JP2016216562A - Adhesive film, dicing tape-integrated adhesive film, double-layer film, method for producing semiconductor device, and semiconductor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adhesive film capable of reducing the voids in the vicinity of a bonding wire and capable of reducing squeeze-out, a dicing tape-integrated adhesive film including the adhesive film, and a double-layer film.SOLUTION: Provided is a double-layer film 1 including an adhesive film in which tanδ(loss elastic modulus G''/storage elastic modulus G') at 120°C at a frequency of 0.1 Hz is 0.7 to 2.0.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an adhesive film, a dicing tape-integrated adhesive film, a multilayer film, a semiconductor device manufacturing method, and a semiconductor device.

  A three-dimensional mounting technique is known as a technique that meets demands for higher functionality and miniaturization of semiconductor devices.

JP2013-30684A

  As shown in FIG. 12, a semiconductor device can be manufactured by a method including a step of pressure bonding a die bonding chip 2005 to a member 2006. Here, the die-bonding chip 2005 includes a semiconductor chip 2041 and a film adhesive 2111 disposed on the semiconductor chip 2041. The member 2006 includes an adherend 2606, a semiconductor chip 2641, and a bonding wire 2607 that connects the semiconductor chip 2641 and the adherend 2606. The adhesive layer 2611 is located between the semiconductor chip 2641 and the adherend 2606.

  In such a manufacturing method, a void may be generated around the bonding wire 2607. Since voids reduce the reliability of the semiconductor device, it is desirable to reduce the amount of voids. Further, when the die bonding chip 2005 is pressure-bonded to the member 2006, the film adhesive 2111 may protrude laterally.

  This invention solves the said subject, and it aims at providing the adhesive film which can reduce the void around a bonding wire and can reduce protrusion.

  Another object of the present invention is to provide a dicing tape-integrated adhesive film and a multilayer film including such an adhesive film. Another object of the present invention is to provide a method for manufacturing a semiconductor device using such an adhesive film. Another object of the present invention is to provide a semiconductor device obtained using such an adhesive film.

  The present invention relates to an adhesive film having a tan δ (loss elastic modulus G ″ / storage elastic modulus G ′) at 120 ° C. and a frequency of 0.1 Hz of 0.7 to 2.0. Since tan δ is 0.7 or more, the adhesive film of the present invention is soft at the time of die attachment. Therefore, voids around the bonding wire can be reduced. Since tan δ is 2.0 or less, the protrusion can be reduced.

  The storage elastic modulus G ′ at 120 ° C. and a frequency of 0.1 Hz in the adhesive film of the present invention is preferably 10,000 Pa or less. The loss elastic modulus G ″ at 120 ° C. and a frequency of 0.1 Hz is preferably 5000 Pa or less.

  The viscosity at 120 ° C. of the adhesive film of the present invention is preferably 2000 Pa · s or less.

  The present invention also relates to a dicing tape-integrated adhesive film. The dicing tape-integrated adhesive film of the present invention includes a dicing tape including a base material and a pressure-sensitive adhesive layer disposed on the base material, and an adhesive film disposed on the pressure-sensitive adhesive layer.

  The invention also relates to a multilayer film. The multilayer film of this invention contains a separator and the dicing tape integrated adhesive film arrange | positioned on the separator.

  The present invention also relates to a method for manufacturing a semiconductor device. The manufacturing method of the semiconductor device of this invention includes the process of preparing the member containing a to-be-adhered body, a 1st semiconductor chip, and a bonding wire. The bonding wire connects the first semiconductor chip and the adherend. The method for manufacturing a semiconductor device of the present invention includes a step of pressing a semiconductor wafer to an adhesive film, a step of pressing a semiconductor wafer to the adhesive film, a step of forming a die bonding chip by dividing the die, and a die bonding A step of crimping the chip to the member. The die bonding chip includes a second semiconductor chip and a film adhesive disposed on the second semiconductor chip.

  The present invention also relates to a semiconductor device.

It is a schematic plan view of a multilayer film. It is a schematic sectional drawing of a part of multilayer film. It is a schematic sectional drawing of the manufacturing process of a semiconductor device. It is a schematic sectional drawing of the manufacturing process of a semiconductor device. It is a schematic sectional drawing of the manufacturing process of a semiconductor device. It is a schematic sectional drawing of the manufacturing process of a semiconductor device. It is a schematic sectional drawing of the manufacturing process of a semiconductor device. It is a schematic sectional drawing of a part of multilayer film in modification 4. 10 is a schematic cross-sectional view of a manufacturing process of a semiconductor device in Modification 6. FIG. 10 is a schematic cross-sectional view of a manufacturing process of a semiconductor device in Modification 6. FIG. It is a schematic sectional drawing of the multilayer film in Embodiment 2. FIG. It is a schematic sectional drawing of the manufacturing process of a semiconductor device.

  The present invention will be described in detail below with reference to embodiments, but the present invention is not limited only to these embodiments.

[Embodiment 1]
(Multilayer film 1)
As shown in FIGS. 1 and 2, the multilayer film 1 includes a separator 13 and an adhesive film 11 disposed on the separator 13. More specifically, the multilayer film 1 includes a separator 13 and dicing tape integrated adhesive films 71a, 71b, 71c,..., 71m (hereinafter referred to as “dicing tape integrated adhesive film 71”) disposed on the separator 13. Generically). Distance between dicing tape integrated adhesive film 71a and dicing tape integrated adhesive film 71b, distance between dicing tape integrated adhesive film 71b and dicing tape integrated adhesive film 71c,... The distance between the dicing tape-integrated adhesive film 71m is constant. The multilayer film 1 can have a roll shape.

  The dicing tape-integrated adhesive film 71 includes the dicing tape 12 and the adhesive film 11 disposed on the dicing tape 12. The dicing tape 12 includes a base material 121 and an adhesive layer 122 arranged on the base material 121. The adhesive film 11 can be defined on both sides by a first main surface in contact with the pressure-sensitive adhesive layer 122 and a second main surface opposite to the first main surface. The second main surface is in contact with the separator 13.

(Adhesive film 11)
The adhesive film 11 has thermosetting properties. The adhesive film 11 further includes electrical insulation.

  The tan δ at 120 ° C. and the frequency of 0.1 Hz in the adhesive film 11 is 0.7 or more. Since it is 0.7 or more, the adhesive film 11 is soft at the time of die attach. Therefore, voids around the bonding wire can be reduced. On the other hand, tan δ at 120 ° C. and a frequency of 0.1 Hz in the adhesive film 11 is 2.0 or less. If it is 2.0 or less, the protrusion can be reduced. tan δ is preferably 1.9 or less. tan δ is the loss elastic modulus G ″ / storage elastic modulus G ′.

  The tan δ at 120 ° C. and the frequency of 0.1 Hz can be controlled by the filler content, the acrylic resin content, and the like. For example, tan δ can be lowered by reducing the filler content and the acrylic resin content.

  The storage elastic modulus G ′ at 120 ° C. and a frequency of 0.1 Hz is preferably 10,000 Pa or less, more preferably 8000 Pa or less, still more preferably 6000 Pa or less, and still more preferably 4000 Pa or less. The void around a bonding wire can be reduced as it is 10,000 Pa or less. The lower limit of the storage elastic modulus G ′ at 120 ° C. and a frequency of 0.1 Hz is, for example, 100 Pa, 200 Pa, or the like.

