WO2021048986A1 - 半導体装置の製造方法、接着剤層の選定方法、並びに、ダイシング・ダイボンディング一体型フィルム及びその製造方法 - Google Patents
半導体装置の製造方法、接着剤層の選定方法、並びに、ダイシング・ダイボンディング一体型フィルム及びその製造方法 Download PDFInfo
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- adhesive layer
- dicing
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- the present disclosure relates to a method for manufacturing a semiconductor device, a method for selecting an adhesive layer, a dicing / die bonding integrated film provided with an adhesive layer, and a method for manufacturing the same.
- Patent Document 1 discloses an adhesive sheet (dicing die bonding sheet) having both a function of fixing a semiconductor wafer in a dicing process and a function of adhering a semiconductor chip to a substrate in a dicing process. In the dicing step, the semiconductor wafer and the adhesive layer are separated into individual pieces to obtain a chip with an adhesive piece.
- Patent Document 2 discloses a conductive film-like adhesive and a dicing tape with a film-like adhesive whose heat dissipation after curing is higher than that before curing.
- the present inventors put metal particles of 75% by mass or more on the adhesive layer of the dicing / die bonding integrated film based on the total mass of the adhesive layer. After blending, it was found that the adhesion between the adhesive layer and the adhesive layer tends to be insufficient. If the adhesion between the two is insufficient, there will be a problem that the chip with the adhesive piece is separated from the adhesive layer in the dicing step.
- the present disclosure is excellent because it can sufficiently suppress the detachment of the adhesive pieced chip from the adhesive layer in the dicing step of forming a plurality of adhesive pieced chips on the adhesive layer by individualizing the wafer and the adhesive layer.
- a method capable of efficiently manufacturing a semiconductor device having a heat dissipation property is provided.
- the present disclosure also provides a method for selecting an adhesive layer useful for efficiently manufacturing the semiconductor device, a dicing / die bonding integrated film provided with the adhesive layer, and a method for manufacturing the same.
- One aspect of the present disclosure relates to a method for manufacturing a semiconductor device.
- This manufacturing method includes the following steps, and the adhesive layer of the dicing / die bonding integrated film contains 75% by mass or more of metal particles based on the total mass of the adhesive layer.
- Step of attaching a wafer to the adhesive layer of the integrated film Step of obtaining a plurality of adhesive pieced chips by separating the wafer and the adhesive layer
- Adhesive pieced chip Step of picking up from the adhesive layer Step of mounting the chip with adhesive piece on the substrate or other chips
- the adhesion between the adhesive layer and the adhesive layer is enhanced by carrying out the step (B) (active energy ray irradiation step) before the step (D) (dicing step).
- step (B) active energy ray irradiation step
- step (C) may be carried out after the step (B), or the step (B) may be carried out after the step (C).
- the T-shaped peeling strength B of the pressure-sensitive adhesive layer and the adhesive layer after irradiation with the active energy ray may be larger than the T-shaped peeling strength A of both before irradiation with the active energy ray.
- the lower limit of the T-shaped peeling strength B after irradiation with the active energy ray is, for example, 0.07 N / 25 mm from the viewpoint of sufficient adhesion between the two in the dicing step.
- the upper limit of the T-shaped peel strength B is, for example, 0.5 N / 25 mm from the viewpoint of excellent pick-up property.
- the T-shaped peeling strength referred to here means a value calculated by the method described in the examples.
- the active energy rays may modify at least one of the surface of the metal particles contained in the adhesive layer and the pressure-sensitive adhesive layer in contact with the surface of the metal particles and the pressure-sensitive adhesive layer.
- the present inventors speculate that this is the main cause of the increase in the adhesiveness of the particles.
- the present inventors have confirmed by SEM (scanning electron microscope) that the metal particles originally contained in the adhesive layer are attached to the surface of the adhesive layer separated from the adhesive layer.
- the pressure-sensitive adhesive layer contains a resin having a carbon-carbon double bond that is reactive to irradiation with active energy rays.
- the pressure-sensitive adhesive layer is easily modified by irradiation with active energy rays to increase the adhesion to the metal particles.
- One aspect of the present disclosure is a method of selecting an adhesive layer that constitutes a dicing / die bonding integrated film together with a base material layer and an adhesive layer.
- This selection method includes the following steps, and selects an adhesive layer in which the T-type peeling strength B after irradiation with the active energy ray is larger than the T-shaped peeling strength A before irradiation with the active energy ray.
- a process of obtaining an adhesive layer containing the above metal particles for dying and die bonding ⁇ A process of irradiating an active energy ray toward the integrated film ⁇
- a pressure-sensitive adhesive layer before irradiation of the active energy ray And the step of measuring the T-shaped peeling strength A of the adhesive layer and the step of measuring the T-shaped peeling strength B of the adhesive layer and the adhesive layer after irradiation with active energy rays.
- One aspect of the present disclosure relates to a method for producing a dicing / die bonding integrated film including a base material layer, an adhesive layer, and an adhesive layer in this order.
- This manufacturing method includes the following steps. -A step of preparing a dicing film including a base material layer and an adhesive layer provided on one surface of the base material layer-75% by mass based on the total mass of the adhesive layer on the surface of the pressure-sensitive adhesive layer. Step to obtain dicing / die bonding integrated film by forming an adhesive layer containing the above metal particles ⁇ Adhesive to the adhesive layer by irradiating the dicing / die bonding integrated film with active energy rays Step to increase the T-shaped peeling strength of the agent layer
- a dicing / die bonding integrated film useful for efficiently manufacturing a semiconductor device having excellent heat dissipation can be manufactured.
- the adhesive layer selected by the above-mentioned selection method according to the present disclosure may be used as the adhesive layer.
- One aspect of this disclosure relates to a dicing / die bonding integrated film.
- This integrated film is provided so as to cover a base material layer, an adhesive layer having a first surface facing the base material layer and a second surface on the opposite side thereof, and a central portion of the second surface.
- the interface between the adhesive layer and the adhesive layer is a region corresponding to the bonding position of the wafer in the adhesive layer and has a region irradiated with energy rays, and the adhesive layer in the region is provided with the adhesive layer.
- the T-shaped peeling strength of the adhesive layer is 0.07 N / 25 mm or more.
- the adhesive layer and the adhesive layer have sufficient adhesion by irradiation with active energy rays. Therefore, in the dicing step, it is possible to sufficiently prevent the chip with the adhesive piece from coming off from the adhesive layer. Further, since the dicing / die bonding integrated film is already irradiated with the active energy rays, the step of irradiating the active energy rays in the manufacturing process of the semiconductor device can be omitted.
- the T-shaped peeling strength of the adhesive layer and the adhesive layer is, for example, 0.5 N / 25 mm or less from the viewpoint of excellent pick-up property.
- the adhesive layer may contain a thermosetting resin component, and the thermal conductivity of the adhesive layer after heat curing is, for example, 1.5 to 20 W / m ⁇ K.
- the thermal conductivity of the adhesive layer after thermosetting can be adjusted by adjusting the amount and type of metal particles to be blended in the adhesive layer.
- a method capable of efficiently manufacturing a semiconductor device having excellent heat dissipation is provided. Further, according to the present disclosure, a method for selecting an adhesive layer useful for efficiently manufacturing the semiconductor device, a dicing / die bonding integrated film provided with the adhesive layer, and a method for manufacturing the same are provided. To.
- FIG. 1A is a plan view showing an embodiment of a dicing / diebonding integrated film
- FIG. 1B is a schematic cross-sectional view taken along line BB shown in FIG. 1A
- FIG. 2 is a schematic view showing a state in which a dicing ring is attached to the peripheral edge of the adhesive layer of the dicing / die bonding integrated film and a wafer is attached to the surface of the adhesive layer.
- FIG. 3 is a cross-sectional view schematically showing an example of a semiconductor device. 4 (a) to 4 (d) are cross-sectional views schematically showing a process of manufacturing a chip with an adhesive piece.
- FIG. 5 is a cross-sectional view schematically showing a process of manufacturing the semiconductor device shown in FIG.
- FIG. 6 is a cross-sectional view schematically showing a process of manufacturing the semiconductor device shown in FIG.
- FIG. 7 is a cross-sectional view schematically showing a process of manufacturing the semiconductor device shown in FIG.
