.
- amine curing agent is DICY (dicyandiamide). These can be used individually by 1 type or in mixture of 2 or more types.
- the content of the thermosetting agent (C) in the adhesive composition is preferably 0.1 to 500 parts by mass with respect to 100 parts by mass of the epoxy thermosetting resin (B), and 1 to 200 parts by mass. It is more preferable that If the content of the thermosetting agent (C) is small, the adhesiveness may not be obtained due to insufficient curing, and if it is excessive, the moisture absorption rate of the adhesive layer increases and the package reliability may be lowered.
- crosslinking agent (D) Crosslinking agent It is preferable to add a crosslinking agent (D) to the adhesive composition.
- the crosslinking agent (D) include organic polyvalent isocyanate compounds and organic polyvalent imine compounds.
- Living radical polymerization has a feature that the reaction at the active site is very gradual compared to free radical polymerization. That is, in free radical polymerization, since the reaction at the active site is very fast, it is considered that polymerization is performed from a monomer having high reactivity, and then a monomer having low reactivity is polymerized.
- the living radical polymerization since the reaction at the active site is slow, it is considered that the polymerization proceeds evenly without being affected by the reactivity of the monomer, resulting in an equivalent composition.
- the resulting acrylic polymer (A) reacts with the crosslinking agent (D).
- the monomer having the functional group to be absorbed is not taken into the polymer, and the probability that the molecule of the acrylic polymer (A) substantially having no functional group that reacts with the crosslinking agent (D) is generated is reduced.
- organic polyvalent isocyanate compound examples include aromatic polyvalent isocyanate compounds, aliphatic polyvalent isocyanate compounds, alicyclic polyvalent isocyanate compounds, trimers of these organic polyvalent isocyanate compounds, and these organic polyvalent isocyanate compounds. And a terminal isocyanate urethane prepolymer obtained by reacting a polyol compound with a polyol compound.
- organic polyvalent isocyanate compounds include 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 1,3-xylylene diisocyanate, 1,4-xylene diisocyanate, diphenylmethane-4,4′-diisocyanate, diphenylmethane -2,4'-diisocyanate, 3-methyldiphenylmethane diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, dicyclohexylmethane-4,4'-diisocyanate, dicyclohexylmethane-2,4'-diisocyanate, lysine isocyanate, and their polyols Adduct body is mentioned.
- the acrylic polymer (A) preferably has a hydroxyl group as a functional group that reacts with the crosslinking agent.
- the crosslinking agent has an isocyanate group and the acrylic polymer (A) has a hydroxyl group, a bond between the crosslinking agent and the acrylic polymer (A) is easily formed by the reaction of the isocyanate group and the hydroxyl group, and the adhesive is crosslinked.
- the structure can be introduced simply.
- organic polyvalent imine compound examples include N, N′-diphenylmethane-4,4′-bis (1-aziridinecarboxamide), trimethylolpropane-tri- ⁇ -aziridinylpropionate, tetramethylolmethane-tri - ⁇ -aziridinylpropionate and N, N′-toluene-2,4-bis (1-aziridinecarboxamide) triethylenemelamine can be mentioned.
- the acrylic polymer (A) When an organic polyvalent imine compound is used as a crosslinking agent, the acrylic polymer (A) preferably has a carboxyl group as a functional group that reacts with the crosslinking agent. Bonding occurs between them, and a crosslinked structure is introduced into the adhesive.
- the cross-linking agent (D) is usually 0.01 to 20 parts by mass, preferably 0.1 to 10 parts by mass, and more preferably 0 to 100 parts by mass of the acrylic polymer (A). Used in a ratio of 5 to 5 parts by mass.
- the adhesive composition can contain the following components in addition to the above components.
- the curing accelerator (E) is used to adjust the curing rate of the adhesive composition.
- the curing accelerator (E) is preferably used particularly when the epoxy thermosetting resin (B) and the thermosetting agent (C) are used in combination.
- Preferred curing accelerators include tertiary amines such as triethylenediamine, benzyldimethylamine, triethanolamine, dimethylaminoethanol, tris (dimethylaminomethyl) phenol; 2-methylimidazole, 2-phenylimidazole, 2-phenyl- Imidazoles such as 4-methylimidazole, 2-phenyl-4,5-dihydroxymethylimidazole and 2-phenyl-4-methyl-5-hydroxymethylimidazole; Organic phosphines such as tributylphosphine, diphenylphosphine and triphenylphosphine; And tetraphenylboron salts such as tetraphenylphosphonium tetraphenylborate and triphenylphosphinetetraphenylborate. These can be used individually by 1 type or in mixture of 2 or more types.
- the curing accelerator (E) is preferably 0.01 to 10 with respect to a total of 100 parts by mass of the epoxy thermosetting resin (B) and the thermosetting agent (C). It is contained in an amount of parts by mass, more preferably 0.1 to 1 part by mass.