  The loss elastic modulus G ″ at 120 ° C. and a frequency of 0.1 Hz is preferably 5000 Pa or less, more preferably 3000 Pa or less. If it is 5000 Pa or less, the protrusion can be effectively reduced. The lower limit of the loss elastic modulus G ″ at 120 ° C. and a frequency of 0.1 Hz is, for example, 300 Pa, 400 Pa, or the like.

  The viscosity at 120 ° C. of the adhesive film 11 is preferably 2000 Pa · s or less, more preferably 1500 Pa · s or less, and further preferably 1300 Pa · s or less. If it is 2000 Pa · s or less, voids around the bonding wire can be reduced. The lower limit of the viscosity at 120 ° C. is, for example, 100 Pa · s, 300 Pa · s, or the like.

  The adhesive film 11 includes a resin component. Examples of the resin component include thermoplastic resins and thermosetting resins.

  The thermoplastic resin is preferably an acrylic resin.

  The acrylic resin is not particularly limited, and includes one or more esters of acrylic acid or methacrylic acid ester having a linear or branched alkyl group having 30 or less carbon atoms, particularly 4 to 18 carbon atoms. And a polymer (acrylic copolymer). Examples of the alkyl group include methyl group, ethyl group, propyl group, isopropyl group, n-butyl group, t-butyl group, isobutyl group, amyl group, isoamyl group, hexyl group, heptyl group, cyclohexyl group, 2- Examples include ethylhexyl group, octyl group, isooctyl group, nonyl group, isononyl group, decyl group, isodecyl group, undecyl group, lauryl group, tridecyl group, tetradecyl group, stearyl group, octadecyl group, and dodecyl group.

  In addition, the other monomer forming the polymer (acrylic copolymer) is not particularly limited, and for example, acrylic acid, methacrylic acid, carboxyethyl acrylate, carboxypentyl acrylate, itaconic acid, maleic acid, fumaric acid Or a carboxyl group-containing monomer such as crotonic acid, an acid anhydride monomer such as maleic anhydride or itaconic anhydride, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, (meth ) 4-hydroxybutyl acrylate, 6-hydroxyhexyl (meth) acrylate, 8-hydroxyoctyl (meth) acrylate, 10-hydroxydecyl (meth) acrylate, 12-hydroxylauryl (meth) acrylate or (4 -Hydroxymethyl cycle Hexyl) -hydroxyl group-containing monomers such as methyl acrylate, styrene sulfonic acid, allyl sulfonic acid, 2- (meth) acrylamide-2-methylpropane sulfonic acid, (meth) acrylamide propane sulfonic acid, sulfopropyl (meth) acrylate Alternatively, a sulfonic acid group-containing monomer such as (meth) acryloyloxynaphthalene sulfonic acid or the like, or a phosphoric acid group-containing monomer such as 2-hydroxyethylacryloyl phosphate may be used.

  Among the acrylic resins, those having a weight average molecular weight of 100,000 or more are preferable, those having 300,000 to 3,000,000 are more preferable, and those having 500,000 to 2,000,000 are more preferable. It is because it is excellent in adhesiveness and heat resistance in this numerical range. The weight average molecular weight is a value measured by GPC (gel permeation chromatography) and calculated in terms of polystyrene.

  The acrylic resin preferably contains a functional group capable of reacting with an epoxy group. Thereby, an acrylic resin and an epoxy resin can be bridge | crosslinked.

  Examples of the functional group capable of reacting with an epoxy group include a hydroxyl group and a carboxy group.

  Examples of the thermosetting resin include an epoxy resin and a phenol resin.

  The epoxy resin is not particularly limited. For example, bisphenol A type, bisphenol F type, bisphenol S type, brominated bisphenol A type, hydrogenated bisphenol A type, bisphenol AF type, biphenyl type, naphthalene type, fluorene type, phenol novolac type Bifunctional epoxy resins such as ortho-cresol novolak type, trishydroxyphenylmethane type, tetraphenylolethane type, etc., and epoxy resins such as hydantoin type, trisglycidyl isocyanurate type, or glycidylamine type are used. Of these epoxy resins, novolac type epoxy resins, biphenyl type epoxy resins, trishydroxyphenylmethane type resins or tetraphenylolethane type epoxy resins are particularly preferred. This is because these epoxy resins are rich in reactivity with a phenol resin as a curing agent and are excellent in heat resistance.

  Preferably, the resin component includes an epoxy resin that is solid at room temperature (hereinafter referred to as “first epoxy resin”).

The epoxy equivalent of the first epoxy resin is preferably 120 g / eq. Or more, more preferably 170 g / eq. That's it. The epoxy equivalent of the first epoxy resin is preferably 270 g / eq. Or less, more preferably 220 g / eq. It is as follows.
In addition, the epoxy equivalent of an epoxy resin can be measured by the method prescribed | regulated to JISK7236-2009.

  The content of the first epoxy resin in 100% by weight of the epoxy resin is preferably 10% by weight or more, more preferably 20% by weight or more, further preferably 30% by weight or more, and further preferably 40% by weight or more. The content of the first epoxy resin in 100% by weight of the epoxy resin is preferably 70% by weight or less, more preferably 60% by weight or less.

  Preferably, the resin component includes an epoxy resin that is liquid at room temperature (hereinafter referred to as “second epoxy resin”).

  The epoxy equivalent of the second epoxy resin is preferably 120 g / eq. Or more, more preferably 170 g / eq. That's it. The epoxy equivalent of the second epoxy resin is preferably 270 g / eq. Or less, more preferably 220 g / eq. It is as follows.

  In this specification, liquid at room temperature means that the viscosity at 25 ° C. is less than 5000 Pa · s. In addition, a viscosity can be measured by the model number HAAKE Roto VISCO1 made from Thermo Scientific.

  The content of the second epoxy resin in 100% by weight of the epoxy resin is preferably 30% by weight or more, more preferably 40% by weight or more. The content of the second epoxy resin in 100% by weight of the epoxy resin is preferably 90% by weight or less, more preferably 80% by weight or less, still more preferably 70% by weight or less, and further preferably 60% by weight or less.

  The phenol resin acts as a curing agent for the epoxy resin. For example, a novolak type phenol resin such as a phenol novolak resin, a phenol aralkyl resin, a cresol novolak resin, a tert-butylphenol novolak resin, a nonylphenol novolak resin, or a resol type phenol resin. And polyoxystyrene such as polyparaoxystyrene. Of these phenol resins, phenol novolac resins and phenol aralkyl resins are particularly preferred. This is because the connection reliability of the semiconductor device can be improved.

  Preferably, the phenolic resin is solid at room temperature.

  The hydroxyl equivalent of the phenol resin is preferably 120 g / eq. Or more, more preferably 170 g / eq. That's it. The hydroxyl equivalent of the phenol resin is preferably 270 g / eq. Or less, more preferably 220 g / eq. It is as follows.