- the numerical range indicated by using "-" in the present specification indicates a range including the numerical values before and after "-" as the minimum value and the maximum value, respectively.
- the upper limit value or the lower limit value described in one numerical range may be replaced with the upper limit value or the lower limit value of another numerical range described stepwise.
- the upper limit value or the lower limit value of the numerical range may be replaced with the value shown in the examples.
- (meth) acrylate means acrylate or the corresponding methacrylate.
- FIG. 1A is a plan view showing a dicing / diebonding integrated film according to the present embodiment
- FIG. 1B is a schematic cross-sectional view taken along the line BB of FIG. 1A. is there.
- the dicing ring DR is attached to the peripheral edge of the adhesive layer 2 of the dicing / die bonding integrated film 10 (hereinafter, simply referred to as “film 10” in some cases), and the dicing ring DR is attached to the surface of the adhesive layer 5.
- film 10 the dicing ring DR is attached to the surface of the adhesive layer 5.
- It is a schematic diagram which shows the state in which the wafer W is attached.
- the film 10 is applied to a manufacturing process of a semiconductor device including a dicing step of individualizing a wafer W into a plurality of chips and a subsequent pick-up step (see FIGS. 4 (c) and 4 (d)). ..
- a manufacturing process of a semiconductor device including a dicing step of individualizing a wafer W into a plurality of chips and a subsequent pick-up step (see FIGS. 4 (c) and 4 (d)). ..
- an embodiment in which one laminate of the pressure-sensitive adhesive layer 2 and the adhesive layer 5 is formed on the square base material layer 1 is illustrated, but the base material layer 1 has a predetermined length.
- the laminated body of the pressure-sensitive adhesive layer 2 and the adhesive layer 5 may be arranged at predetermined intervals so as to have a length (for example, 100 m or more) and line up in the longitudinal direction thereof.
- the film 10 may further include a cover film (not shown) that covers the adhesive layer 5.
- the film 10 has a base material layer 1, a pressure-sensitive adhesive layer 2 having a first surface 2a facing the base material layer 1 and a second surface 2b on the opposite side thereof, and a second surface 2b of the pressure-sensitive adhesive layer 2.
- An adhesive layer 5 provided so as to cover the central portion of the above is provided in this order.
- the T-shaped peeling intensity at the interface between the two layers after irradiation with active energy rays is 0.07 N / 25 mm or more, 0.1 to 0.5 N / 25 mm, 0.15 to 0.4 N / 25 mm, or 0.2. It may be ⁇ 0.4N / 25mm.
- each layer constituting the film 10 will be described.
- the adhesive layer 5 contains (a) metal particles, and may further contain (b) a thermosetting resin, (c) a curing agent, and (d) an elastomer, if necessary.
- the adhesive layer 5 is thermosetting and can be in a semi-cured (B stage) state and then in a completely cured product (C stage) state after the curing treatment.
- the thermal conductivity of the adhesive layer 5 after curing is, for example, 1.5 to 20 W / m ⁇ K.
- the thermal conductivity of the adhesive layer 5 after curing is 1.6 W / m ⁇ K or more, 1.7 W / m ⁇ K or more, 2.0 W / m ⁇ K or more, or 2.3 W / m ⁇ K or more. It may be there.
- the thermal conductivity referred to here means a value calculated by the method described in the examples.
- Component (a) Metal particles
- the component (a) is a component used to enhance the thermal conductivity of the adhesive layer 5 and enhance the heat dissipation of the semiconductor device.
- the component (a) include nickel particles, copper particles, silver particles, and aluminum particles.
- particles obtained by coating the surface of base particles (for example, metal particles or resin particles) with metal may be used. These may be used individually by 1 type or in combination of 2 or more type.
- the component (a) may be silver particles or metal particles (for example, copper particles or the like) whose surface is coated with silver because it is difficult to be oxidized.
- the shape of the component (a) is not particularly limited, and is, for example, flaky or spherical.
- the average particle size of the component (a) may be 0.01 to 10 ⁇ m.
- the average particle size of the component (a) is 0.01 ⁇ m or more, it is possible to prevent an increase in viscosity when the adhesive varnish is produced, and a desired amount of the component (a) can be contained in the adhesive layer 5.
- the adhesive layer 5 can secure the wettability to the adherend and exhibit better adhesiveness.
- the average particle size of the component (a) is 10 ⁇ m or less, the film formability is more excellent, and the conductivity due to the addition of metal particles tends to be further improved.
- the average particle size of the component (a) may be 0.1 ⁇ m or more, 0.5 ⁇ m or more, 1.0 ⁇ m or more, or 1.5 ⁇ m or more, and may be 8.0 ⁇ m or less, 7.0 ⁇ m or less, 6.0 ⁇ m or less. , 5.0 ⁇ m or less, 4.0 ⁇ m or less, or 3.0 ⁇ m or less.
- the average particle size of the component (a) means the particle size (D 50 ) when the ratio (volume fraction) to the volume of the entire component (a) is 50%.
- the average particle size (D 50 ) of the component (a) is determined by a laser scattering method of a suspension in which the component (a) is suspended in water using a laser scattering type particle size measuring device (for example, Microtrac). It can be obtained by measuring.
- the content of the component (a) is 75% by mass or more based on the total amount of the adhesive layer 5.
- the content of the component (a) may be 77% by mass or more, 80% by mass or more, 83% by mass or more, or 85% by mass or more based on the total amount of the adhesive layer 5.
- the upper limit of the content of the component (a) is not particularly limited, but may be 95% by mass or less, 92% by mass or less, or 90% by mass or less based on the total amount of the adhesive layer 5.
- Component (b) Thermosetting resin
- the component (b) is a component having a property of forming a three-dimensional bond between molecules and being cured by heating or the like, and is a component exhibiting an adhesive action after curing.
- the component (b) may be an epoxy resin.
- the component (b) may contain an epoxy resin that is liquid at 25 ° C.
- the epoxy resin can be used without particular limitation as long as it has an epoxy group in the molecule.
- the epoxy resin may have two or more epoxy groups in the molecule.
- the epoxy resin examples include bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol S type epoxy resin, phenol novolac type epoxy resin, cresol novolac type epoxy resin, bisphenol A novolac type epoxy resin, and bisphenol F novolac type epoxy resin.
- Stilben type epoxy resin triazine skeleton containing epoxy resin, fluorene skeleton containing epoxy resin, triphenol methane type epoxy resin, biphenyl type epoxy resin, xylylene type epoxy resin, biphenyl aralkyl type epoxy resin, naphthalene type epoxy resin, dicyclopentadiene type
- examples thereof include epoxy resins, polyfunctional phenols, and polycyclic aromatic diglycidyl ether compounds such as anthracene. These may be used individually by 1 type or in combination of 2 or more type.
- the epoxy resin may be a bisphenol type epoxy resin or a cresol novolac type epoxy resin from the viewpoint of heat resistance of the cured product and the like.
- the epoxy resin may be an epoxy resin that is liquid at 25 ° C.
- an epoxy resin that is liquid at 25 ° C.
- a die bonding film having a predetermined surface roughness tends to be easily obtained.
- the physical smoothing process it tends to be possible to perform the physical smoothing process under milder conditions.
- commercially available epoxy resins liquid at 25 ° C. include EXA-830CRP (trade name, manufactured by DIC Corporation) and YDF-8170C (trade name, manufactured by Nippon Steel Chemical & Materials Co., Ltd.).
- the epoxy equivalent of the epoxy resin is not particularly limited, but may be 90 to 300 g / eq, 110 to 290 g / eq, or 110 to 290 g / eq.
- the epoxy equivalent of the component (A) is in such a range, it tends to be easy to secure the fluidity of the adhesive composition when forming the adhesive layer 5 while maintaining the bulk strength of the adhesive layer 5. is there.
- the content of the component (b) may be 0.1% by mass or more, 1% by mass or more, 2% by mass or more, or 3% by mass or more, and is 15% by mass or less, based on the total amount of the adhesive layer 5. , 12% by mass or less, 10% by mass or less, or 8% by mass or less.
- the mass ratio of the epoxy resin to the component (b) is 10 to 100 as a percentage. %, 40-100%, 60% -100%, or 80% -100%.
- the content of the epoxy resin is 1% by mass or more, 2% by mass or more, 3% by mass or more, or based on the total amount of the adhesive layer 5. It may be 4% by mass or more.