- the curing accelerator (E) in an amount within the above range, it has excellent adhesive properties even when exposed to high temperatures and high humidity, and high package reliability even when exposed to severe reflow conditions. Sex can be achieved. If the content of the curing accelerator (E) is small, sufficient adhesive properties cannot be obtained due to insufficient curing, and if it is excessive, the curing accelerator having a high polarity will pass through the adhesive layer under high temperature and high humidity. There is concern that the reliability of the package may be reduced by moving to and segregating.
- the energy ray polymerizable compound may be mix
- the energy ray polymerizable compound (F) contains an energy ray polymerizable group and is polymerized and cured when irradiated with energy rays such as ultraviolet rays and electron beams.
- Specific examples of such energy beam polymerizable compounds (F) include trimethylolpropane triacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol monohydroxypentaacrylate, dipentaerythritol hexaacrylate, or 1,4.
- acrylate compounds such as butylene glycol diacrylate, 1,6-hexanediol diacrylate, polyethylene glycol diacrylate, oligoester acrylate, urethane acrylate oligomer, epoxy-modified acrylate, polyether acrylate and itaconic acid oligomer.
- a compound has at least one polymerizable double bond in the molecule, and usually has a weight average molecular weight of about 100 to 30,000, preferably about 300 to 10,000.
- the energy beam polymerizable compound (F) is used, the blending amount thereof is not particularly limited, but it is preferably used at a ratio of about 1 to 50% by mass in 100% by mass of the total solid content of the adhesive composition.
- the adhesive composition contains the above-mentioned energy beam polymerizable compound (F)
- the energy ray polymerizable compound is irradiated by irradiating energy rays such as ultraviolet rays. Harden.
- the photopolymerization initiator (G) in the adhesive layer, the polymerization curing time and the light irradiation amount can be reduced.
- photopolymerization initiator (G) examples include benzophenone, acetophenone, benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether, benzoin benzoic acid, benzoin methyl benzoate, and benzoin dimethyl ketal.
- a photoinitiator (G) can be used individually by 1 type or in combination of 2 or more types.
- the blending ratio thereof is preferably 0.1 to 10 parts by mass and preferably 1 to 5 parts by mass with respect to 100 parts by mass of the energy beam polymerizable compound (F). It is more preferable.
- the amount is less than 0.1 parts by mass, satisfactory pick-up property may not be obtained due to insufficient photopolymerization.
- the amount exceeds 10 parts by mass, a residue that does not contribute to photopolymerization is generated, and the curability of the adhesive layer is increased. It may be insufficient.
- the coupling agent (H) is a compound having a group capable of binding to an organic compound and a group capable of reacting with an inorganic compound, and bonding the coupling agent to an adherend of the adhesive layer. May be used to improve the property and adhesion. Moreover, the water resistance can be improved by using a coupling agent (H), without impairing the heat resistance of the hardened
- the group capable of binding to the organic compound of the coupling agent (H) is preferably a group that reacts with the functional group of the acrylic polymer (A), the epoxy thermosetting resin (B), or the like.
- a silane coupling agent is desirable.
- Such coupling agents include ⁇ -glycidoxypropyltrimethoxysilane, ⁇ -glycidoxypropylmethyldiethoxysilane, ⁇ - (3,4-epoxycyclohexyl) ethyltrimethoxysilane, ⁇ - (methacryloxypropyl).
- the coupling agent (H) When the coupling agent (H) is used, the coupling agent is usually 0 with respect to a total of 100 parts by mass of the acrylic polymer (A), the epoxy thermosetting resin (B), and the thermosetting agent (C). 1 to 20 parts by mass, preferably 0.2 to 10 parts by mass, more preferably 0.3 to 5 parts by mass. If the content of the coupling agent (H) is less than 0.1 parts by mass, the above effect may not be obtained, and if it exceeds 20 parts by mass, it may cause outgassing.
- inorganic filler (I) Inorganic filler
- the thermal expansion coefficient of the adhesive layer By blending the inorganic filler (I) into the adhesive composition, it becomes possible to adjust the thermal expansion coefficient of the adhesive layer, and after curing on a semiconductor chip, metal or organic substrate Package reliability can be improved by optimizing the thermal expansion coefficient of the adhesive layer. Moreover, it becomes possible to reduce the moisture absorption rate after hardening of an adhesive bond layer.
- Preferred inorganic fillers include powders such as silica, talc, calcium carbonate, titanium white, bengara, silicon carbide, boron nitride, beads formed by spheroidizing them, single crystal fibers, and glass fibers.
- silica filler is preferable.
- the said inorganic filler (I) can be used individually or in mixture of 2 or more types. When the inorganic filler (I) is used, the content thereof can be adjusted in the range of usually 0 to 80% by mass with respect to 100 parts by mass of the total solid content of the adhesive composition.
- additives may be blended in the adhesive composition as necessary.
- Various additives include plasticizers, antistatic agents, antioxidants, pigments, dyes, gettering agents and the like.
- the adhesive layer made of the adhesive composition comprising the above components has pressure-sensitive adhesiveness and heat-curing property, and has a function of temporarily holding various adherends in an uncured state. Finally, a cured product having high impact resistance can be obtained through heat curing, and it has excellent shear strength and can maintain sufficient adhesive properties even under severe high temperature and high humidity conditions.