  The blending ratio of the epoxy resin and the phenol resin is preferably blended so that the hydroxyl group in the phenol resin is 0.5 to 2.0 equivalents per equivalent of epoxy group in the epoxy resin component. More preferred is 0.8 to 1.2 equivalents. That is, if the blending ratio of both is out of this range, the sufficient curing reaction does not proceed and the properties of the cured product are likely to deteriorate.

  The content of the resin component in the adhesive film 11 is preferably 30% by weight or more, more preferably 40% by weight or more, and still more preferably 50% by weight or more. The content of the resin component in the adhesive film 11 is preferably 95% by weight or less.

  The content of the thermoplastic resin in the adhesive film 11 is preferably 5% by weight or more, more preferably 10% by weight or more. The content of the thermoplastic resin in the adhesive film 11 is preferably 70% by weight or less, more preferably 50% by weight or less, still more preferably 40% by weight or less, and further preferably 30% by weight or less.

  The total content of the epoxy resin and the phenol resin in the adhesive film 11 is preferably 30% by weight or more, more preferably 40% by weight or more. The total content of the epoxy resin and the phenol resin in the adhesive film 11 is preferably 80% by weight or less, more preferably 70% by weight or less.

  The adhesive film 11 preferably contains a filler. Preferably, the filler has electrical insulation.

  Examples of the filler include inorganic fillers and organic fillers. Of these, organic fillers are preferable. The organic filler makes it difficult to bend the bonding wire, and can reduce damage to the bonding wire and the semiconductor chip.

  Examples of the organic filler include a resin having a three-dimensional network structure. The organic filler is preferably a polymethyl methacrylate resin (hereinafter referred to as “PMMA resin”).

  The average particle diameter of the organic filler is preferably 0.01 μm or more, more preferably 0.1 μm or more, and further preferably 1 μm or more. When it is 0.01 μm or more, the fluidity of the adhesive film 11 is not significantly reduced. The average particle size of the organic filler is preferably 5 μm or less, more preferably 3 μm or less. When the thickness is 5 μm or less, surface roughness of the adhesive film 11 can be prevented. That is, it is possible to prevent the surface of the adhesive film 11 from being uneven. The average particle size of the organic filler can be determined by a photometric particle size distribution meter (manufactured by HORIBA, apparatus name: LA-910).

  When the thickness of the adhesive film 11 is 100%, the average particle size of the organic filler is preferably 50% or less. Surface roughness of the adhesive film 11 can be prevented as it is 50% or less. When the thickness of the adhesive film 11 is 100%, the average particle size of the organic filler is preferably 0.01% or more. If it is 0.01% or more, the fluidity of the adhesive film 11 does not greatly decrease.

  The maximum particle size of the organic filler is preferably 10 μm or less, more preferably 5 μm or less. The surface roughness of the adhesive film 11 can be prevented as it is 10 micrometers or less. The maximum particle size of the organic filler can be determined by a photometric particle size distribution meter (manufactured by HORIBA, apparatus name: LA-910).

  When the thickness of the adhesive film 11 is 100%, the maximum particle size of the organic filler is preferably 50% or less. Surface roughness of the adhesive film 11 can be prevented as it is 50% or less.

  In the particle size distribution of the organic filler, 90% or more of the organic filler is preferably present in the range of 0.01 μm to 5 μm. When 90% or more of the organic filler is present in this range, there are few coarse particles. Therefore, the surface roughness of the adhesive film 11 can be prevented.

  Examples of the shape of the organic filler include flakes, needles, filaments, spheres, and scales. A spherical shape is preferred because it can reduce scratches on the bonding wire and semiconductor chip.

  The content of the organic filler in the adhesive film 11 is preferably 5% by weight or more, more preferably 10% by weight or more. The content of the organic filler in the adhesive film 11 is preferably 60% by weight or less, more preferably 50% by weight or less.

  The inorganic filler is preferably silica.

  The average particle diameter of silica is preferably 0.01 μm or more, more preferably 0.1 μm or more. The average particle diameter of silica is preferably 10 μm or less, more preferably 2 μm or less. The average particle diameter of silica can be determined by a photometric particle size distribution meter (manufactured by HORIBA, apparatus name: LA-910).

  Examples of the shape of silica include flakes, needles, filaments, spheres, and scales. Of these, spherical is preferable.

  The content of the inorganic filler in the adhesive film 11 is preferably 5% by weight or more, more preferably 10% by weight or more. The content of the inorganic filler in the adhesive film 11 is preferably 60% by weight or less, more preferably 50% by weight or less.

  The adhesive film 11 preferably contains a curing accelerator. The content of the curing accelerator is preferably 0.1 to 5 parts by weight, more preferably 0.1 to 3 parts by weight with respect to 100 parts by weight of the resin component. It can be hardened in a short time as it is 0.1 weight part or more.

  The curing accelerator is not particularly limited, and examples thereof include imidazole compounds, triphenylphosphine compounds, amine compounds, triphenylborane compounds, and trihalogenborane compounds.

  Examples of imidazole compounds include 2-methylimidazole (trade name; 2MZ), 2-undecylimidazole (trade name; C11Z), 2-heptadecylimidazole (trade name; C17Z), and 1,2-dimethylimidazole (trade name). 1.2DMZ), 2-ethyl-4-methylimidazole (trade name; 2E4MZ), 2-phenylimidazole (trade name; 2PZ), 2-phenyl-4-methylimidazole (trade name; 2P4MZ), 1-benzyl 2-methylimidazole (trade name; 1B2MZ), 1-benzyl-2-phenylimidazole (trade name; 1B2PZ), 1-cyanoethyl-2-methylimidazole (trade name; 2MZ-CN), 1-cyanoethyl-2- Undecylimidazole (trade name; C11Z-CN), 1-cyanoethyl-2 Phenylimidazolium trimellitate (trade name; 2PZCNS-PW), 2,4-diamino-6- [2′-methylimidazolyl- (1 ′)]-ethyl-s-triazine (trade name; 2MZ-A), 2,4-diamino-6- [2′-undecylimidazolyl- (1 ′)]-ethyl-s-triazine (trade name; C11Z-A), 2,4-diamino-6- [2′-ethyl- 4′-Methylimidazolyl- (1 ′)]-ethyl-s-triazine (trade name; 2E4MZ-A), 2,4-diamino-6- [2′-methylimidazolyl- (1 ′)]-ethyl-s -Triazine isocyanuric acid adduct (trade name; 2MA-OK), 2-phenyl-4,5-dihydroxymethylimidazole (trade name; 2PHZ-PW), 2-phenyl-4-methyl-5-hydroxy Methylimidazole (trade name; 2P4MHZ-PW), and the like (all made by Shikoku Kasei Co., Ltd.).

  The triphenylphosphine compound is not particularly limited, and examples thereof include triorganophosphine such as triphenylphosphine, tributylphosphine, tri (p-methylphenyl) phosphine, tri (nonylphenyl) phosphine, diphenyltolylphosphine, and the like. , Tetraphenylphosphonium bromide (trade name; TPP-PB), methyltriphenylphosphonium (trade name; TPP-MB), methyltriphenylphosphonium chloride (trade name; TPP-MC), methoxymethyltriphenylphosphonium (trade name; TPP-MOC), benzyltriphenylphosphonium chloride (trade name; TPP-ZC), and the like (all manufactured by Hokuko Chemical Co., Ltd.).