- the content of the epoxy resin may be 15% by mass or less, 12% by mass or less, 10% by mass or less, or 8% by mass or less.
- the component (c) may be a phenol resin that can serve as a curing agent for the epoxy resin.
- the phenol resin can be used without particular limitation as long as it has a phenolic hydroxyl group in the molecule.
- examples of the phenol resin include phenols such as phenol, cresol, resorcin, catechol, bisphenol A, bisphenol F, phenylphenol and aminophenol, and / or naphthols such as ⁇ -naphthol, ⁇ -naphthol and dihydroxynaphthalene, and formaldehyde and the like.
- Phenols such as novolak-type phenol resin, allylated bisphenol A, allylated bisphenol F, allylated naphthalenediol, phenol novolac, and phenol obtained by condensing or co-condensing with a compound having an aldehyde group of
- phenol aralkyl resin synthesized from naphthols and dimethoxyparaxylene or bis (methoxymethyl) biphenyl, naphthol aralkyl resin, biphenyl aralkyl type phenol resin, phenyl aralkyl type phenol resin and the like can be mentioned. These may be used individually by 1 type or in combination of 2 or more type.
- the hydroxyl group equivalent of the phenol resin may be 40 to 300 g / eq, 70 to 290 g / eq, or 100 to 280 g / eq.
- the hydroxyl group equivalent of the phenol resin is 40 g / eq or more, the storage elastic modulus of the film tends to be further improved, and when it is 300 g / eq or less, it is possible to prevent problems due to the generation of foaming, outgas, etc. ..
- Ratio of the epoxy equivalent of the epoxy resin as the component (b) to the hydroxyl equivalent of the phenol resin as the component (b) / the epoxy equivalent of the epoxy resin as the component / the hydroxyl equivalent of the phenol resin as the component (c) ) Indicates 0.30 / 0.70 to 0.70 / 0.30, 0.35 / 0.65 to 0.65 / 0.35, 0.40 / 0.60 to 0 from the viewpoint of curability. It may be .60 / 0.40, or 0.45 / 0.55 to 0.55 / 0.45.
- the equivalent amount ratio is 0.30 / 0.70 or more, more sufficient curability tends to be obtained.
- the equivalent equivalent ratio is 0.70 / 0.30 or less, it is possible to prevent the viscosity from becoming too high, and it is possible to obtain more sufficient fluidity.
- the content of the component (c) may be 0.1% by mass or more, 1% by mass or more, 2% by mass or more, or 3% by mass or more, and is 15% by mass or less, based on the total amount of the adhesive layer 5. , 12% by mass or less, 10% by mass or less, or 8% by mass or less.
- the component (d) is, for example, a polyimide resin, an acrylic resin, a urethane resin, a polyphenylene ether resin, a polyetherimide resin, a phenoxy resin, a modified polyphenylene ether resin, or the like, and has a crosslinkable functional group.
- the acrylic resin means a polymer containing a structural unit derived from a (meth) acrylic acid ester.
- the acrylic resin may be a polymer containing a structural unit derived from a (meth) acrylic acid ester having a crosslinkable functional group such as an epoxy group, an alcoholic or phenolic hydroxyl group, or a carboxy group as a structural unit.
- the acrylic resin may be an acrylic rubber such as a copolymer of (meth) acrylic acid ester and acrylonitrile. These may be used individually by 1 type or in combination of 2 or more type.
- acrylic resins examples include SG-70L, SG-708-6, WS-023 EK30, SG-280 EK23, HTR-860P-3, HTR-860P-3CSP, HTR-860P-3CSP-3DB ( (Made by Nagase ChemteX Corporation) and the like.
- the glass transition temperature (Tg) of the component (d) may be ⁇ 50 to 50 ° C. or ⁇ 30 to 20 ° C.
- Tg of the acrylic resin When the Tg of the acrylic resin is ⁇ 50 ° C. or higher, the tackiness of the adhesive layer 5 is lowered, so that the handleability tends to be further improved.
- Tg of the acrylic resin When the Tg of the acrylic resin is 50 ° C. or lower, the fluidity of the adhesive composition when forming the adhesive layer 5 tends to be more sufficiently secured.
- the glass transition temperature (Tg) of the component (d) means a value measured using a DSC (thermal differential scanning calorimeter) (for example, manufactured by Rigaku Co., Ltd., trade name: Thermo Plus 2).
- the weight average molecular weight (Mw) of the component (d) may be 50,000 to 1.2 million, 100,000 to 1.2 million, or 300,000 to 900,000. When the weight average molecular weight of the component (d) is 50,000 or more, the film forming property tends to be superior. When the weight average molecular weight of the component (d) is 1.2 million or less, the fluidity of the adhesive composition when forming the adhesive layer 5 tends to be more excellent.
- the weight average molecular weight (Mw) is a value measured by gel permeation chromatography (GPC) and converted using a calibration curve using standard polystyrene.
- the measuring device for the weight average molecular weight (Mw) of the component, the measuring conditions, and the like are as follows.
- the content of the component (d) may be 0.1% by mass or more, 0.5% by mass or more, 1% by mass or more, or 2% by mass or more based on the total amount of the adhesive layer 5, and is 10% by mass. % Or less, 8% by mass or less, 6% by mass or less, or 5% by mass or less.
- the adhesive layer 5 may further contain (e) a curing accelerator.
- a curing accelerator When the adhesive layer 5 contains the component (e), the adhesiveness and the connection reliability tend to be more compatible.
- the component (e) include imidazoles and derivatives thereof, organophosphorus compounds, secondary amines, tertiary amines, quaternary ammonium salts and the like. These may be used individually by 1 type or in combination of 2 or more type. Among these, the component (e) may be imidazoles and derivatives thereof from the viewpoint of reactivity.
- imidazoles examples include 2-methylimidazole, 1-benzyl-2-methylimidazole, 1-cyanoethyl-2-phenylimidazole, 1-cyanoethyl-2-methylimidazole and the like. These may be used individually by 1 type or in combination of 2 or more type.
- the content of the component (e) may be 0.001 to 1% by mass based on the total amount of the adhesive layer 5. When the content of the component (e) is in such a range, the adhesiveness and the connection reliability tend to be more compatible.
- the adhesive layer 5 may further contain a coupling agent, an antioxidant, a rheology control agent, a leveling agent, and the like as other components other than the components (a) to (e).
- a coupling agent include ⁇ -ureidopropyltriethoxysilane, ⁇ -mercaptopropyltrimethoxysilane, 3-phenylaminopropyltrimethoxysilane, 3- (2-aminoethyl) aminopropyltrimethoxysilane, and the like. ..
- the content of other components may be 0.01 to 3% by mass based on the total amount of the adhesive layer 5.
- the adhesive layer 5 can be produced by forming an adhesive composition containing the above-mentioned component (a),, if necessary, the components (b) to (e) and other components in the form of a film. it can.
- Such an adhesive layer 5 can be formed by applying an adhesive composition to a support film (not shown).
- the adhesive composition can be used as a solvent-diluted adhesive varnish.
- the adhesive layer 5 can be formed by applying the adhesive varnish to the support film and removing the solvent by heating and drying.
- the solvent is not particularly limited as long as it can dissolve components other than the component (a).
- the solvent include aromatic hydrocarbons such as toluene, xylene, mesityrene, cumene and p-simene; aliphatic hydrocarbons such as hexane and heptane; cyclic alkanes such as methylcyclohexane; tetrahydrofuran, 1,4-dioxane and the like.
- Cyclic ethers such as acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, 4-hydroxy-4-methyl-2-pentanone; esters such as methyl acetate, ethyl acetate, butyl acetate, methyl lactate, ethyl lactate, ⁇ -butyrolactone; Carbonated esters such as ethylene carbonate and propylene carbonate; amides such as N, N-dimethylformamide, N, N-dimethylacetamide and N-methyl-2-pyrrolidone can be mentioned. These may be used individually by 1 type or in combination of 2 or more type.
- the solvent may be toluene, xylene, methyl ethyl ketone, methyl isobutyl ketone, or cyclohexanone from the viewpoint of solubility and boiling point.
- the concentration of the solid component in the adhesive varnish may be 10 to 80% by mass based on the total mass of the adhesive varnish.
- the adhesive varnish can be prepared by mixing and kneading the components (a) to (e), other components, and a solvent.
