WO2009099191A1 - 半導体用フィルム、半導体装置の製造方法および半導体装置 - Google Patents
半導体用フィルム、半導体装置の製造方法および半導体装置 Download PDFInfo
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- WO2009099191A1 WO2009099191A1 PCT/JP2009/052075 JP2009052075W WO2009099191A1 WO 2009099191 A1 WO2009099191 A1 WO 2009099191A1 JP 2009052075 W JP2009052075 W JP 2009052075W WO 2009099191 A1 WO2009099191 A1 WO 2009099191A1
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Definitions
- the present invention relates to a film for semiconductor, a method for manufacturing a semiconductor device, and a semiconductor device.
- an adhesive sheet (dicing sheet) is attached to a semiconductor wafer made of silicon, gallium, arsenic, and the like, cut into individual semiconductor elements by dicing (divided into individual pieces), The semiconductor elements separated and separated are picked up, and then transferred to a semiconductor device assembly process in which the semiconductor elements are die-bonded to a metal lead frame, a tape substrate, an organic hard substrate, or the like.
- a typical example of this area mounting method is flip chip mounting.
- flip-chip mounting it is common to seal a gap between a semiconductor element and a circuit board with a resin composition for the purpose of reinforcing joints and improving reliability.
- a method called a stacked package in which semiconductor elements are three-dimensionally stacked has become mainstream.
- the package can be made small.
- the information exchanged between the semiconductor elements can be increased, the overall performance is improved.
- MCP multi-chip package
- TSV Through Silicon Via
- a hole is formed in the semiconductor element to fill the metal, and the connection between the semiconductor elements is performed.
- this method there is an advantage that the distance between the semiconductor elements can be narrowed because a connection wire is not required. For this reason, it is thought that this method will become the mainstream in the future as a method for three-dimensionally stacking semiconductor elements.
- Even in the method using the through electrode it is common to seal the gap between the semiconductor element and the circuit board with a resin composition for the purpose of reinforcing the joint portion and improving the reliability.
- a capillary underfill method is generally used as a resin sealing method. This method is performed by applying a liquid sealing resin composition to one side or a plurality of surfaces of a semiconductor element and flowing the sealing resin composition into the gap between the circuit board and the semiconductor element by utilizing a capillary phenomenon.
- the cavity underfill method requires a process of bonding a semiconductor element and a circuit board using a flux and a flux cleaning process, which requires a longer process and stricter environmental management such as cleaning waste liquid processing problems. There must be. Further, since the sealing is performed by a capillary phenomenon, the sealing time becomes long and there is a problem in productivity.
- the back grind tape is pressure-bonded to the device functional surface of the processed wafer, the back surface of the wafer is ground, then the tape is peeled off, pressure-bonded to the dicing tape, and separated and joined by dicing. Therefore, a simpler method is demanded. Further, the ground thin wafer has a problem that it is damaged during transportation and handling.
- cured material of the adhesive bond layer of the said film for semiconductors. Another object of the present invention is to provide a semiconductor device in which a semiconductor element and a structure including a substrate are suitably bonded.
- the initial melt viscosity decreases, and after reaching the minimum melt viscosity, further increases And the minimum melt viscosity is 10 Pa ⁇ s or more and 10,000 Pa ⁇ s or less.
- the film for semiconductors as described in said (1) which has a release film between the said sheet
- the said adhesive layer of the said film for semiconductors has the transparency of the grade which can recognize the said surface of the said semiconductor element in the state adhere
- the film for semiconductor according to (1), wherein the compound having flux activity is a curing agent having flux activity.
- the compound having the flux activity is a compound having at least one of a carboxyl group and a phenolic hydroxyl group.
- the structure includes the substrate and another semiconductor element mounted on one surface side of the substrate, The method for manufacturing a semiconductor device according to (15), wherein, in the mounting step, the semiconductor element is mounted on the other surface side of the other semiconductor element of the structure.
- the structure may include another adhesive layer in which the other semiconductor element and the substrate are made of a cured product of a resin composition including a resin capable of crosslinking reaction and a compound having flux activity, The method for manufacturing a semiconductor device according to (16), wherein the semiconductor device is bonded.
- the semiconductor wafer has a plurality of conductor portions penetrating in the thickness direction thereof.
- a semiconductor device comprising a cured product of the adhesive layer of the semiconductor film according to (1).
- a semiconductor device comprising a substrate, a first semiconductor element provided on at least one surface side of the substrate, and a second semiconductor element having a conductor portion penetrating in the thickness direction, The first semiconductor element and the second semiconductor element are electrically connected via a protruding electrode; Between the first semiconductor element and the second semiconductor element, a first adhesive layer made of a cured product of a resin composition containing a resin capable of crosslinking reaction and a compound having flux activity is disposed. A semiconductor device. (22) The substrate and the first semiconductor element are electrically connected via a protruding electrode, and a resin capable of crosslinking reaction and flux activity between the substrate and the first semiconductor element.