  It does not specifically limit as a triphenylborane type compound, For example, a tri (p-methylphenyl) phosphine etc. are mentioned. The triphenylborane compound further includes those having a triphenylphosphine structure. The compound having a triphenylphosphine structure and a triphenylborane structure is not particularly limited. For example, tetraphenylphosphonium tetraphenylborate (trade name; TPP-K), tetraphenylphosphonium tetra-p-triborate (trade name; TPP) -MK), benzyltriphenylphosphonium tetraphenylborate (trade name; TPP-ZK), triphenylphosphine triphenylborane (trade name; TPP-S) and the like (all manufactured by Hokuko Chemical Co., Ltd.).

  The amino compound is not particularly limited, and examples thereof include monoethanolamine trifluoroborate (manufactured by Stella Chemifa Corporation), dicyandiamide (manufactured by Nacalai Tesque Corporation), and the like.

  The trihalogen borane compound is not particularly limited, and examples thereof include trichloroborane.

  In addition to the above components, the adhesive film 11 may appropriately contain a compounding agent generally used for film production, for example, a crosslinking agent.

  The adhesive film 11 can be manufactured by a normal method. For example, an adhesive composition solution containing each of the above components is prepared, and the adhesive composition solution is applied on a base separator so as to have a predetermined thickness to form a coating film, and then the coating film is dried. Thus, the adhesive film 11 can be manufactured.

  Although it does not specifically limit as a solvent used for adhesive composition solution, The organic solvent which can melt | dissolve, knead | mix or disperse | distribute each said component uniformly is preferable. Examples thereof include ketone solvents such as dimethylformamide, dimethylacetamide, N-methylpyrrolidone, acetone, methyl ethyl ketone, and cyclohexanone, toluene, xylene, and the like. The application method is not particularly limited. Examples of the solvent coating method include a die coater, a gravure coater, a roll coater, a reverse coater, a comma coater, a pipe doctor coater, and screen printing. Of these, a die coater is preferable in terms of high uniformity of coating thickness.

  As the base material separator, polyethylene terephthalate (PET), polyethylene, polypropylene, a plastic film or paper whose surface is coated with a release agent such as a fluorine-type release agent or a long-chain alkyl acrylate release agent can be used. Examples of the method for applying the adhesive composition solution include roll coating, screen coating, and gravure coating. Moreover, the drying conditions of a coating film are not specifically limited, For example, it can carry out in drying temperature 70-160 degreeC and drying time 1-5 minutes.

  As a method for producing the adhesive film 11, for example, a method of producing the adhesive film 11 by mixing the respective components with a mixer and press-molding the obtained mixture is also suitable. A planetary mixer etc. are mentioned as a mixer.

  The thickness of the adhesive film 11 is preferably 5 μm or more, more preferably 10 μm or more. The thickness of the adhesive film 11 is preferably 200 μm or less, more preferably 100 μm or less.

  The adhesive film 11 is used for manufacturing a semiconductor device.

(Separator 13)
Examples of the separator 13 include a polyethylene terephthalate (PET) film. The separator 13 is preferably subjected to a mold release process. The thickness of the separator 13 can be set as appropriate.

(Dicing tape integrated adhesive film 71)
The dicing tape-integrated adhesive film 71 includes the dicing tape 12 and the adhesive film 11 disposed on the dicing tape 12. The dicing tape 12 includes a base material 121 and an adhesive layer 122 arranged on the base material 121. The pressure-sensitive adhesive layer 122 includes a contact portion 122 </ b> A that contacts the adhesive film 11. The pressure-sensitive adhesive layer 122 further includes a peripheral portion 122B disposed around the contact portion 122A. The contact portion 122A is cured by radiation. On the other hand, the peripheral portion 122B has a property of being cured by radiation. As radiation, ultraviolet rays are preferable.

  It is preferable that the base material 121 has radiolucency. More preferably, the substrate 121 has ultraviolet transparency. Examples of the substrate 121 include paper-based substrates such as paper; fiber-based substrates such as cloth, nonwoven fabric, felt, and net; metal-based substrates such as metal foil and metal plates; plastics such as plastic films and sheets. Base materials: rubber base materials such as rubber sheets; foams such as foam sheets, and laminates thereof [particularly, laminates of plastic base materials and other base materials, or plastic films (or sheets) An appropriate thin leaf body such as a laminate of the above can be used. As the substrate 121, a plastic substrate such as a plastic film or sheet can be suitably used. Examples of such a plastic material include olefin resins such as polyethylene (PE), polypropylene (PP), and ethylene-propylene copolymer; ethylene-vinyl acetate copolymer (EVA), ionomer resin, ethylene- Copolymers containing ethylene as a monomer component such as (meth) acrylic acid copolymers and ethylene- (meth) acrylic acid ester (random, alternating) copolymers; polyethylene terephthalate (PET), polyethylene naphthalate (PEN), Polyesters such as polybutylene terephthalate (PBT); Acrylic resins; Polyvinyl chloride (PVC); Polyurethanes; Polycarbonates; Polyphenylene sulfide (PPS); Amides such as polyamides (nylons) and wholly aromatic polyamides (aramids) ; Polyetheretherketone (PEEK); polyimides; polyetherimides; polyvinylidene chloride; ABS (acrylonitrile - butadiene - styrene copolymer); cellulosic resins; silicone resins; and fluorine resins.

  The base material 121 may be used without stretching, or may be used after uniaxial or biaxial stretching treatment as necessary. By imparting heat shrinkability to the base material 121 by a stretching process or the like, the base material 121 is heat shrunk to reduce the adhesion area between the pressure-sensitive adhesive layer 122 and the adhesive film 11 and facilitate the collection of semiconductor elements. Can be achieved.

  The surface of the substrate 121 is chemically treated by conventional surface treatments such as chromic acid treatment, ozone exposure, flame exposure, high piezoelectric impact exposure, ionizing radiation treatment, etc., in order to enhance adhesion and retention with adjacent layers. Alternatively, a physical treatment or a coating treatment with a primer can be performed.

  As the base material 121, the same kind or different kinds can be appropriately selected and used, and if necessary, a blend of several kinds can be used. In addition, in order to impart antistatic ability to the base material 121, a deposited layer of a conductive material having a thickness of about 30 to 500 mm made of metal, an alloy, or an oxide thereof can be provided on the base material 121. . The substrate 121 may be a single layer or a multilayer of two or more types.

  The thickness of substrate 121 (total thickness in the case of a laminate) is not particularly limited and can be appropriately selected according to strength, flexibility, purpose of use, and the like. For example, it is generally 1000 μm or less (for example, 1 μm to 1000 μm). ), Preferably 10 μm to 500 μm, more preferably 20 μm to 300 μm, particularly about 30 μm to 200 μm, but is not limited thereto.

  Note that the base material 121 may contain various additives (coloring agent, filler, plasticizer, anti-aging agent, antioxidant, surfactant, flame retardant, and the like).