- the order of mixing and kneading each component is not particularly limited and can be set as appropriate.
- Mixing and kneading can be carried out by appropriately combining a disperser such as a normal stirrer, a raft machine, a triple roll, a ball mill, and a bead mill.
- air bubbles in the varnish may be removed by vacuum degassing or the like.
- the support film to which the varnish is coated is not particularly limited, and examples thereof include films such as polytetrafluoroethylene, polyethylene, polypropylene, polymethylpentene, polyethylene terephthalate, and polyimide.
- the thickness of the support film may be, for example, 10 to 200 ⁇ m or 20 to 170 ⁇ m.
- a known method can be used, and examples thereof include a knife coating method, a roll coating method, a spray coating method, a gravure coating method, a bar coating method, and a curtain coating method. Be done.
- the conditions for heat drying are not particularly limited as long as the solvent used is sufficiently volatilized, but may be, for example, 0.1 to 90 minutes at 50 to 200 ° C.
- the thickness of the adhesive layer 5 can be appropriately adjusted according to the application, but may be, for example, 3 to 200 ⁇ m. When the thickness of the adhesive layer 5 is 3 ⁇ m or more, the adhesive force tends to be sufficient, and when the thickness is 200 ⁇ m or less, the heat dissipation tends to be sufficient.
- the thickness of the adhesive layer 5 may be 10 to 100 ⁇ m or 120 to 75 ⁇ m from the viewpoint of adhesive strength and thinning of the semiconductor device.
- the surface roughness of the first surface 5a is, for example, 1.0 ⁇ m or less
- the surface roughness of the second surface 5b is, for example, 1.0 ⁇ m or less.
- the surface of the pressure-sensitive adhesive layer 2 in contact with the second surface 5b will be referred to as the first surface 5a
- the surface on the side to which the wafer W is bonded will be referred to as the second surface 5b.
- the surface roughness referred to here means the arithmetic mean roughness Ra
- the "arithmetic mean roughness Ra" means the value calculated by the method described in the examples.
- the measurement magnification may be 50 to 100 times.
- the surface 5b When the second surface 5b is formed by a manufacturing method in which an adhesive varnish is applied to a support film and the solvent is removed by heating and drying, the surface is usually rough regardless of the components contained in the adhesive varnish. The roughness tends to be 1.0 ⁇ m or less.
- the first surface 5a when the first surface 5a is formed by a manufacturing method in which an adhesive varnish is applied to a support film and the solvent is removed by heating and drying, the first surface 5a usually tends to be affected by the components contained in the adhesive varnish. ..
- the surface roughness of the surface of the first surface 5a is adjusted to 1.0 ⁇ m or less by using, for example, particles having an average particle size of 5.0 ⁇ m or less and / or component (a) of spherical particles. Can be done.
- the surface roughness of the first surface 5a exceeds 1.0 ⁇ m, the surface roughness can be adjusted to 1.0 ⁇ m or less by, for example, performing a physical smoothing treatment.
- the smoothing treatment can be performed, for example, by pressing the first surface 5a of the adhesive layer 5 via a polyethylene film (PE film), a polyethylene terephthalate film (PET film), or the like.
- the adhesive layer 5 may be heated.
- the pressing can be performed using, for example, a rubber roll, a metal roll, or the like.
- the load at the time of pressing may be 0.01 to 3.0 MPa or 0.3 to 1.0 MPa. When the load at the time of pressing is 0.01 MPa or more, a sufficient smoothing effect tends to be obtained, and when the load at the time of pressing is 3.0 MPa or less, the load on the device is reduced and continuous processing is performed. Tends to be possible.
- the heating temperature at the time of pressing may be room temperature (20 ° C.) to 200 ° C. or 50 ° C. to 140 ° C. When the heating temperature at the time of pressing is 200 ° C. or lower, it tends to be possible to suppress the progress of the curing reaction of the adhesive layer 5.
- the smoothing treatment can be performed under milder conditions by including the epoxy resin in which the component (a) is liquid at 25 ° C. in a predetermined range. By adjusting the conditions of the smoothing treatment (for example, temperature and pressure), the T-shaped peeling strength of the first surface 5a of the adhesive layer 5 and the second surface 2b of the adhesive layer 2 can be improved. ..
- the conditions for the smoothing treatment are, for example, a temperature of 140 ° C.
- factors that affect the T-shaped peeling intensity include the irradiation amount of the active energy rays of the film 10 and the aging conditions (for example, temperature and period).
- the aging conditions are, for example, a temperature of 40 ° C. and a period of 4 days.
- the surface roughness of the first surface 5a is preferably larger than the surface roughness of the second surface 5b.
- the surface roughness of the first surface 5a is 1.0 ⁇ m or less, for example, 0.9 ⁇ m or less, 0.8 ⁇ m or less, or 0.75 ⁇ m or less from the viewpoint of preventing deterioration of adhesiveness due to the surface roughness. You can.
- the surface roughness of the first surface 5a is 0.25 ⁇ m or more, 0.3 ⁇ m or more, 0.4 ⁇ m or more, 0.5 ⁇ m or more, from the viewpoint of preventing deterioration of the anchor effect due to the surface smoothness becoming too high. It may be 0.6 ⁇ m or more, or 0.65 ⁇ m or more.
- the surface roughness of the second surface 5b may be, for example, 0.9 ⁇ m or less, 0.8 ⁇ m or less, 0.7 ⁇ m or less, or less than 0.65 ⁇ m, and is 0.25 ⁇ m or more and 0. It may be 3 ⁇ m or more, 0.4 ⁇ m or more, or 0.45 ⁇ m or more.
- the second surface 5b is in contact with the semiconductor wafer, the base material, or the like.
- the first surface 5a may be exposed by laminating and transferring the film 10 at about 40 to 80 ° C.
- the pressure-sensitive adhesive layer 2 may be made of a pressure-sensitive adhesive used in the field of dicing tape. That is, the pressure-sensitive adhesive layer 2 may be made of a pressure-sensitive pressure-sensitive adhesive or a pressure-sensitive adhesive that is cured by being irradiated with active energy (for example, ultraviolet rays).
- active energy for example, ultraviolet rays
- the pressure-sensitive adhesive layer 2 contains a resin having a carbon-carbon double bond that is reactive to irradiation with active energy rays
- the pressure-sensitive adhesive layer 2 is modified by irradiation with active energy rays, whereby the adhesive layer 2 is modified. Adhesion with metal particles existing on the first surface 5a of 5 is likely to be improved.
- the film constituting the base material layer 1 examples include plastic films such as polytetrafluoroethylene film, polyethylene terephthalate film, polyethylene film, polypropylene film, polymethylpentene film, and polyimide film. Further, the base material layer 1 may be subjected to surface treatment such as primer coating, UV treatment, corona discharge treatment, polishing treatment, and etching treatment, if necessary.
- the film 10 is useful for efficiently manufacturing a semiconductor device having excellent heat dissipation.
- the film 10 is manufactured through the following steps.
- the dose of the active energy ray to the film 10 is, for example, 10 ⁇ 1000 mJ / cm 2, may be 100 ⁇ 700mJ / cm 2 or 200 ⁇ 500mJ / cm 2.
- a suitable adhesive layer may be selected as follows. That is, by implementing a selection method including the following steps, an adhesive layer in which the T-type peeling strength B after irradiation with the active energy ray is larger than the T-shaped peeling strength A before irradiation with the active energy ray is selected. Can be done.
- -A process of irradiating the above dicing / die bonding integrated film with active energy rays -A step of measuring the T-shaped peeling strength A of the adhesive layer 2 and the adhesive layer before irradiation with active energy rays.
- FIG. 3 is a cross-sectional view schematically showing an example of a semiconductor device.
- the semiconductor device 100 shown in this figure includes a substrate 70, four chips S1, S2, S3, S4 laminated on the surface of the substrate 70, electrodes (not shown) on the surface of the substrate 70, and four chips S1. , S2, S3, S4 are electrically connected with wires W1, W2, W3, W4, and a sealing layer 50 for sealing these.
- the substrate 70 is, for example, an organic substrate and may be a metal substrate such as a lead frame. From the viewpoint of suppressing the warp of the semiconductor device 100, the thickness of the substrate 70 is, for example, 70 to 140 ⁇ m, and may be 80 to 100 ⁇ m.