- the adhesive layer may be a single-layer adhesive sheet formed by forming the above-mentioned adhesive composition, but preferably the adhesive layer made of the above-mentioned adhesive composition is formed on the support so as to be peelable. This is an adhesive sheet.
- Adhesive sheet In which an adhesive layer is detachably formed on a support.
- the adhesive layer is adhered to an adherend such as a wafer or chip, the support is peeled off, and the adhesive layer is attached. Transfer to the body.
- the shape of the adhesive sheet according to the present invention can be any shape such as a tape shape or a label shape.
- the support for the adhesive sheet examples include polyethylene film, polypropylene film, polybutene film, polybutadiene film, polymethylpentene film, polyvinyl chloride film, vinyl chloride copolymer film, polyethylene terephthalate film, polyethylene naphthalate film, and polybutylene.
- the adhesive sheet according to the present invention is affixed to various adherends, and after subjecting the adherend to necessary processing, the adhesive layer is left on the adherend to be peeled off from the support. That is, it is used for a process including a step of transferring an adhesive layer from a support to an adherend.
- the surface tension of the surface in contact with the adhesive layer of the support is preferably 40 mN / m or less, more preferably 37 mN / m or less, and particularly preferably 35 mN / m or less. It is.
- the lower limit is usually about 25 mN / m.
- Such a support having a low surface tension can be obtained by appropriately selecting the material, and can also be obtained by applying a release agent to the surface of the support and performing a release treatment.
- alkyd type, silicone type, fluorine type, unsaturated polyester type, polyolefin type, wax type, etc. are used, and in particular, alkyd type, silicone type, fluorine type release agent. Is preferable because it has heat resistance.
- the release agent can be applied directly with a gravure coater, Mayer bar coater, air knife coater, roll coater, etc. without solvent, or by solvent dilution or emulsion.
- the laminate may be formed by room temperature or heating or electron beam curing, wet lamination, dry lamination, hot melt lamination, melt extrusion lamination, coextrusion processing, or the like.
- the support may be an adhesive sheet having an adhesive layer.
- the pressure-sensitive adhesive sheet has a pressure-sensitive adhesive layer on the resin film as described above, and the adhesive layer is detachably laminated on the pressure-sensitive adhesive layer. Therefore, the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet can be composed of a known pressure-sensitive adhesive having removability, and by selecting a pressure-sensitive adhesive such as an ultraviolet curable type, a heat-foaming type, a water swelling type, or a weakly viscous type. The adhesive layer can be easily peeled off.
- the adhesive sheet may have a shape in which the support and the adhesive layer are previously punched in the same shape as the adherend (semiconductor wafer or the like) or in a concentric shape larger than the wafer shape.
- the laminate composed of the support and the adhesive layer is preferably in a form held on a long support.
- the thickness of the support is usually 10 to 500 ⁇ m, preferably 15 to 300 ⁇ m, particularly preferably about 20 to 250 ⁇ m.
- the layer made of the adhesive usually occupies a thickness of about 1 to 50 ⁇ m in the thickness of the support.
- the thickness of the adhesive layer is usually 2 to 500 ⁇ m, preferably 6 to 300 ⁇ m, particularly preferably about 10 to 150 ⁇ m.
- a release film is laminated on the upper surface of the adhesive layer before use. It may be left.
- a release film one in which a release agent such as a silicone resin is applied to a plastic material such as a polyethylene terephthalate film or a polypropylene film is used.
- an adhesive layer or an adhesive tape may be separately provided on the outer peripheral portion of the surface of the adhesive sheet in order to fix other jigs such as a ring frame.
- the method for producing the adhesive sheet is not particularly limited, and may be produced by applying and drying an adhesive composition on a support to form an adhesive layer. You may manufacture by providing on the peeling film for protecting a layer, and transferring this to the said support body.
- a semiconductor wafer is attached to the adhesive layer of the adhesive sheet, the semiconductor wafer and the adhesive layer are diced into semiconductor chips, and the adhesive layer is formed on the back surface of the semiconductor chip. And a step of leaving the semiconductor chip on the die pad portion of the organic substrate or the lead frame, or placing the semiconductor chip on another semiconductor chip via an adhesive layer when the chip is stacked.
- a method for manufacturing a semiconductor device according to the present invention will be described in detail.
- a semiconductor wafer having a circuit formed on the front surface and a ground back surface is prepared.
- the semiconductor wafer may be a silicon wafer or a compound semiconductor wafer such as gallium / arsenic. Formation of a circuit on the wafer surface can be performed by various methods including conventionally used methods such as an etching method and a lift-off method. Next, the opposite surface (back surface) of the circuit surface of the semiconductor wafer is ground.
- the grinding method is not particularly limited, and grinding may be performed by a known means using a grinder or the like. At the time of back surface grinding, an adhesive sheet called a surface protection sheet is attached to the circuit surface in order to protect the circuit on the surface.
- the circuit surface side (that is, the surface protection sheet side) of the wafer is fixed by a chuck table or the like, and the back surface side on which no circuit is formed is ground by a grinder.