  The adhesive layer 122 is formed of an adhesive and has adhesiveness. Such an adhesive is not particularly limited, and can be appropriately selected from known adhesives. Specifically, examples of the adhesive include acrylic adhesive, rubber adhesive, vinyl alkyl ether adhesive, silicone adhesive, polyester adhesive, polyamide adhesive, urethane adhesive, fluorine Type adhesives, styrene-diene block copolymer adhesives, and known adhesives such as a creep property-improving adhesive in which a hot-melt resin having a melting point of about 200 ° C. or less is blended with these adhesives (for example, JP-A-56-61468, JP-A-61-174857, JP-A-63-17981, JP-A-56-13040, etc.) It can be selected and used. Moreover, as a pressure sensitive adhesive, a radiation curable pressure sensitive adhesive (or an energy ray curable pressure sensitive adhesive) or a thermally expandable pressure sensitive adhesive can be used. An adhesive can be used individually or in combination of 2 or more types.

  As the pressure-sensitive adhesive, an acrylic pressure-sensitive adhesive or a rubber-based pressure-sensitive adhesive can be suitably used, and an acrylic pressure-sensitive adhesive is particularly preferable. As an acrylic adhesive, an acrylic adhesive based on an acrylic polymer (homopolymer or copolymer) using one or more (meth) acrylic acid alkyl esters as monomer components. Agents.

  Examples of the (meth) acrylic acid alkyl ester in the acrylic pressure-sensitive adhesive include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate, (meth) acrylic acid Butyl, isobutyl (meth) acrylate, s-butyl (meth) acrylate, t-butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, (meta ) Octyl acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, nonyl (meth) acrylate, isononyl (meth) acrylate, decyl (meth) acrylate, isodecyl (meth) acrylate, ( Undecyl (meth) acrylate, dodecyl (meth) acrylate, (meth) Tridecyl crylate, tetradecyl (meth) acrylate, pentadecyl (meth) acrylate, hexadecyl (meth) acrylate, heptadecyl (meth) acrylate, octadecyl (meth) acrylate, nonadecyl (meth) acrylate, (meth) acrylic Examples include (meth) acrylic acid alkyl esters such as acid eicosyl. The (meth) acrylic acid alkyl ester is preferably a (meth) acrylic acid alkyl ester having 4 to 18 carbon atoms in the alkyl group. The alkyl group of the (meth) acrylic acid alkyl ester may be linear or branched.

  In addition, acrylic polymer is used for other monomer components (copolymerization) that can be copolymerized with (meth) acrylic acid alkyl ester as necessary for the purpose of modifying cohesive strength, heat resistance, crosslinkability, etc. Unit corresponding to the monomeric component). Examples of such copolymerizable monomer components include (meth) acrylic acid (acrylic acid, methacrylic acid), carboxyl such as carboxyethyl acrylate, carboxypentyl acrylate, itaconic acid, maleic acid, fumaric acid, and crotonic acid. Group-containing monomer; Acid anhydride group-containing monomer such as maleic anhydride, itaconic anhydride; hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, hydroxy (meth) acrylate Hydroxyl group-containing monomers such as hexyl, hydroxyoctyl (meth) acrylate, hydroxydecyl (meth) acrylate, hydroxylauryl (meth) acrylate, (4-hydroxymethylcyclohexyl) methyl methacrylate; styrene sulfonic acid Sulfonic acid group-containing monomers such as allylsulfonic acid, 2- (meth) acrylamide-2-methylpropanesulfonic acid, (meth) acrylamidepropanesulfonic acid, sulfopropyl (meth) acrylate, (meth) acryloyloxynaphthalenesulfonic acid; 2 -Phosphoric acid group-containing monomers such as hydroxyethyl acryloyl phosphate; (meth) acrylamide, N, N-dimethyl (meth) acrylamide, N-butyl (meth) acrylamide, N-methylol (meth) acrylamide, N-methylolpropane (meth) ) (N-substituted) amide monomers such as acrylamide; (meth) acrylic such as aminoethyl (meth) acrylate, N, N-dimethylaminoethyl (meth) acrylate, and t-butylaminoethyl (meth) acrylate acid Minoalkyl monomers; (meth) acrylic acid alkoxyalkyl monomers such as (meth) acrylic acid methoxyethyl and (meth) acrylic acid ethoxyethyl; acrylonitrile, methacrylonitrile and other cyanoacrylate monomers; (meth) acrylic acid glycidyl and the like Epoxy group-containing acrylic monomers; styrene monomers such as styrene and α-methylstyrene; vinyl ester monomers such as vinyl acetate and vinyl propionate; olefin monomers such as isoprene, butadiene and isobutylene; vinyl ether monomers such as vinyl ether; N-vinylpyrrolidone, methylvinylpyrrolidone, vinylpyridine, vinylpiperidone, vinylpyrimidine, vinylpiperazine, vinylpyrazine, vinylpyrrole, vinylimi Nitrogen-containing monomers such as sol, vinyl oxazole, vinyl morpholine, N-vinyl carboxylic acid amides, N-vinyl caprolactam; maleimide monomers such as N-cyclohexylmaleimide, N-isopropylmaleimide, N-laurylmaleimide, N-phenylmaleimide Itaconimide monomers such as N-methylitaconimide, N-ethylitaconimide, N-butylitaconimide, N-octylitaconimide, N-2-ethylhexitaconimide, N-cyclohexylitaconimide, N-laurylitaconimide; N- (meth) acryloyloxymethylenesuccinimide, N- (meth) acryloyl-6-oxyhexamethylenesuccinimide, N- (meth) acryloyl-8-oxyoctamethylenes Succinimide-based monomers such as synimide; glycol-based acrylic ester monomers such as (meth) acrylic acid polyethylene glycol, (meth) acrylic acid polypropylene glycol, (meth) acrylic acid methoxyethylene glycol, (meth) acrylic acid methoxypolypropylene glycol; ) Acrylic acid ester monomer having heterocycle such as tetrahydrofurfuryl acrylate, fluorine (meth) acrylate, silicone (meth) acrylate, halogen atom, silicon atom, etc .; hexanediol di (meth) acrylate, (poly) ethylene glycol Di (meth) acrylate, (poly) propylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, pentaerythritol di (meth) Acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, epoxy acrylate, polyester acrylate, urethane acrylate, divinylbenzene, butyldi (meth) acrylate, hexyldi (meth) Examples include polyfunctional monomers such as acrylate. These copolymerizable monomer components can be used alone or in combination of two or more.

  When a radiation curable pressure sensitive adhesive (or energy ray curable pressure sensitive adhesive) is used as the pressure sensitive adhesive, examples of the radiation curable pressure sensitive adhesive (composition) include a radical reactive carbon-carbon double bond as a polymer side chain or a main chain. Intrinsic radiation curable adhesives that use polymers in the chain or at the end of the main chain as the base polymer, and radiation curable adhesives that contain UV-curable monomer or oligomer components in the adhesive It is done. Moreover, when using a heat-expandable adhesive as an adhesive, as a heat-expandable adhesive, the heat-expandable adhesive containing an adhesive and a foaming agent (especially heat-expandable microsphere) etc. are mentioned, for example.

  The pressure-sensitive adhesive layer 122 includes various additives (for example, tackifier resins, colorants, thickeners, extenders, fillers, plasticizers, anti-aging agents, antioxidants, surfactants, cross-linking agents, etc.). be able to.