- the four chips S1, S2, S3, and S4 are laminated via the cured product 5C of the adhesive piece 5P.
- the shapes of the chips S1, S2, S3, and S4 in a plan view are, for example, a square or a rectangle.
- the area of the chips S1, S2, S3, S4 is 9 mm 2 or less, and may be 0.1 to 4 mm 2 or 0.1 to 2 mm 2.
- the length of one side of the chips S1, S2, S3, and S4 is, for example, 3 mm or less, and may be 0.1 to 2.0 mm or 0.1 to 1.0 mm.
- the thickness of the chips S1, S2, S3, S4 is, for example, 10 to 170 ⁇ m, and may be 25 to 100 ⁇ m.
- the length of one side of the four chips S1, S2, S3, and S4 may be the same or different from each other, and the thickness is also the same.
- the method for manufacturing the semiconductor device 100 includes the step of preparing the film 10 described above, attaching the wafer W to the adhesive layer 5 of the film 10, and dicing ring DR on the second surface 2b of the adhesive layer 2.
- the step of picking up from the first region 3a of the agent layer 2 and the step of mounting the chip S1 on the substrate 70 via the adhesive piece 5P are included.
- the above-mentioned film 10 is prepared. As shown in FIGS. 4A and 4B, the film 10 is attached so that the adhesive layer 5 is in contact with one surface of the wafer W. Further, the dicing ring DR is attached to the second surface 2b of the pressure-sensitive adhesive layer 2.
- the wafer W is fragmented into chips S.
- the adhesive layer 5 is also individualized to become an adhesive piece 5P.
- Examples of the dicing method include a method using a dicing blade or a laser.
- the wafer W may be thinned by grinding the wafer W prior to dicing the wafer W.
- the adhesive layer 2 is pushed up by the pin 42 while the chips S are separated from each other by expanding the base material layer 1 under normal temperature or cooling conditions.
- the piece 5P is peeled off, and the tip 8 with the adhesive piece is sucked by the suction collet 44 and picked up.
- the manufacturing method of the semiconductor device 100 will be specifically described with reference to FIGS. 5 to 7.
- the first-stage chip S1 (chip S) is crimped to a predetermined position on the substrate 70 via the adhesive piece 5P.
- the adhesive piece 5P is cured by heating.
- the adhesive piece 5P is cured to become a cured product 5C.
- the curing treatment of the adhesive piece 5P may be carried out in a pressurized atmosphere from the viewpoint of reducing voids.
- the second-stage chip S2 is mounted on the surface of the chip S1 in the same manner as the mounting of the chip S1 on the substrate 70. Further, the structure 60 shown in FIG. 6 is manufactured by mounting the third-stage and fourth-stage chips S3 and S4. After the chips S1, S2, S3, S4 and the substrate 70 are electrically connected by wires W1, W2, W3, W4 (see FIG. 7), the semiconductor element and the wire are sealed by the sealing layer 50. The semiconductor device 100 shown in 3 is completed.
- the symbols in Table 1 mean the following components.
- Adhesive varnish A was used to form the adhesive layer.
- the vacuum-defoamed adhesive varnish A was applied onto a polyethylene terephthalate (PET) film (thickness 38 ⁇ m) that had been subjected to a mold release treatment as a support film.
- PET polyethylene terephthalate
- the applied varnish was heat-dried at 90 ° C. for 5 minutes and then at 140 ° C. for 5 minutes in two steps to form a B-stage adhesive layer (thickness 20 ⁇ m) on the support film.
- the surface roughness (arithmetic mean roughness Ra) of the first surface of the adhesive layer (the surface in contact with the adhesive layer) was measured at a magnification of 50 using a shape measuring laser microscope VK-X100 (manufactured by Keyence Co., Ltd.). It was determined by measuring at double. The results are shown in Table 2.
- Thermal conductivity of the measurement sample was calculated by the following formula. The results are shown in Table 2.
- Thermal conductivity (W / m ⁇ K) specific heat (J / kg ⁇ K) x thermal diffusivity (m 2 / s) x specific gravity (kg / m 3 )
- the specific heat, thermal diffusivity, and specific gravity were measured by the following methods. Higher thermal conductivity means better heat dissipation.
- the acrylic resin to be blended in the pressure-sensitive adhesive layer was synthesized as follows. That is, the following components were placed in a flask having a capacity of 2000 ml equipped with a three-one motor, a stirring blade, and a nitrogen introduction tube.
- 2-Hydroxyethyl acrylate 100 g ⁇
- the solution containing the acrylic resin (A) obtained as described above was vacuum dried at 60 ° C. overnight.
- the solid content obtained by this was elementally analyzed by a fully automatic elemental analyzer (manufactured by Elemental Co., Ltd., trade name: varioEL), and the content of the introduced 2-methacryloyloxyethyl isocyanate was calculated from the nitrogen content. , 0.50 mmol / g.
- the polystyrene-equivalent weight average molecular weight of (A) acrylic resin was determined using the following device. That is, SD-8022 / DP-8020 / RI-8020 manufactured by Tosoh Corporation was used, Gelpack GL-A150-S / GL-A160-S manufactured by Hitachi Kasei Co., Ltd. was used for the column, and tetrahydrofuran was used as the eluent. GPC measurement was performed. As a result, the polystyrene-equivalent weight average molecular weight was 800,000. The hydroxyl value and acid value measured according to the method described in JIS K0070 were 61.1 mgKOH / g and 6.5 mgKOH / g.
- a varnish for forming an adhesive layer was prepared by mixing the following components.
- the pressure-sensitive adhesive layer formed by this varnish is cured by being irradiated with ultraviolet rays.
- the amount of ethyl acetate (solvent) was adjusted so that the total solid content of the varnish was 25% by mass.
- a polyethylene terephthalate film (width 450 mm, length 500 mm, thickness 38 ⁇ m) with a mold release treatment on one surface was prepared.
- a varnish for forming an adhesive layer was applied to the surface subjected to the mold release treatment using an applicator, and then dried at 80 ° C. for 5 minutes.
- a laminate (dicing film) composed of a polyethylene terephthalate film and an adhesive layer (thickness 30 ⁇ m) formed on the polyethylene terephthalate film was obtained.
- a polyolefin film (width 450 mm, length 500 mm, thickness 80 ⁇ m) with corona treatment on one side was prepared.
- the surface treated with corona and the pressure-sensitive adhesive layer of the laminated body were bonded together at room temperature.
- the pressure-sensitive adhesive layer was transferred to the polyolefin film (cover film) by pressing with a rubber roll.
- the pressure-sensitive adhesive layer according to this example was obtained by leaving it at room temperature for 3 days.
- a laminated film was obtained by laminating the adhesive layer and the adhesive layer at 25 ° C.
- the laminated film was irradiated with ultraviolet rays of 300 mJ / cm 2 (illuminance: 100 mW / cm 2).
- a dicing / die bonding integrated film according to Example 1 was obtained through a step of aging for 4 days under a temperature condition of 40 ° C.
- T-shaped peeling strength The T-shaped peeling strength at the interface between the adhesive layer and the pressure-sensitive adhesive layer is measured according to the method described in JIS K6854-3: 1999 "Adhesive-Peeling Adhesive Strength Test Method-Part 3: T-shaped Peeling". did. The following conditions were set as follows. The results are shown in Table 2. ⁇ Temperature: 23 °C ⁇ Width of test piece: 25 mm ⁇ Peeling speed: 10 mm / min
- the silicon wafer with the dicing / die bonding integrated film was separated into a plurality of chips with adhesive pieces (size 2 mm ⁇ 2 mm) by blade dicing. After dicing, the presence or absence of tip flying was confirmed. The results are shown in Table 2.
- Dicer DFD6361 (manufactured by Disco Corporation) -Blade: ZH05-SD4000-N1-70-BB (manufactured by Disco Corporation) ⁇ Blade rotation speed: 40,000 rpm ⁇ Dicing speed: 30 mm / sec ⁇ Blade height: 90 ⁇ m ⁇ Depth of cut from the surface of the dicing film base material: 20 ⁇ m ⁇ Amount of water during dicing Blade cooler: 1.5 L / min shower: 1.0 L / min Spray: 1.0 L / min
- Example 2 Except for the fact that the adhesive varnish B was used to form the adhesive layer and that the second surface of the adhesive layer was smoothed before the adhesive layer and the adhesive layer were bonded together.