- the thickness of the wafer after grinding is not particularly limited, but is usually about 20 to 500 ⁇ m.
- the ring frame and the back side of the semiconductor wafer are placed on the adhesive layer of the adhesive sheet according to the present invention, lightly pressed, and heat is applied in some cases to fix the semiconductor wafer while softening the adhesive layer.
- the energy ray polymerizable compound (F) is blended in the adhesive layer, the energy ray polymerizable compound (F) is cured by irradiating the adhesive layer with energy rays from the support side.
- the cohesive force of the layer may be increased, and the adhesive force between the adhesive layer and the support may be reduced.
- the energy rays to be irradiated include ultraviolet rays (UV) and electron beams (EB), and preferably ultraviolet rays are used.
- the cutting depth at this time is a depth that takes into account the sum of the thickness of the semiconductor wafer and the adhesive layer and the wear of the dicing saw, and the adhesive layer is also cut to the same size as the chip.
- the energy beam irradiation may be performed at any stage after the semiconductor wafer is pasted and before the semiconductor chip is peeled off (pickup). For example, the irradiation may be performed after dicing or after the following expanding step. Good. Further, the energy beam irradiation may be performed in a plurality of times.
- the adhesive sheet is expanded, the interval between the semiconductor chips is expanded, and the semiconductor chips can be picked up more easily. At this time, a deviation occurs between the adhesive layer and the support, the adhesive force between the adhesive layer and the support is reduced, and the pick-up property of the semiconductor chip is improved.
- the cut adhesive layer can be adhered to the back surface of the semiconductor chip and peeled off from the support.
- the semiconductor chip is placed on the die pad of the lead frame which is the chip mounting portion or on the surface of another semiconductor chip (lower chip) through the adhesive layer.
- the chip mounting portion is heated before mounting the semiconductor chip or heated immediately after mounting.
- the heating temperature is usually 80 to 200 ° C., preferably 100 to 180 ° C.
- the heating time is usually 0.1 seconds to 5 minutes, preferably 0.5 seconds to 3 minutes.
- the pressure of the pressure at the time of mounting is usually 1 kPa to 200 MPa.
- the adhesive layer is removed by heating before resin sealing without waiting for the main curing of the adhesive layer using heating in resin sealing as described later. It may be cured.
- the heating conditions at this time are in the above heating temperature range, and the heating time is usually 1 to 180 minutes, preferably 10 to 120 minutes.
- the adhesive layer may be cured by using heat in resin sealing that is normally performed in package manufacturing, without temporarily performing the heat treatment after placement. Through such a process, the adhesive layer is cured, and the semiconductor chip and the chip mounting portion can be firmly bonded. Since the adhesive layer is fluidized under die-bonding conditions, the adhesive layer is sufficiently embedded in the unevenness of the chip mounting portion, and generation of voids can be prevented and the reliability of the package is improved. In this case, the semiconductor chip mounted on the chip mounting portion via the adhesive layer is subjected to a wire bonding step in a state before the adhesive layer is cured.
- the reaction of components contributing to the thermosetting of the adhesive layer partly proceeds due to heating in wire bonding, and there is a concern that the package reliability in the semiconductor device may be lowered.
- the adhesive composition of the present invention the adhesiveness of the adhesive layer to the chip tends to be improved, and the package reliability tends to be maintained.
- the adhesive composition and adhesive sheet of the present invention can be used for bonding semiconductor compounds, glass, ceramics, metals, etc., in addition to the above-described usage methods.
- the weight average molecular weight Mw and the number average molecular weight Mn in terms of standard polystyrene are measured by gel permeation chromatography (GPC), and the molecular weight distribution (Mw / Mn) is determined from the measured values. Asked. Measuring device: Tosoh's high-speed GPC device “HLC-8120GPC”, high-speed columns “TSK gold column H XL- H”, “TSK Gel GMH XL ”, “TSK Gel G2000 H XL ” ) In this order and measured. Column temperature: 40 ° C., liquid feed rate: 1.0 mL / min, detector: differential refractometer
- ⁇ IR reflow resistance evaluation> Manufacture of semiconductor chips
- the adhesive sheets of Examples and Comparative Examples were attached to the polished surface of a dry-polished silicon wafer (150 mm diameter, 75 ⁇ m thick) using a tape mounter (Adwill RAD2500, manufactured by Lintec Corporation) and fixed to a ring frame for wafer dicing. .
- the wafer was diced into a chip size of 8 mm ⁇ 8 mm using a dicing machine (Disco Corporation, DFD651). The amount of cut during dicing was such that the support was cut by 20 ⁇ m.
- a circuit pattern is formed on a copper foil (18 ⁇ m thickness) of a copper foil-clad laminate (CCL-HL830 manufactured by Mitsubishi Gas Chemical Co., Ltd.) as a substrate, and a solder resist (PSR-4000 AUS303 made by Taiyo Ink) is provided on the pattern.