- the compound having the flux activity is a compound having at least one of a carboxyl group and a phenolic hydroxyl group.
- the compound having the flux activity can act as a curing agent for the resin capable of crosslinking reaction.
- FIG. 1 is a cross-sectional view schematically showing a semiconductor film of the present invention.
- FIG. 2 is a cross-sectional view schematically showing an example of a method for producing a semiconductor film of the present invention.
- FIG. 3 is a cross-sectional view schematically showing an example of a method for manufacturing a semiconductor device of the present invention.
- FIG. 4 is a cross-sectional view schematically showing an example of a method for manufacturing a semiconductor device of the present invention.
- FIG. 5 is a cross-sectional view schematically showing an example of a method for manufacturing a semiconductor device of the present invention.
- FIG. 6 is a sectional view showing an example (another embodiment) of the semiconductor device of the present invention.
- FIG. 7 is a cross-sectional view showing an example (another embodiment) of a method for manufacturing a semiconductor device of the present invention.
- the film for semiconductor of the present invention is a film for semiconductor having a sheet substrate and an adhesive layer provided on one surface side of the sheet substrate, and the adhesive layer is a resin capable of crosslinking reaction. And a resin composition containing a compound having flux activity.
- the method for manufacturing a semiconductor device of the present invention includes a bonding step of bonding the adhesive layer of the semiconductor film and one surface of the semiconductor wafer, and a state where the semiconductor film is bonded to the semiconductor wafer. And a pick-up process for picking up a semiconductor element having the adhesive layer by separating the film for semiconductor into a piece between the sheet base material and the adhesive layer. And a mounting step of mounting the semiconductor element on a structure including a substrate so that the adhesive layer adheres.
- the semiconductor device of this invention has the hardened
- the semiconductor device of the present invention is a semiconductor device having a substrate, a first semiconductor element provided on at least one surface side of the substrate, and a second semiconductor element having a conductor portion penetrating in the thickness direction. The first semiconductor element and the second semiconductor element are electrically connected via a protruding electrode, and a bridging reaction occurs between the first semiconductor element and the second semiconductor element.
- a first adhesive layer composed of a cured product of a resin composition containing a possible resin and a compound having flux activity is arranged.
- the semiconductor film 10 includes a sheet substrate 1 and an adhesive layer 2 provided on the upper surface (one surface) of the sheet substrate 1.
- a release film may be provided between the sheet substrate 1 and the adhesive layer 2.
- the adhesive layer 2 of the semiconductor film 10 is composed of a resin composition containing a resin capable of crosslinking reaction and a compound having flux activity.
- the resin capable of crosslinking reaction include those classified into so-called thermosetting resins such as epoxy resins, oxetane resins, phenol resins, (meth) acrylate resins, unsaturated polyester resins, diallyl phthalate resins, and maleimide resins.
- thermosetting resins such as epoxy resins, oxetane resins, phenol resins, (meth) acrylate resins, unsaturated polyester resins, diallyl phthalate resins, and maleimide resins.
- Thermoplastic resins having a functional group such as a carboxyl group and an epoxy group.
- an epoxy resin is suitably used because it is excellent in curability and storage stability of the adhesive layer 2 and heat resistance, moisture resistance, and chemical resistance of the cured product of the adhesive layer 2.
- epoxy resin either an epoxy resin that is solid at room temperature or an epoxy resin that is liquid at room temperature may be used. Further, an epoxy resin that is solid at room temperature and an epoxy resin that is liquid at room temperature may be used in combination. Thereby, the design freedom of the melting behavior of the adhesive layer 2 can be further increased.
- the epoxy resin that is solid at room temperature is not particularly limited, and is a novolak such as a bisphenol A type epoxy resin, a bisphenol type epoxy resin such as a bisphenol S type epoxy resin, a phenol novolac type epoxy resin, or a cresol novolak type epoxy resin.
- the epoxy resin that is solid at room temperature preferably includes a trifunctional epoxy resin and a cresol novolac epoxy resin that are solid at room temperature.
- the epoxy resin that is liquid at room temperature is not particularly limited, and is bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol A nuclear hydrogenated type epoxy resin, 4-t-butylcatechol type epoxy resin, naphthalene. Type epoxy resin and the like.