  The pressure-sensitive adhesive layer 122 is formed by using, for example, a conventional method of forming a sheet-like layer by mixing a pressure-sensitive adhesive (pressure-sensitive adhesive) and, if necessary, a solvent or other additives. be able to. Specifically, for example, a method of applying a mixture containing a pressure-sensitive adhesive and, if necessary, a solvent and other additives onto the base material 121, and applying the mixture onto an appropriate separator (such as a release paper) The pressure-sensitive adhesive layer 122 can be formed by a method of forming the agent layer 122 and transferring (transferring) it onto the substrate 121.

  The thickness of the pressure-sensitive adhesive layer 122 is preferably 1 μm or more, more preferably 2 μm or more, and further preferably 5 μm or more. The thickness of the pressure-sensitive adhesive layer 122 is preferably 100 μm or less, more preferably 50 μm or less, and further preferably 30 μm or less. The pressure-sensitive adhesive layer 122 may be either a single layer or multiple layers.

(Method for manufacturing semiconductor device)
As shown in FIG. 3, the semiconductor wafer 4 is pressure-bonded to the dicing tape-integrated adhesive film 71. Examples of the semiconductor wafer 4 include a silicon wafer, a silicon carbide wafer, and a compound semiconductor wafer. Examples of compound semiconductor wafers include gallium nitride wafers.

  Examples of the crimping method include a method of pressing with a pressing means such as a crimping roll.

The pressing temperature (sticking temperature) is preferably 35 ° C. or higher, and more preferably 37 ° C. or higher. The upper limit of the pressure bonding temperature is preferably lower, preferably 80 ° C. or lower, more preferably 70 ° C. or lower. By crimping at a low temperature, it is possible to prevent the thermal effect on the semiconductor wafer 4 and to suppress warping of the semiconductor wafer 4. Moreover, it is preferable that it is 1 * 10 < ⁵ > Pa-1 * 10 < ⁷ > Pa, and it is more preferable that a pressure is 2 * 10 < ⁵ > Pa-8 * 10 < ⁶ > Pa.

  As shown in FIG. 4, die bonding chips 5 are formed by dicing the semiconductor wafer 4. The die bonding chip 5 includes a semiconductor chip 41 and a film adhesive 111 disposed on the semiconductor chip 41. The semiconductor chip 41 includes electrode pads. Examples of the material for the electrode pad include aluminum. In this step, it is possible to employ a cutting method called full cut that cuts up to the dicing tape-integrated adhesive film 71. The dicing apparatus is not particularly limited, and a conventionally known apparatus can be used. Moreover, since the semiconductor wafer 4 is bonded and fixed by the dicing tape-integrated adhesive film 71, chip chipping and chip jumping can be suppressed, and damage to the semiconductor wafer 4 can also be suppressed.

  The die bonding chip 5 is picked up. The pickup method is not particularly limited, and various conventionally known methods can be employed. For example, a method of pushing up each semiconductor chip 41 with a needle from the dicing tape-integrated adhesive film 71 side and then picking up the die bonding chip 5 with a pickup device may be mentioned.

  As shown in FIG. 5, the member 6 is prepared. The member 6 includes an adherend 606, a semiconductor chip 641, and a bonding wire 607 that connects the semiconductor chip 641 and the adherend 606. More specifically, the member 6 connects the adherend 606, the adhesive layer 611 disposed on the adherend 606, the semiconductor chip 641 disposed on the adhesive layer 611, and the semiconductor chip 641 and the adherend 606. Bonding wire 607 to be included. The bonding wire 607 connects the electrode pad of the semiconductor chip 641 and the terminal of the adherend 606. That is, one end of the bonding wire 607 is in contact with the electrode pad of the semiconductor chip 41. The other end of the bonding wire 607 is in contact with the terminal of the adherend 606. Examples of the adherend 606 include a lead frame, a TAB film, and a substrate. Examples of the material of the bonding wire 607 include copper.

  As shown in FIG. 6, the composite member 2 is formed by press-bonding the die bonding chip 5 to the member 6. Specifically, the die bonding chip 5 is pressure-bonded to the semiconductor chip 641 of the member 6.

  The composite member 2 includes a member 6 and a die bonding chip 5 disposed on the member 6. Specifically, the composite member 2 includes an adherend 606, an adhesive layer 611 disposed on the adherend 606, a semiconductor chip 641 disposed on the adhesive layer 611, and a film shape disposed on the semiconductor chip 641. An adhesive 111, a semiconductor chip 41 arranged on the film adhesive 111, and a bonding wire 607 having a portion embedded in the film adhesive 111 are included. The bonding wire 607 connects the semiconductor chip 641 and the adherend 606. One end of the bonding wire 607 is in contact with the electrode pad of the semiconductor chip 41. The other end of the bonding wire 607 is in contact with the terminal of the adherend 606. The other end of the bonding wire 607 does not contact the film adhesive 111.

  The temperature for press-bonding the die-bonding chip 5 to the member 6 (hereinafter referred to as “die attach temperature”) is preferably 80 ° C. or higher, more preferably 100 ° C. or higher, and further preferably 110 ° C. or higher. The die attach temperature is preferably 180 ° C. or lower, more preferably 140 ° C. or lower, and further preferably 130 ° C. or lower.

  The die attach load is preferably 0.05 MPa or more. The die attach load is preferably 0.5 MPa or less, more preferably 0.3 MPa or less.

  The film adhesive 111 is cured by heating the composite member 2. Thereby, the semiconductor chip 41 is fixed to the member 6. Preferably, the film adhesive 111 is heated under a pressurized atmosphere. By curing the film adhesive 111 in a pressurized atmosphere, it is possible to eliminate voids existing between the film adhesive 111 and the member 6, and the film adhesive 111 contacts the member 6. An area can be secured.

Examples of the method of heating in a pressurized atmosphere include a method of heating the composite member 2 disposed in a chamber filled with an inert gas. The pressure of the pressurized atmosphere is preferably 0.5 kg / cm ² (4.9 × 10 ⁻² MPa) or more. The void which exists between the film adhesive 111 and the member 6 as it is 0.5 kg / cm < ² > or more can be easily extinguished. The pressure of the pressurized atmosphere is preferably 20 kg / cm ² (1.96 MPa) or less. The protrusion of the film adhesive 111 due to excessive pressurization can be suppressed as it is 20 kg / cm ² or less.

  The heating temperature is preferably 100 ° C. or higher, more preferably 120 ° C. or higher. The heating temperature is preferably 260 ° C. or lower, more preferably 200 ° C. or lower.

  As shown in FIG. 7, the electrode pads of the semiconductor chip 41 and the terminals of the adherend 606 are electrically connected by bonding wires 407.

  The wire bonding process includes a step of bonding one end of the bonding wire 407 and the electrode pad of the semiconductor chip 41, a step of bonding the other end of the bonding wire 407 and the terminal of the adherend 606, and the like.

  After performing the wire bonding step, the semiconductor chip 41 and the semiconductor chip 641 are sealed with the sealing resin 8. As the sealing resin 8, for example, an epoxy resin is used.