- PSR-4000 AUS303 made by Taiyo Ink
- LN001E-001 PCB (Au) AUS303, manufactured by Chino Giken Co., Ltd. The chip on the adhesive sheet obtained above is picked up from the support together with the adhesive layer, and is pressure-bonded onto the substrate through the adhesive layer at 120 ° C., 250 gf, for 0.5 seconds, and further adhered onto the chip. Crimping was performed under the same conditions via an agent.
- Sealing was performed with a mold resin (KE-1100AS3 manufactured by Kyocera Chemical Co., Ltd.) so as to have a sealing thickness of 400 ⁇ m (sealing device MPC-06M TriAl Press manufactured by Apic Yamada Co., Ltd.), and the resin was cured at 175 ° C. for 5 hours.
- the sealed substrate is affixed to a dicing tape (Adwill D-510T manufactured by Lintec Co., Ltd.), and dicing into 8 mm x 8 mm size using a dicing apparatus (Disco Co., Ltd., DFD651). A semiconductor package for evaluation was obtained.
- the reactor was taken out of the glove box and dissolved in 500 ml of ethyl acetate, and then the polymer solution was passed through a column made of activated alumina [manufactured by Wako Pure Chemical Industries, Ltd.]. Ethyl acetate was added so that the viscosity of the polymer solution was 10,000 mPa ⁇ s (25 ° C.). The solid content of the obtained polymer was 17.3% by mass.
- the acrylic polymer (A-1) was synthesized by living radical polymerization in the same manner as the acrylic polymer (A-1) except that the addition amount of ethyl-2-methyl-2-n-butylteranyl-propionate and AIBN and the polymerization time were adjusted.
- A-2), (A-3), and (A-5) were produced.
- Adhesive composition Each component which comprises an adhesive composition is shown below.
- Table 2 was prepared by the free radical polymerization method in which the types and mass ratios of the acrylic polymer (A-6) and (A-7) monomers showing the weight average molecular weight and molecular weight distribution were the same as those in (A-1).
- C Thermosetting agent: Novolac type phenolic resin (Showon High Polymer Co., Ltd.
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Abstract
Description
本発明に係る接着剤組成物は、アクリル重合体(A)(以下「(A)成分」とも言う。他の成分についても同様である。)、エポキシ系樹脂(B)(以下「化合物(B)」または「(B)成分」とも言う。)、熱硬化剤(C)を必須成分として含み、各種物性を改良するため、必要に応じ他の成分を含んでいても良い。以下、これら各成分について具体的に説明する。
アクリル重合体(A)の重量平均分子量(Mw)は35万以上であり、好ましくは200万未満であり、より好ましくは40万~180万であり、さらに好ましくは60万~150万であり、特に好ましくは60万~90万である。アクリル重合体の重量平均分子量が低過ぎると、接着剤層の低分子量成分の流動性に起因して、パッケージ信頼性を損なうことがある。また、アクリル重合体の重量平均分子量が高過ぎると基板やチップ表面の凹凸へ接着剤層が追従できないことがありボイドなどの発生要因になる。アクリル重合体の重量平均分子量を上記範囲とすることで、アクリル重合体は適度な柔軟性を有し、表面平滑性が高い被着体表面に対する接着剤層の貼付性が向上して、チップと基板、あるいはチップとチップとを強固に接着することができる。また、低分子量成分に起因するパッケージ信頼性の低下を防止できる。さらに、本発明のアクリル重合体(A)は、後述するとおり分子量分布を小さくすることで、重量平均分子量を過大な範囲とすることなく、低分子量成分の含有量を十分に低減することができる。