- the content of the resin capable of crosslinking reaction is not particularly limited, but is preferably 25% by weight or more and 75% by weight or less of the entire resin composition, and particularly 45% by weight or more and 70% by weight or less. Is preferred. When the content is within the above range, good curability of the adhesive layer 2 can be obtained, and a good melting behavior of the adhesive layer 2 can be designed.
- the compound having the flux activity is not particularly limited as long as it has an effect of removing the metal oxide film by heating or the like.
- an organic acid such as an active rosin or an organic compound having a carboxy group, an amine, a phenol, an alcohol, an azine, or the like may have a flux activity by itself or promote a flux activity.
- the compound having the flux activity includes a compound having at least one carboxyl group and / or phenolic hydroxyl group in the molecule, which may be liquid or solid.
- Examples of the compound containing a carboxyl group include aliphatic acid anhydrides, alicyclic acid anhydrides, aromatic acid anhydrides, aliphatic carboxylic acids, and aromatic carboxylic acids.
- Examples of the flux compound having a phenolic hydroxyl group include phenols.
- aliphatic acid anhydride examples include succinic anhydride, polyadipic acid anhydride, polyazeline acid anhydride, polysebacic acid anhydride, and the like.
- Examples of the alicyclic acid anhydride include methyltetrahydrophthalic anhydride, methylhexahydrophthalic anhydride, methylhymic anhydride, hexahydrophthalic anhydride, tetrahydrophthalic anhydride, trialkyltetrahydrophthalic anhydride, methylcyclohexene dicarboxylic acid.
- An acid anhydride etc. are mentioned.
- aromatic acid anhydride examples include phthalic anhydride, trimellitic anhydride, pyromellitic anhydride, benzophenone tetracarboxylic anhydride, ethylene glycol bistrimellitate, glycerol tris trimellitate, and the like.
- Examples of the aliphatic carboxylic acid include compounds represented by the following formula (1).
- the compound represented by the formula (1) includes flux activity, the amount of outgas that may be generated when the adhesive layer 2 is bonded to an adherend, and a cured product of the adhesive layer 2 (for example, the first to be described later).
- n in the formula (1) is not particularly limited, but is preferably 3 or more and 10 or less, particularly 4 or more and 8 or less, from the balance of elastic modulus and glass transition temperature of the 1 adhesive layer 122). It is preferable.
- n more than the said lower limit, the increase in the elasticity modulus of the hardened
- n below the upper limit it is possible to suppress a decrease in the elastic modulus of the cured product of the adhesive layer 2 and to further improve the connection reliability of the resulting semiconductor device.
- aliphatic carboxylic acids include formic acid, acetic acid, propionic acid, butyric acid, valeric acid, caproic acid pivalate, caprylic acid, lauric acid, myristic acid, palmitic acid, stearic acid, acrylic acid, methacrylic acid, crotonic acid, Examples include oleic acid, fumaric acid, maleic acid, oxalic acid, malonic acid, and oxalic acid.
- aromatic carboxylic acid examples include benzoic acid, phthalic acid, isophthalic acid, terephthalic acid, hemimellitic acid, trimellitic acid, trimesic acid, merophanic acid, platnic acid, pyromellitic acid, merit acid, triyl acid, and xylyl acid.
- Hemelic acid mesitylene acid, prenylic acid, toluic acid, cinnamic acid, salicylic acid, 2,3-dihydroxybenzoic acid, 2,4-dihydroxybenzoic acid, gentisic acid (2,5-dihydroxybenzoic acid), 2,6 -Dihydroxybenzoic acid, 3,5-dihydroxybenzoic acid, gallic acid (3,4,5-trihydroxybenzoic acid), 1,4-dihydroxy-2-naphthoic acid, 3,5-dihydroxy-2-naphthoic acid Naphthoic acid derivatives such as phenolphthalin; diphenolic acid and the like.
- Examples of the compound having a phenolic hydroxyl group include phenol, o-cresol, 2,6-xylenol, p-cresol, m-cresol, o-ethylphenol, 2,4-xylenol, 2,5 xylenol, m-ethyl.
- such a compound having flux activity is a curing agent having flux activity that is incorporated into a three-dimensional chemical structure formed by a reaction with a resin capable of crosslinking reaction such as an epoxy resin. Is preferred. Thereby, in addition to omitting the cleaning step after such a compound exhibits a flux activity, the connection reliability of the obtained semiconductor device can be further improved.
- the curing agent having this flux activity for example, at least two phenolic hydroxyl groups that can be added to a resin capable of crosslinking reaction such as an epoxy resin in one molecule, and a flux action on a metal oxide film, Examples thereof include compounds having at least one carboxyl group directly bonded to an aromatic group in one molecule.