  If necessary, further heating may be performed after sealing (post-curing step). Thereby, the sealing resin 8 which is insufficiently cured in the sealing process can be completely cured. The heating temperature can be set as appropriate.

  A semiconductor device obtained by the above method includes an adherend 606, an adhesive layer 611 disposed on the adherend 606, a semiconductor chip 641 disposed on the adhesive layer 611, and an adhesive disposed on the semiconductor chip 641. A bonding wire 607 having a layer 411, a semiconductor chip 41 disposed on the adhesive layer 411, and a portion embedded in the adhesive layer 411 is included. The semiconductor device further includes a semiconductor chip 41 and a sealing resin 8 that covers the semiconductor chip 641. The sealing resin 8 also covers the bonding wire 607. The adhesive layer 411 is formed by curing the film adhesive 111.

  The semiconductor device can be used for a memory or the like.

  As described above, the method for manufacturing a semiconductor device divides the die after the step of preparing the member 6, the step of pressing the semiconductor wafer 4 to the adhesive film 11, and the step of pressing the semiconductor wafer 4 to the adhesive film 11. The process of forming the chip | tip 5 for die-bonding by this, and the process of crimping | bonding the chip | tip 5 for die-bonding to the member 6 are included.

  It further includes a step of curing the film adhesive 111 by heating the composite member 2 formed by the step of pressure-bonding the die-bonding chip 5 to the member 6. It further includes a step of connecting the semiconductor chip 41 and the adherend 606 with a bonding wire 407. It further includes a step of sealing the semiconductor chip 41 and the semiconductor chip 641 with the sealing resin 8.

(Modification 1)
The contact portion 122A of the pressure-sensitive adhesive layer 122 has a property of being cured by radiation. The peripheral portion 122B of the pressure-sensitive adhesive layer 122 also has a property of being cured by radiation. In the semiconductor device manufacturing method, the die bonding chip 5 is formed, the adhesive layer 122 is irradiated with ultraviolet rays, and the die bonding chip 5 is picked up. Thereby, since the adhesive force with respect to the die-bonding chip | tip 5 of the adhesive layer 122 falls, the chip | tip 5 for die-bonding can be picked up easily.

(Modification 2)
The contact portion 122A of the pressure-sensitive adhesive layer 122 is cured by radiation. The peripheral portion 122B of the adhesive layer 122 is also cured by radiation.

(Modification 3)
The adhesive film 11 has a multilayer shape including a first layer and a second layer disposed on the first layer.

(Modification 4)
As shown in FIG. 8, the entire adhesive surface of the dicing tape 12 is in contact with the adhesive film 11. The pressure-sensitive adhesive layer 122 preferably has a property of being cured by radiation. In the semiconductor device manufacturing method, the die bonding chip 5 is formed, the adhesive layer 122 is irradiated with ultraviolet rays, and the die bonding chip 5 is picked up. Thereby, since the adhesive force with respect to the die-bonding chip | tip 5 of the adhesive layer 122 falls, the chip | tip 5 for die-bonding can be picked up easily.

(Modification 5)
The step of forming the die bonding chip 5 includes a step of forming a fragile layer inside the semiconductor wafer 4 by irradiating the semiconductor wafer 4 disposed on the dicing tape integrated adhesive film 71 with a laser beam. The step of forming the die-bonding chip 5 further includes a step of expanding after the step of forming the fragile layer. The adhesive film 11 and the semiconductor wafer 4 are divided simultaneously by expanding.

(Modification 6)
As shown in FIG. 9, the composite 20 is formed by press-bonding the die bonding chip 5 to the adherend 606 of the member 6. The composite 20 includes an adherend 606, a film adhesive 111 disposed on the adherend 606, and a semiconductor chip 41 disposed on the film adhesive 111. The composite 20 includes a semiconductor chip 641 and a bonding wire 607 embedded in the film adhesive 111. The bonding wire 607 connects the semiconductor chip 641 and the adherend 606. One end of the bonding wire 607 is in contact with the electrode pad of the semiconductor chip 41. The other end of the bonding wire 607 is in contact with the terminal of the adherend 606. The bonding wire 607 includes both ends embedded in the film adhesive 111. An adhesive layer 611 is located between the adherend 606 and the semiconductor chip 641. The semiconductor chip 641 is preferably a controller chip. As shown in FIG. 10, the stacking chip 1005 is pressure-bonded to the semiconductor chip 41. The stacking chip 1005 includes a semiconductor chip 1041 and a film adhesive 1111 disposed on the semiconductor chip 1041. The semiconductor chip 1041 and the semiconductor chip 41 are connected by a bonding wire 1407. The semiconductor chip 41 and the semiconductor chip 1041 are sealed with a sealing resin.

(Other variations)
Modifications 1 to 6 can be arbitrarily combined.

[Embodiment 2]
(Multilayer film 9)
As shown in FIG. 11, the multilayer film 9 includes a separator 14, an adhesive film 11 disposed on the separator 14, and a separator 15 disposed on the adhesive film 11. Both sides of the adhesive film 11 can be defined by a first surface in contact with the separator 14 and a second surface facing the first surface. The second surface is in contact with the separator 15.

  Examples of the separator 14 include a polyethylene terephthalate (PET) film. The separator 14 is preferably subjected to a mold release process. The thickness of the separator 14 can be set as appropriate.

  Examples of the separator 15 include a polyethylene terephthalate (PET) film. The separator 15 is preferably subjected to a mold release process. The thickness of the separator 15 can be set as appropriate.

(Method for manufacturing semiconductor device)
The manufacturing method of the semiconductor device is for die bonding by performing die separation after the step of preparing the member 6, the step of pressing the semiconductor wafer 4 to the adhesive film 11, and the step of pressing the semiconductor wafer 4 to the adhesive film 11. A step of forming the chip 5 and a step of pressure-bonding the die-bonding chip 5 to the member 6.

  The method for manufacturing a semiconductor device further includes a step including a step of peeling the separator 14 and a step of bonding the adhesive film 11 and the dicing tape 12 after the step of peeling the separator 14. The step of pressure-bonding the semiconductor wafer 4 to the adhesive film 11 includes a step of peeling the separator 15 and a step of pressure-bonding the semiconductor wafer 4 to the adhesive film 11 after the step of peeling the separator 15.

  It further includes a step of curing the film adhesive 111 by heating the composite member 2 formed by the step of pressure-bonding the die-bonding chip 5 to the member 6. It further includes a step of connecting the semiconductor chip 41 and the adherend 606 with a bonding wire 407. It further includes a step of sealing the semiconductor chip 41 and the semiconductor chip 641 with the sealing resin 8.

(Modification)
The adhesive film 11 has a multilayer shape including a first layer and a second layer disposed on the first layer. In the second embodiment, the fifth and sixth modifications of the first embodiment can also be adopted.

  EXAMPLES Hereinafter, although this invention is demonstrated in detail using an Example, this invention is not limited to a following example, unless the summary is exceeded.