例えば、 アクリル重合体(A)において、その中に含まれる重量平均分子量Mw5万以下の低分子量成分の割合を0.1質量%以下とするには、下記の分別法を採用することができる。まず、メタノール、エタノール、n-プロパノール、イソプロパノールなどの低級アルコール、もしくはペンタン、ヘキサン、ヘプタンなどの炭素数5~10の脂肪族炭化水素、好ましくはメタノールもしくはヘキサン100質量部中に、アクリル重合体(A)を、固形分として1~30質量部程度の割合で加え、室温でかきまぜて沈殿を形成させる。次いで、この沈殿物をデカンテーションなどの方法で固液分離したのち、前記低級アルコールもしくは炭素数5~10の脂肪族炭化水素で洗浄後使用する。この分別法により、アクリル重合体(A)中の分子量Mw5万以下の低分子量成分の割合を0.1質量%以下とすることができる。
エポキシ系熱硬化性樹脂(B)としては、従来公知のエポキシ樹脂を用いることができる。エポキシ系熱硬化性樹脂(B)としては、具体的には、多官能系エポキシ樹脂や、ビフェニル化合物、ビスフェノールAジグリシジルエーテルやその水添物、オルソクレゾールノボラックエポキシ樹脂、ジシクロペンタジエン型エポキシ樹脂、ビフェニル型エポキシ樹脂、ビスフェノールA型エポキシ樹脂、ビスフェノールF型エポキシ樹脂、フェニレン骨格型エポキシ樹脂など、分子中に2官能以上有するエポキシ化合物が挙げられる。これらは1種単独で、または2種以上を組み合わせて用いることができる。
熱硬化剤(C)は、エポキシ系熱硬化性樹脂(B)に対する硬化剤として機能する。好ましい熱硬化剤(C)としては、1分子中にエポキシ基と反応しうる官能基を2個以上有する化合物が挙げられる。その官能基としてはフェノール性水酸基、アルコール性水酸基、アミノ基、カルボキシル基および酸無水物などが挙げられる。これらのうち好ましくはフェノール性水酸基、アミノ基、酸無水物などが挙げられ、さらに好ましくはフェノール性水酸基、アミノ基が挙げられる。さらに好ましくはフェノール性水酸基、アミノ基が挙げられる。
接着剤組成物には、架橋剤(D)を添加することが好ましい。架橋剤(D)としては有機多価イソシアネート化合物、有機多価イミン化合物などが挙げられる。架橋構造の導入により、本発明の接着剤組成物を用いた半導体装置の信頼性が向上する。リビングラジカル重合はフリーラジカル重合と比較して活性点での反応が非常に緩やかであるという特徴を有する。すなわち、フリーラジカル重合では、活性点での反応が非常に早いために反応性の高い単量体から重合し、その後、反応性の低い単量体が重合するものと考えられている。一方、リビングラジカル重合では、活性点での反応が緩やかであるため、単量体の反応性の影響を受けずに均等に重合が進行し、均等な組成になるものと考えられる。かかるリビングラジカル重合の特徴の結果として、架橋剤(D)と反応する官能基を有する単量体を用いた場合に、得られたアクリル重合体(A)中に、架橋剤(D)と反応する官能基を有する単量体が重合体中に取り込まれず、架橋剤(D)と反応する官能基を実質的に有さないアクリル重合体(A)の分子が発生する確率が低減する。これにより、低分子量のアクリル重合体(A)の分子が存在したとしても、架橋剤との反応により三次元網目構造に取り込まれる可能性が高く、三次元網目構造に取り込まれずに残存した低分子量の重合体がパッケージ信頼性を損なう可能性も低減されると考えられる。
接着剤組成物は、上記成分に加えて下記成分を含むことができる。
硬化促進剤(E)は、接着剤組成物の硬化速度を調整するために用いられる。硬化促進剤(E)は、特に、エポキシ系熱硬化性樹脂(B)と熱硬化剤(C)とを併用する場合に好ましく用いられる。
接着剤組成物には、エネルギー線重合性化合物が配合されていてもよい。エネルギー線重合性化合物(F)は、エネルギー線重合性基を含み、紫外線、電子線等のエネルギー線の照射を受けると重合硬化する。このようなエネルギー線重合性化合物(F)として具体的には、トリメチロールプロパントリアクリレート、ペンタエリスリトールトリアクリレート、ペンタエリスリトールテトラアクリレート、ジペンタエリスリトールモノヒドロキシペンタアクリレート、ジペンタエリスリトールヘキサアクリレートあるいは1,4-ブチレングリコールジアクリレート、1,6-ヘキサンジオールジアクリレート、ポリエチレングリコールジアクリレート、オリゴエステルアクリレート、ウレタンアクリレート系オリゴマー、エポキシ変性アクリレート、ポリエーテルアクリレートおよびイタコン酸オリゴマーなどのアクリレート系化合物が挙げられる。このような化合物は、分子内に少なくとも1つの重合性二重結合を有し、通常は、重量平均分子量が100~30000、好ましくは300~10000程度である。エネルギー線重合性化合物(F)を用いる場合、その配合量は、特に限定はされないが、接着剤組成物の固形分全量100質量%中、1~50質量%程度の割合で用いることが好ましい。
接着剤組成物が、前述したエネルギー線重合性化合物(F)を含有する場合には、その使用に際して、紫外線等のエネルギー線を照射して、エネルギー線重合性化合物を硬化させる。この際、接着剤層中に光重合開始剤(G)を含有させることで、重合硬化時間ならびに光線照射量を少なくすることができる。
カップリング剤(H)は、有機化合物と結合しうる基と、無機化合物と反応しうる基を有する化合物であり、かかるカップリング剤を接着剤層の被着体に対する接着性、密着性を向上させるために用いてもよい。また、カップリング剤(H)を使用することで、接着剤層を硬化して得られる硬化物の耐熱性を損なうことなく、その耐水性を向上することができる。