- a dicing / die bonding integrated film was obtained in the same manner as in Example 1. The evaluation results are shown in Table 2. The conditions for the smoothing process were as follows. ⁇ Temperature 140 °C ⁇ Pressure 0.5MPa ⁇ Speed 0.1m / min
- a method capable of efficiently manufacturing a semiconductor device having excellent heat dissipation is provided. Further, according to the present disclosure, a method for selecting an adhesive layer useful for efficiently manufacturing the semiconductor device, a dicing / die bonding integrated film provided with the adhesive layer, and a method for manufacturing the same are provided. To.
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Abstract
Description
(A)基材層と、粘着剤層と、接着剤層とをこの順序で備えるダイシング・ダイボンディング一体型フィルムを準備する工程
(B)上記一体型フィルムに向けて活性エネルギー線を照射する工程
(C)上記一体型フィルムの接着剤層に対してウェハを貼る工程
(D)ウェハ及び接着剤層を個片化することによって複数の接着剤片付きチップを得る工程
(E)接着剤片付きチップを粘着剤層からピックアップする工程
(F)接着剤片付きチップを、基板又は他のチップ上にマウントする工程
・基材層と、基材層の一方の面上に設けられた粘着剤層とを備えるダイシングフィルムを準備する工程
・粘着剤層の表面上に、接着剤層の全質量基準で75質量%以上の金属粒子を含む接着剤層を形成することによってダイシング・ダイボンディング一体型フィルムを得る工程
・上記一体型フィルムに向けて活性エネルギー線を照射する工程
・活性エネルギー線の照射前における粘着剤層と接着剤層のT形はく離強度Aを測定する工程
・活性エネルギー線の照射後における粘着剤層と接着剤層のT形はく離強度Bを測定する工程
・基材層と、基材層の一方の面上に設けられた粘着剤層とを備えるダイシングフィルムを準備する工程
・粘着剤層の表面上に、接着剤層の全質量基準で75質量%以上の金属粒子を含む接着剤層を形成することによってダイシング・ダイボンディング一体型フィルムを得る工程
・上記ダイシング・ダイボンディング一体型フィルムに向けて活性エネルギー線を照射することによって、粘着剤層と接着剤層のT形はく離強度を増大させる工程
図1(a)は、本実施形態に係るダイシング・ダイボンディング一体型フィルムを示す平面図であり、図1(b)は、図1(a)のB-B線に沿った模式断面図である。図2はダイシング・ダイボンディング一体型フィルム10(以下、場合により、単に「フィルム10」という。)の粘着剤層2の周縁部にダイシングリングDRが貼り付けられるとともに、接着剤層5の表面にウェハWが貼り付けられた状態を示す模式図である。フィルム10は、ウェハWを複数のチップに個片化するダイシング工程及びその後のピックアップ工程を含む半導体装置の製造プロセスに適用されるものである(図4(c)及び図4(d)参照)。なお、本実施形態においては、正方形の基材層1の上に、粘着剤層2及び接着剤層5の積層体が一つ形成された態様を例示したが、基材層1が所定の長さ(例えば、100m以上)を有し、その長手方向に並ぶように、粘着剤層2及び接着剤層5の積層体が所定の間隔で配置された態様であってもよい。フィルム10は、接着剤層5を覆うカバーフィルム(不図示)を更に備えてもよい。
接着剤層5は、(a)金属粒子を含有し、必要に応じて、(b)熱硬化性樹脂、(c)硬化剤、及び(d)エラストマーを更に含有していてもよい。接着剤層5は、熱硬化性であり、半硬化(Bステージ)状態を経て、硬化処理後に完全硬化物(Cステージ)状態となり得る。
(a)成分は、接着剤層5の熱伝導性を高め、半導体装置の放熱性を高めるために用いられる成分である。(a)成分としては、例えば、ニッケル粒子、銅粒子、銀粒子、アルミニウム粒子が挙げられる。(a)成分として、基材粒子(例えば、金属粒子又は樹脂粒子)の表面を金属で被覆した粒子を使用してもよい。これらは、1種を単独で又は2種以上を組み合わせて用いてもよい。これらの中でも、(a)成分は、酸化され難いことから、銀粒子又は金属粒子(例えば、銅粒子等)の表面を銀で被覆した粒子であってよい。
(b)成分は、加熱等によって、分子間で三次元的な結合を形成し硬化する性質を有する成分であり、硬化後に接着作用を示す成分である。(b)成分は、エポキシ樹脂であってよい。(b)成分は、25℃で液状のエポキシ樹脂を含んでいてもよい。エポキシ樹脂は、分子内にエポキシ基を有するものであれば、特に制限なく用いることができる。エポキシ樹脂は、分子内に2以上のエポキシ基を有しているものであってよい。
(c)成分は、エポキシ樹脂の硬化剤となり得るフェノール樹脂であってよい。フェノール樹脂は、分子内にフェノール性水酸基を有するものであれば特に制限なく用いることができる。フェノール樹脂としては、例えば、フェノール、クレゾール、レゾルシン、カテコール、ビスフェノールA、ビスフェノールF、フェニルフェノール、アミノフェノール等のフェノール類及び/又はα-ナフトール、β-ナフトール、ジヒドロキシナフタレン等のナフトール類とホルムアルデヒド等のアルデヒド基を有する化合物とを酸性触媒下で縮合又は共縮合させて得られるノボラック型フェノール樹脂、アリル化ビスフェノールA、アリル化ビスフェノールF、アリル化ナフタレンジオール、フェノールノボラック、フェノール等のフェノール類及び/又はナフトール類とジメトキシパラキシレン又はビス(メトキシメチル)ビフェニルから合成されるフェノールアラルキル樹脂、ナフトールアラルキル樹脂、ビフェニルアラルキル型フェノール樹脂、フェニルアラルキル型フェノール樹脂などが挙げられる。これらは、1種を単独で又は2種以上を組み合わせて用いてもよい。
(d)成分としては、例えば、ポリイミド樹脂、アクリル樹脂、ウレタン樹脂、ポリフェニレンエーテル樹脂、ポリエーテルイミド樹脂、フェノキシ樹脂、変性ポリフェニレンエーテル樹脂等であって、架橋性官能基を有するものが挙げられる。ここで、アクリル樹脂とは、(メタ)アクリル酸エステルに由来する構成単位を含むポリマーを意味する。アクリル樹脂は、構成単位として、エポキシ基、アルコール性又はフェノール性水酸基、カルボキシ基等の架橋性官能基を有する(メタ)アクリル酸エステルに由来する構成単位を含むポリマーであってよい。また、アクリル樹脂は、(メタ)アクリル酸エステルとアクリルニトリルとの共重合体等のアクリルゴムであってもよい。これらは、1種を単独で又は2種以上を組み合わせて用いてもよい。
ポンプ:L-6000(株式会社日立製作所製)
カラム:ゲルパック(Gelpack)GL-R440(日立化成株式会社製)、ゲルパック(Gelpack)GL-R450(日立化成株式会社製)、及びゲルパックGL-R400M(日立化成株式会社製)(各10.7mm(直径)×300mm)をこの順に連結したカラム
溶離液:テトラヒドロフラン(以下、「THF」という。)
サンプル:試料120mgをTHF5mLに溶解させた溶液
流速:1.75mL/分
接着剤層5は、(e)硬化促進剤を更に含有していてもよい。接着剤層5が(e)成分を含有することによって、接着性と接続信頼性とをより両立することができる傾向にある。(e)成分としては、例えば、イミダゾール類及びその誘導体、有機リン系化合物、第二級アミン類、第三級アミン類、第四級アンモニウム塩等が挙げられる。これらは、1種を単独で又は2種以上を組み合わせて用いてもよい。これらの中でも、(e)成分は、反応性の観点から、イミダゾール類及びその誘導体であってよい。