The components used in the examples will be described.
Acrylic resin: Tethan Resin SG-708-6 manufactured by Nagase ChemteX Corporation (acrylic ester copolymer having hydroxyl group and carboxy group, Mw: 700,000, glass transition temperature: 4 ° C.)
Epoxy resin 1: KI-3000 (solid epoxy resin having an epoxy equivalent of 195 to 205 g / eq.) Manufactured by Tohto Kasei Co., Ltd.
Epoxy resin 2: jER YL980 (liquid epoxy resin having an epoxy equivalent of 180 to 190 g / eq.) Manufactured by Mitsubishi Chemical Corporation
Phenol resin: MEH-7851SS: MEH-7851SS manufactured by Meiwa Kasei Co., Ltd. (solid phenol resin having a hydroxyl group equivalent of 203 g / eq.)
Silica filler: SE-2050MC manufactured by Admatechs (silica filler having an average particle size of 0.5 μm)
PMMA particles: Art Pearl J-4PY manufactured by Negami Kogyo Co., Ltd. (spherical PMMA particles having an average particle size of 2.2 μm, a maximum particle size of 5 μm, a monodisperse grade, and a specific gravity of 1.2)
Catalyst: TPP-MK (tetraphenylphosphonium tetra-p-tolylborate) manufactured by Hokuko Chemical Co., Ltd.

[Preparation of adhesive film]
According to the blending ratio shown in Table 1, each component and methyl ethyl ketone (MEK) were blended and stirred to obtain a varnish. Varnish was applied on a separator (PET film subjected to silicone release treatment) and dried in an oven at 130 ° C. for 2 minutes to obtain an adhesive film having a thickness of 60 μm.

[Evaluation]
The following evaluation was performed about the obtained adhesive film. The results are shown in Table 1.

(Storage elastic modulus G ′, loss elastic modulus G ″ and tan δ)
By laminating a plurality of adhesive films, a laminate having a thickness of about 1000 μm was obtained. By punching out the laminate, a disk-shaped test piece having a diameter of 8 mm was obtained. Using MARS III manufactured by HAAKE, the storage modulus G ′ of the test piece, loss elasticity under the conditions of a frequency of 0.1 Hz to 10 Hz, a measurement temperature of 120 ° C., a measurement gap of 700 μm, a strain of 0.10%, and a jig diameter of 8 mm. The rate G ″ and tan δ were measured.

(viscosity)
A sheet having a thickness of about 120 μm was obtained by laminating a plurality of adhesive films. A test piece of 20 mm square was cut out from the sheet. The viscosity of the test piece was measured under the conditions of a measurement speed of 5 (1 / s), a measurement temperature of 120 ° C., a measurement time of 5 min, a measurement gap of 100 μm, and a jig diameter of 15 mm using HARS III made by HAAKE.

(Embeddability)
The same die bonding film as the adhesive film of Example 1 was produced except that the thickness was 25 μm. A first chip having a length of 6 mm and a width of 6 mm was attached to the die bonding film. A die bonding film with a first chip was obtained by cutting the die bonding film along the first chip. A BGA substrate with a first chip was obtained by pressure-bonding a die bonding film with a first chip to a BGA substrate. Then, thermosetting was performed at 150 ° C. for 1 hour under 0.5 kg / cm ² . Forty-three 23 μm wires were struck on the BGA substrate with the first chip. The distance between the wires was 100 μm, and the height from the top surface of the first chip to the top of the wire was 50 μm at maximum. A second chip having a length of 6 mm and a width of 6 mm was attached to the adhesive film. The adhesive film with the second chip was obtained by cutting the adhesive film along the second chip. The adhesive film with the second chip was pressure-bonded to the first chip of the BGA substrate with the first chip at a die attach temperature of 120 ° C., a die attach time of 1 sec, and a die attach load of 0.1 MPa. Then, thermosetting was performed at 150 ° C. for 1 hour under 0.5 kg / cm ² . A scanning electron microscope (SEM) was used to observe whether voids were present under the wire. When there was no void under the wire, it was determined as “◯”. When a void was present under the wire, it was determined as “x”.

(Overhang)
A 6 mm long × 6 mm wide chip was attached to the adhesive film. The adhesive film with a chip | tip was obtained by cut | disconnecting an adhesive film along a chip | tip. A BGA substrate with a chip was obtained by pressure-bonding the adhesive film with a chip to the BGA substrate at a die attach temperature of 120 ° C., a die attach time of 1 sec, and a die attach load of 0.1 MPa. The BGA substrate with a chip was observed from above using a microscope. When the adhesive film protruded beyond 100 μm from the end of the chip, it was determined as “x”. When the adhesive film protruded 100 μm or less from the end of the chip, it was determined as “◯”.

DESCRIPTION OF SYMBOLS 1 Multi-layer film 11 Adhesive film 12 Dicing tape 13 Separator 71 Dicing tape integrated adhesive film 121 Base material 122 Adhesive layer 122A Contact part 122B Peripheral part

4 Semiconductor Wafer 5 Die Bond Chip 41 Semiconductor Chip 111 Film Adhesive 6 Member 606 Substrate 611 Adhesive Layer 641 Semiconductor Chip 607 Bonding Wire 2 Composite Member 407 Bonding Wire 411 Adhesive Layer 8 Sealing Resin

20 Composite 1005 Laminating Chip 1041 Semiconductor Chip 1111 Film Adhesive 1407 Bonding Wire

9 Multi-layer film 14 Separator 15 Separator

Claims (8)

  An adhesive film having a tan δ (loss elastic modulus G ″ / storage elastic modulus G ′) of 0.7 to 2.0 at 120 ° C. and a frequency of 0.1 Hz.   2. The adhesive film according to claim 1, wherein a storage elastic modulus G ′ at 120 ° C. and a frequency of 0.1 Hz is 10,000 Pa or less, and a loss elastic modulus G ″ at 120 ° C. and a frequency of 0.1 Hz is 5000 Pa or less.   The adhesive film according to claim 1, wherein the viscosity at 120 ° C. is 2000 Pa · s or less. Preparing a member including an adherend, a first semiconductor chip, and a bonding wire connecting the first semiconductor chip and the adherend;
Crimping the semiconductor wafer to the adhesive film;
After the step of pressure-bonding the semiconductor wafer to the adhesive film, forming a die-bonding chip including a second semiconductor chip and a film-like adhesive disposed on the second semiconductor chip by dividing the die;
The adhesive film in any one of Claims 1-3 for using for the manufacturing method of a semiconductor device including the process of crimping | bonding the said chip | tip for die-bonding to the said member. A dicing tape including a base material and an adhesive layer disposed on the base material;
A dicing tape-integrated adhesive film comprising the adhesive film according to claim 1 disposed on the pressure-sensitive adhesive layer. A separator;
The multilayer film containing the dicing tape integrated adhesive film of Claim 5 arrange | positioned on the said separator. Preparing a member including an adherend, a first semiconductor chip, and a bonding wire connecting the first semiconductor chip and the adherend;
A step of crimping a semiconductor wafer to the adhesive film according to claim 1;
After the step of pressure-bonding the semiconductor wafer to the adhesive film, forming a die-bonding chip including a second semiconductor chip and a film-like adhesive disposed on the second semiconductor chip by dividing the die;
A method of manufacturing a semiconductor device, including a step of pressure-bonding the die bonding chip to the member. A semiconductor device obtained by the manufacturing method according to claim 7.

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