無機充填材(I)を接着剤組成物に配合することにより、接着剤層の熱膨張係数を調整することが可能となり、半導体チップや金属または有機基板に対して硬化後の接着剤層の熱膨張係数を最適化することでパッケージ信頼性を向上させることができる。また、接着剤層の硬化後の吸湿率を低減させることも可能となる。
接着剤組成物には、上記の他に、必要に応じて各種添加剤が配合されてもよい。各種添加剤としては、可塑剤、帯電防止剤、酸化防止剤、顔料、染料、ゲッタリング剤などが挙げられる。
以下、接着剤層が支持体上に剥離可能に形成されてなる接着シートを例にとり、接着剤組成物の好適態様および使用態様について説明する。接着剤層が支持体上に剥離可能に形成されてなる接着シートの使用に際して、接着剤層をウエハ、チップ等の被着体に接着し、支持体を剥離して、接着剤層を被着体に転写する。本発明に係る接着シートの形状は、テープ状、ラベル状などあらゆる形状をとり得る。
本発明に係る半導体装置の製造方法は、上記接着シートの接着剤層に半導体ウエハを貼着し、該半導体ウエハおよび接着剤層をダイシングして半導体チップとし、該半導体チップ裏面に接着剤層を固着残存させて支持体から剥離し、該半導体チップを有機基板やリードフレームのダイパッド部上、またはチップを積層する場合に別の半導体チップ上に接着剤層を介して載置する工程を含む。
本発明に係る半導体装置の製造方法においては、まず、表面に回路が形成され、裏面が研削された半導体ウエハを準備する。
各例で使用するアクリル重合体について、ゲルパーミエーションクロマトグラフィー(GPC)法により、標準ポリスチレン換算の重量平均分子量Mw、数平均分子量Mnを測定し、また測定値から分子量分布(Mw/Mn)を求めた。
測定装置:東ソー社製の高速GPC装置「HLC-8120GPC」に、高速カラム「TSK gurd column HXL-H」、「TSK Gel GMHXL」、「TSK Gel G2000 HXL」(以上、全て東ソー社製)をこの順序で連結して測定した。
カラム温度:40℃、送液速度:1.0mL/分、検出器:示差屈折率計
(半導体チップの製造)
ドライポリッシュ仕上げシリコンウエハ(150mm径, 厚さ75μm)の研磨面に、実施例および比較例の接着シートの貼付をテープマウンター(リンテック社製, Adwill RAD2500)により行い、ウエハダイシング用リングフレームに固定した。次いで、ダイシング装置(株式会社ディスコ製, DFD651)を使用して8mm×8mmのチップサイズにダイシングした。ダイシングの際の切り込み量は、支持体を20μm切り込むようにした。
基板として銅箔張り積層板(三菱ガス化学株式会社製CCL-HL830)の銅箔(18μm厚)に回路パターンが形成され、パターン上にソルダーレジスト(太陽インキ製PSR-4000 AUS303)を有している基板を用いた(株式会社ちの技研製LN001E-001 PCB(Au)AUS303)。上記で得た接着シート上のチップを接着剤層とともに支持体から取り上げ、基板上に、接着剤層を介して120℃, 250gf, 0.5秒間の条件で圧着し、さらにチップの上に接着剤を介して同条件で圧着を行った。モールド樹脂(京セラケミカル株式会社製KE-1100AS3)で封止厚400μmになるように封止し (封止装置 アピックヤマダ株式会社製MPC-06M TriAl Press)、175℃5時間で樹脂を硬化させた。ついで、封止された基板をダイシングテープ(リンテック株式会社製Adwill D-510T)に貼付して、ダイシング装置(株式会社ディスコ製, DFD651)を使用して8mm×8mmサイズにダイシングすることで信頼性評価用の半導体パッケージを得た。
得られた半導体パッケージを85℃,60%RH条件下に168時間放置し、吸湿させた後、最高温度260℃加熱時間1分間のIRリフロー(リフロー炉:相模理工製WL-15-20DNX型)を3回行なった際に接合部の浮き・剥がれの有無、パッケージクラック発生の有無を走査型超音波探傷装置(日立建機ファインテック株式会社製Hye-Focus)および断面観察により評価した。基板/半導体チップ接合部に0.5mm以上の剥離を観察した場合を「不良」と判断して、パッケージを27個試験に投入し剥離が発生しなかった良品の個数を数えた。
単量体としてメチルアクリレート(MA、東京化成(株)製)と2-ヒドロキシエチルアクリレート(HEA、東京化成(株)製)とを、質量比95:5の割合で用い、以下のとおり重合を行い、MA/HEAのランダム共重合体からなるアクリル重合体(A-1)を製造した。まず、アルゴン置換したグローブボックス内で、エチル―2―メチル―2―n―ブチルテラニル―プロピオネート37.7μL、メチルアクリレート(同上)133g、2-ヒドロキシエチルアクリレート(同上)7.0g及び2,2’-アゾビス(イソブチルニトリル)(AIBN、大塚化学(株)製)8.1mgを60℃で20時間反応させた。
接着剤組成物を構成する各成分を下記に示す。
(A)アクリル重合体:
(A-1)~(A-3)上記の合成例により製造した、表2に示す重量平均分子量および分子量分布を示すアクリル重合体
(A-4)単量体の種類および質量割合が(A-1)と同じで、フリーラジカル重合法にて作製した表2に示す重量平均分子量および分子量分布を示すアクリル重合体
(A-5)上記のTERP法による合成例により製造した、表2に示す重量平均分子量および分子量分布を示すアクリル重合体
(A-6),(A-7)単量体の種類および質量割合が(A-1)と同じで、フリーラジカル重合法にて作製した表2に示す重量平均分子量および分子量分布を示すアクリル重合体
(B)エポキシ系熱硬化性化合物;ビスフェノールA型エポキシ樹脂(ジャパンエポキシレジン株式会社製エピコート828、エポキシ当量189g/eq)
(C)熱硬化剤;ノボラック型フェノール樹脂(昭和高分子株式会社製ショウノールBRG-556、フェノール性水酸基当量104g/eq)