粘着剤層2は、ダイシングテープの分野で使用される粘着剤からなるものであればよい。すなわち、粘着剤層2は、感圧型の粘着剤からなるものであっても、活性エネルギー(例えば紫外線)が照射されることによって硬化する粘着剤からなるものであってもよい。活性エネルギー線の照射に対する反応性を有する炭素-炭素二重結合を有する樹脂を粘着剤層2が含有する場合、活性エネルギー線の照射によって粘着剤層2が改質され、これにより、接着剤層5の第1の表面5aに存在する金属粒子との密着性が向上しやすい。
フィルム10は、優れた放熱性を有する半導体装置を効率的に製造するのに有用である。フィルム10は以下の工程を経て製造される。
・基材層1と、基材層1の一方の面上に設けられた粘着剤層2とを備えるダイシングフィルム3を準備する工程。
・粘着剤層2の表面上に接着剤層5を形成することによってダイシング・ダイボンディング一体型フィルムを得る工程。
・ダイシング・ダイボンディング一体型フィルムに向けて活性エネルギー線を照射することによって、粘着剤層と接着剤層のT形はく離強度を増大したフィルム10を得る工程。
フィルム10を製造するに先立ち、好適な接着剤層(ダイボンディングフィルム)を以下のようにして選定してもよい。すなわち、以下の工程を含む選定方法を実施することで、活性エネルギー線の照射後のT形はく離強度Bが活性エネルギー線の照射前におけるT形はく離強度Aよりも大きい接着剤層を選定することができる。
・基材層1と、基材層1の一方の面上に設けられた粘着剤層2とを備えるダイシングフィルム3を準備する工程。
・粘着剤層2の表面上に接着剤層を形成することによってダイシング・ダイボンディング一体型フィルムを得る工程。
・上記ダイシング・ダイボンディング一体型フィルムに向けて活性エネルギー線を照射する工程。
・活性エネルギー線の照射前における粘着剤層2と接着剤層のT形はく離強度Aを測定する工程。
・活性エネルギー線の照射後における粘着剤層2と接着剤層のT形はく離強度Bを測定する工程。
図3は半導体装置の一例を模式的に示す断面図である。この図に示す半導体装置100は、基板70と、基板70の表面上に積層された四つのチップS1,S2,S3,S4と、基板70の表面上の電極(不図示)と四つのチップS1,S2,S3,S4とを電気的に接続するワイヤW1,W2,W3,W4と、これらを封止している封止層50とを備える。
表1に示す記号及び組成比(単位:質量%)で、(b)熱硬化性樹脂としてのエポキシ樹脂、(c)硬化剤としてのフェノール樹脂、及び(d)エラストマーとしてのアクリルゴムにシクロヘキサノンを加え、撹拌し混合物を得た。各成分が溶解した後、混合物に(a)金属粒子を加えて、ディスパー翼を用いて撹拌し、各成分が均一になるまで分散した。その後、(e)硬化促進剤を加え、各成分が均一になるまで分散することによって、接着剤ワニスA~Cを得た。
(a)金属粒子
・20%Ag-Cu-MA(福田金属箔粉工業株式会社製、銀コート銅粉の製品名、形状:フレーク状、平均粒径(レーザー50%粒径(D50)):6.0~8.8μm)
(b)熱硬化性樹脂
・EXA-830CRP(商品名、DIC株式会社製、ビスフェノール型エポキシ樹脂、エポキシ当量:159g/eq、25℃で液状)
・N500P-10(商品名、DIC株式会社製、ビスフェノール型エポキシ樹脂、エポキシ当量:203g/eq)
・YDCN-700-10(商品名、日鉄ケミカル&マテリアル株式会社製、クレゾールノボラック型エポキシ樹脂、エポキシ当量:215g/eq)
(c)硬化剤
・MEH-7800M(商品名、明和化成株式会社製、フェノール樹脂、粘度(150℃):0.31~0.43Pa・s(3.1~4.3poise)、水酸基当量:175g/eq)
・HE-100C-30(商品名、エア・ウォーター株式会社製、フェニルアラキル型フェノール樹脂、粘度(150℃):0.27~0.41Pa・s(2.7~4.1poise)、水酸基当量:170g/eq)
(d)エラストマー
・HTR-860P-3(商品名、ナガセケムテックス株式会社製、グリシジル基含有アクリルゴム、重量平均分子量:100万、Tg:-7℃)
(e)硬化促進剤
・キュアゾール2PZ-CN(商品名、四国化成工業株式会社製、1-シアノエチル-2-フェニルイミダゾール)
[接着剤層の形成]
接着剤層の形成に、接着剤ワニスAを用いた。真空脱泡した接着剤ワニスAを、支持フィルムとしての離型処理を施したポリエチレンテレフタレート(PET)フィルム(厚さ38μm)上に塗布した。塗布したワニスを、90℃で5分間、続いて140℃で5分間の二段階で加熱乾燥し、支持フィルム上に、Bステージ状態の接着剤層(厚さ20μm)を形成した。
接着剤層の第1の表面(粘着剤層と接する側の面)の表面粗さ(算術平均粗さRa)を、形状測定レーザマイクロスコープVK-X100(キーエンス株式会社製)を用いて倍率50倍で測定することによって求めた。結果を表2に示す。
(測定試料の作製)
Leon13DX(株式会社ラミーコーポレーション製)を用いて、厚さが100μm以上になるように接着剤層を70℃でラミネートして積層体を得た。積層体に対して、110℃で30分間、175℃で180分間の熱履歴を与え、測定試料を得た。
測定試料の熱伝導率は、下記式によって算出した。結果を表2に示す。
熱伝導率(W/m・K)=比熱(J/kg・K)×熱拡散率(m2/s)×比重(kg/m3)
なお、比熱、熱拡散率、及び比重は以下の方法によって測定した。熱伝導率が高くなることは、放熱性により優れることを意味する。
・測定装置:示差走査熱量測定装置(株式会社パーキンエルマージャパン製、商品名:DSC8500)
・基準物質:サファイア
・昇温速度:10℃/分
・昇温温度範囲:20℃~100℃
・測定装置:熱拡散率測定装置(ネッチ・ジャパン株式会社社製、商品名:LFA467 HyperFlash)
・測定試料の処理:測定試料の両面をカーボンスプレーで黒化処理
・測定方法:キセノンフラッシュ法
・測定雰囲気温度:25℃
・測定装置:電子比重計(アルファミラージュ株式会社製、商品名:SD200L)
・測定方法:アルキメデス法
粘着剤層に配合するアクリル樹脂を次のようにして合成した。すなわち、スリーワンモータ、撹拌翼、窒素導入管が備え付けられた容量2000mlのフラスコに以下の成分を入れた。
・酢酸エチル(溶剤):635g
・2-エチルヘキシルアクリレート:395g
・2-ヒドロキシエチルアクリレート:100g
・メタクリル酸:5g
・アゾビスイソブチロニトリル:0.08g
・(A)アクリル樹脂溶液:100g(固形分)
・(B)光重合開始剤(1-ヒドロキシシクロヘキシルフェニルケトン、チバスペシャリティケミカルズ株式会社製、イルガキュア184、「イルガキュア」は登録商標):0.8g
・(B)光重合開始剤(ビス(2,4,6-トリメチルベンゾイル)-フェニルフォスフィンオキサイド、チバスペシャリティケミカルズ株式会社製、イルガキュア819、「イルガキュア」は登録商標):0.2g
・(C)架橋剤(多官能イソシアネート、日本ポリウレタン工業株式会社製、コロネートL、固形分:75%):8.0g(固形分)
・酢酸エチル(溶剤)
接着剤層と粘着剤層を25℃で貼り合わせることによって、積層フィルムを得た。この積層フィルムに対して300mJ/cm2の紫外線(照度:100mW/cm2)を照射した。その後、40℃の温度条件で4日にわたってエイジングする工程を経て実施例1に係るダイシング・ダイボンディング一体型フィルムを得た。
接着剤層と粘着剤層の界面のT形はく離強度を、JIS K6854-3:1999「接着剤-はく離接着強さ試験方法-第3部:T形はく離」に記載の方法に準拠して測定した。以下の条件は以下のとおりとした。結果を表2に示す。
・温度:23℃
・試験片の幅:25mm
・はく離速度:10mm/分
シリコンウェハ(直径:12インチ、厚さ:50μm)及びダイシングリングにダイシング・ダイボンディング一体型フィルムを以下条件で貼り付けた。シリコンウェハ及びダイシングリングを貼り付けた後のダイシング・ダイボンディング一体型フィルムのMD方向の伸びは、1.0~1.3%程度であった。
(貼付条件)
・貼付装置:DFM2800(株式会社ディスコ製)
・貼付温度:70℃
・貼付速度:10mm/s
・貼付テンションレベル:レベル6
(ダイシング条件)
・ダイサー:DFD6361(株式会社ディスコ製)
・ブレード:ZH05-SD4000-N1-70-BB(株式会社ディスコ製)