(D)架橋剤;芳香族性ポリイソシアネート(日本ポリウレタン工業株式会社製コロネートL)
(E)硬化促進剤;イミダゾール(四国化成工業株式会社製キュアゾール2PHZ)
(H)カップリング剤;シランカップリング剤(三菱化学株式会社製MKCシリケートMSEP2)
(I-1)無機充填剤;日産化学社製 シリカゾルMEK-ST
(I-2)無機充填剤;日産化学社製 MEK-AC-4101
Claims (8)
- 有機テルル含有化合物を重合開始剤として用いるリビングラジカル重合法により、アクリル系モノマーを重合して得られる重量平均分子量(Mw)が35万以上のアクリル重合体(A)、エポキシ系熱硬化性樹脂(B)および熱硬化剤(C)を含む接着剤組成物。
- さらに架橋剤(D)を含有し、アクリル重合体(A)が該架橋剤と反応する官能基を有する請求項1に記載の接着剤組成物。
- 架橋剤(D)がイソシネート基を含有し、アクリル重合体(A)が水酸基を含有する請求項2に記載の接着剤組成物。
- アクリル重合体(A)の重量平均分子量(Mw)が90万以下である請求項1~3の何れかに記載の接着剤組成物。
- アクリル重合体(A)の分子量分布(Mw/Mn)が3以下である請求項1~4の何れかに記載の接着剤組成物。
- 請求項1~5の何れかに記載の接着剤組成物からなる単層接着フィルム。
- 請求項1~5の何れかに記載の接着剤組成物からなる接着剤層が、支持体上に形成されてなる接着シート。
- 請求項7に記載の接着シートの接着剤層に半導体ウエハを貼付し、前記半導体ウエハをダイシングして半導体チップとし、前記半導体チップに接着剤層を固着残存させて支持体から剥離し、前記半導体チップをダイパッド部上または他の半導体チップ上に前記接着剤層を介して接着する工程を含む半導体装置の製造方法。
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| JP2017090718A (ja) * | 2015-11-11 | 2017-05-25 | 旭化成株式会社 | ペリクル |
| WO2018117037A1 (ja) * | 2016-12-22 | 2018-06-28 | 日本ゼオン株式会社 | アクリルゴム、アクリルゴム組成物、アクリルゴム架橋物、及びアクリルゴムの製造方法 |
| WO2019082977A1 (ja) * | 2017-10-27 | 2019-05-02 | リンテック株式会社 | 保護膜形成用フィルム、保護膜形成用複合シート、及び半導体チップの製造方法 |
| WO2020129996A1 (ja) * | 2018-12-19 | 2020-06-25 | 日立化成株式会社 | フィルム状接着剤、接着シート、並びに半導体装置及びその製造方法 |
| WO2025041609A1 (ja) * | 2023-08-23 | 2025-02-27 | 株式会社レゾナック | 半導体装置製造用仮保護フィルム及び半導体装置の製造方法 |
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| KR20190055207A (ko) * | 2016-09-30 | 2019-05-22 | 닛토덴코 가부시키가이샤 | 광학용 점착제층, 광학용 점착제층의 제조 방법, 점착제층을 구비한 광학 필름, 및 화상 표시 장치 |
| WO2019150433A1 (ja) * | 2018-01-30 | 2019-08-08 | 日立化成株式会社 | 熱硬化性樹脂組成物、フィルム状接着剤、接着シート、及び半導体装置の製造方法 |
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- 2014-08-01 WO PCT/JP2014/070364 patent/WO2015016352A1/ja not_active Ceased
- 2014-08-01 TW TW103126350A patent/TWI654267B/zh active
- 2014-08-01 KR KR1020217014613A patent/KR102346224B1/ko active Active
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| WO2018117037A1 (ja) * | 2016-12-22 | 2018-06-28 | 日本ゼオン株式会社 | アクリルゴム、アクリルゴム組成物、アクリルゴム架橋物、及びアクリルゴムの製造方法 |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW201527459A (zh) | 2015-07-16 |
| KR102255547B1 (ko) | 2021-05-24 |
| KR102346224B1 (ko) | 2021-12-31 |
| JPWO2015016352A1 (ja) | 2017-03-02 |
| US20160160094A1 (en) | 2016-06-09 |
| SG11201600430WA (en) | 2016-02-26 |
| KR20210059025A (ko) | 2021-05-24 |
| CN105358647A (zh) | 2016-02-24 |
| TWI654267B (zh) | 2019-03-21 |
| US10131824B2 (en) | 2018-11-20 |
| KR20160039197A (ko) | 2016-04-08 |
| JP6340004B2 (ja) | 2018-06-06 |
| CN105358647B (zh) | 2017-10-24 |
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