・ブレード回転数:40000rpm
・ダイシング速度:30mm/秒
・ブレードハイト:90μm
・ダイシングフィルムの基材表面からの切り込み深さ:20μm
・ダイシング時の水量
ブレードクーラー:1.5L/分
シャワー:1.0L/分
スプレー:1.0L/分
接着剤層と粘着剤層の積層フィルムに対して紫外線を照射しなかったことの他は、実施例1と同様にしてダイシング・ダイボンディング一体型フィルムを得た。評価結果を表2に示す。
接着剤層の形成に接着剤ワニスBを使用したこと、及び、接着剤層と粘着剤層を貼り合わせる前に、接着剤層の第2の表面の平滑化処理を行ったことの他は実施例1と同様にしてダイシング・ダイボンディング一体型フィルムを得た。評価結果を表2に示す。なお、平滑化処理の条件は以下のとおりとした。
・温度140℃
・圧力0.5MPa
・速度0.1m/分
接着剤層と粘着剤層の積層フィルムに対して紫外線を照射しなかったことの他は、実施例2と同様にしてダイシング・ダイボンディング一体型フィルムを得た。評価結果を表2に示す。
接着剤層の形成に接着剤ワニスCを使用したことの他は実施例1と同様にしてダイシング・ダイボンディング一体型フィルムを得た。評価結果を表2に示す。
接着剤層と粘着剤層の積層フィルムに対して紫外線を照射しなかったことの他は比較例3と同様にしてダイシング・ダイボンディング一体型フィルムを得た。評価結果を表2に示す。
Claims (11)
- (A)基材層と、粘着剤層と、接着剤層とをこの順序で備えるダイシング・ダイボンディング一体型フィルムを準備する工程と、
(B)前記ダイシング・ダイボンディング一体型フィルムに向けて活性エネルギー線を照射する工程と、
(C)前記接着剤層に対してウェハを貼る工程と、
(D)前記ウェハ及び前記接着剤層を個片化することによって複数の接着剤片付きチップを得る工程と、
(E)前記接着剤片付きチップを前記粘着剤層からピックアップする工程と、
(F)前記接着剤片付きチップを、基板又は他のチップ上にマウントする工程と、
を含み、
前記接着剤層が当該接着剤層の全質量基準で75質量%以上の金属粒子を含有する、半導体装置の製造方法。 - 前記活性エネルギー線の照射後における前記粘着剤層と前記接着剤層のT形はく離強度Bが、前記活性エネルギー線の照射前におけるT形はく離強度Aよりも大きい、請求項1に記載の半導体装置の製造方法。
- 前記粘着剤層が、前記活性エネルギー線の照射に対する反応性を有する炭素-炭素二重結合を有する樹脂を含有する、請求項1又は2に記載の半導体装置の製造方法。
- 基材層及び粘着剤層とともにダイシング・ダイボンディング一体型フィルムを構成する接着剤層の選定方法であって、
基材層と、前記基材層の一方の面上に設けられた粘着剤層とを備えるダイシングフィルムを準備する工程と、
前記粘着剤層の表面上に、当該接着剤層の全質量基準で75質量%以上の金属粒子を含む接着剤層を形成することによってダイシング・ダイボンディング一体型フィルムを得る工程と、
前記ダイシング・ダイボンディング一体型フィルムに向けて活性エネルギー線を照射する工程と、
前記活性エネルギー線の照射前における前記粘着剤層と前記接着剤層のT形はく離強度Aを測定する工程と、
前記活性エネルギー線の照射後における前記粘着剤層と前記接着剤層のT形はく離強度Bを測定する工程と、
を含み、
前記活性エネルギー線の照射後のT形はく離強度Bが前記活性エネルギー線の照射前におけるT形はく離強度Aよりも大きい前記接着剤層を選定する、接着剤層の選定方法。 - 前記活性エネルギー線の照射後におけるT形はく離強度Bが0.07N/25mm以上である、請求項4に記載の接着剤層の選定方法。
- 前記活性エネルギー線の照射後におけるT形はく離強度Bが0.5N/25mm以下である、請求項4又は5に記載の接着剤層の選定方法。
- 基材層と、粘着剤層と、接着剤層とをこの順序で備えるダイシング・ダイボンディング一体型フィルムの製造方法であって、
基材層と、前記基材層の一方の面上に設けられた粘着剤層とを備えるダイシングフィルムを準備する工程と、
前記粘着剤層の表面上に、当該接着剤層の全質量基準で75質量%以上の金属粒子を含む接着剤層を形成することによってダイシング・ダイボンディング一体型フィルムを得る工程と、
前記ダイシング・ダイボンディング一体型フィルムに向けて活性エネルギー線を照射することによって、前記粘着剤層と前記接着剤層のT形はく離強度を増大させる工程と、
を含む、ダイシング・ダイボンディング一体型フィルムの製造方法。 - 前記接着剤層が請求項4~6のいずれか一項に記載の選定方法によって選定された接着剤層である、請求項7に記載のダイシング・ダイボンディング一体型フィルムの製造方法。
- 基材層と、
前記基材層と対面する第1の表面及びその反対側の第2の表面を有する粘着剤層と、
前記第2の表面の中央部を覆うように設けられた接着剤層と、
を備え、
前記接着剤層は、当該接着剤層の全質量基準で75質量%以上の金属粒子を含有し、
前記粘着剤層と前記接着剤層の界面は、前記接着剤層におけるウェハの貼付け位置に対応する領域であってエネルギー線が照射された領域を有し、
当該領域における前記粘着剤層と前記接着剤層のT形はく離強度が0.07N/25mm以上である、ダイシング・ダイボンディング一体型フィルム。 - 前記粘着剤層と前記接着剤層のT形はく離強度が0.5N/25mm以下である、請求項9に記載のダイシング・ダイボンディング一体型フィルム。
- 前記接着剤層が熱硬化性樹脂成分を含み、
熱硬化後の前記接着剤層の熱伝導率が1.5~20W/m・Kである、請求項9又は10に記載のダイシング・ダイボンディング一体型フィルム。
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005033170A (ja) * | 2003-06-18 | 2005-02-03 | Furukawa Electric Co Ltd:The | 粘接着テープ |
| JP2008218571A (ja) * | 2007-03-01 | 2008-09-18 | Nitto Denko Corp | ダイシング・ダイボンドフィルム |
| JP2016103524A (ja) * | 2014-11-27 | 2016-06-02 | 日東電工株式会社 | 導電性フィルム状接着剤、フィルム状接着剤付きダイシングテープ及び半導体装置の製造方法 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| JP2008218571A (ja) * | 2007-03-01 | 2008-09-18 | Nitto Denko Corp | ダイシング・ダイボンドフィルム |
| JP2016103524A (ja) * | 2014-11-27 | 2016-06-02 | 日東電工株式会社 | 導電性フィルム状接着剤、フィルム状接着剤付きダイシングテープ及び半導体装置の製造方法 |
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| KR20220134568A (ko) * | 2021-03-26 | 2022-10-05 | 후루카와 덴키 고교 가부시키가이샤 | 다이싱 다이어태치 필름 및 그 제조 방법과 반도체 패키지 및 그 제조 방법 |
| JP2022150243A (ja) * | 2021-03-26 | 2022-10-07 | 古河電気工業株式会社 | ダイシングダイアタッチフィルム及びその製造方法、並びに半導体パッケージ及びその製造方法 |
| CN115428126A (zh) * | 2021-03-26 | 2022-12-02 | 古河电气工业株式会社 | 切晶粘晶膜及其制造方法、以及半导体封装及其制造方法 |
| TWI828076B (zh) * | 2021-03-26 | 2024-01-01 | 日商古河電氣工業股份有限公司 | 切晶黏晶膜及其製造方法、以及半導體封裝及其製造方法 |
| KR102722012B1 (ko) * | 2021-03-26 | 2024-10-28 | 후루카와 덴키 고교 가부시키가이샤 | 다이싱 다이어태치 필름 및 그 제조 방법과 반도체 패키지 및 그 제조 방법 |
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