- Benzoic acid derivatives such as acids (3,4,5-trihydroxybenzoic acid); 1,4-dihydroxy-2-naphthoic acid, 3,5-dihydroxy-2-naphthoic acid, 3,7-dihydroxy-2-naphthoic acid Naphthoic acid derivatives such as acids; phenolphthaline; and diphenolic acid.
- These compounds having flux activity may be used alone or in combination of two or more.
- the content of the compound having the flux activity is not particularly limited, but is preferably 1% by weight or more and 30% by weight or less of the entire resin composition, and particularly 5% by weight or more and 25% by weight or less. Is preferred. If the content is less than the lower limit, the effect of flux activity may be insufficient, and if the content exceeds the upper limit, a resin capable of crosslinking reaction and a compound having unreacted flux activity may remain, This may cause migration in a cured product of the adhesive layer 2 (for example, a first adhesive layer 122 described later). Moreover, since the oxide film on the surface of the electrical connection portion (copper foil) can be reduced and removed when the content is within the above range, a good bond having high strength can be obtained between the electrical connection portions.
- the resin composition is not particularly limited, but may contain a curing agent.
- the curing agent include phenols, amines, and thiols.
- an epoxy resin is used as a resin capable of crosslinking reaction, good reactivity with the epoxy resin, small dimensional change of the adhesive layer 2 at the time of curing, and appropriate physical properties (for example, Phenols are preferably used in that heat resistance, moisture resistance, etc. are obtained.
- the phenols are not particularly limited, but in view of the physical properties of the cured product of the adhesive layer 2 (for example, the first adhesive layer 122 described later), bifunctional or higher functionality is preferable.
- bifunctional or higher functionality is preferable.
- phenol novolacs and cresol novolacs can be suitably used.
- the content is not particularly limited, but from the viewpoint of surely curing the crosslinkable resin, it is preferably 5% by weight or more of the total resin composition, 10 weight% or more is preferable. Moreover, when the epoxy resin and unreacted phenol novolac remain, it causes migration in the cured product of the adhesive layer 2. Therefore, in order not to leave these as a residue, the content is preferably 30% by weight or less, and particularly preferably 25% by weight or less, based on the entire resin composition.
- the content of the phenol novolac resin may be defined by an equivalent ratio with respect to the epoxy resin.
- the equivalent ratio of phenol novolac to epoxy resin is preferably 0.5 or more and 1.2 or less, particularly preferably 0.6 or more and 1.1 or less, and most preferably 0.7 or more and 0.98 or less. Is preferred.
- Examples of other curing agents include imidazole compounds and phosphorus compounds. Although it does not specifically limit as said imidazole compound, It is preferable to use the imidazole compound whose melting
- Examples of the imidazole compound having a melting point of 150 ° C. or higher include 2-phenylhydroxyimidazole, 2-phenyl-4-methylhydroxyimidazole, 2-phenyl-4-methylimidazole and the like.
- fusing point of an imidazole compound For example, according to the adhesion temperature of the adhesive bond layer 2, it can set suitably.
- the content is not particularly limited, but is preferably 0.005% by weight or more and 10% by weight or less of the entire resin composition, particularly 0.01% by weight or more, 5% by weight or less is preferable.
- crosslinked can be exhibited more effectively, and the sclerosis
- the melt viscosity of the adhesive layer 2 is not too high at the temperature at which the solder melts, and a good solder joint structure can be obtained.
- the preservability of the adhesive layer 2 can be further improved.
- Examples of the phosphorus compound include triphenylphosphine; a molecular compound of a tetra-substituted phosphonium and a polyfunctional phenol compound; a molecular compound of a tetra-substituted phosphonium, a proton donor, and a trialkoxysilane compound.
- the tetra-substituted phosphonium and the polyfunctional phenol compound which are excellent in the fast curing property of the adhesive layer 2, the corrosion resistance to the electrical connection portion (aluminum pad) of the semiconductor element, and the storage stability of the adhesive layer 2,
- a molecular compound and a molecular compound of a tetra-substituted phosphonium, a proton donor, and a trialkoxysilane compound are particularly preferable.
- the resin composition is not particularly limited, but may include a film-forming resin different from the resin capable of crosslinking reaction.
- the film-forming resin include phenoxy resin, polyester resin, polyurethane resin, polyimide resin, siloxane-modified polyimide resin, polybutadiene, polypropylene, styrene-butadiene-styrene copolymer, styrene-ethylene-butylene-styrene copolymer, and the like.
- Styrene copolymer polyacetal resin, polyvinyl butyral resin, polyvinyl acetal resin, butyl rubber, chloroprene rubber, polyamide resin, acrylonitrile-butadiene copolymer, acrylonitrile-butadiene-acrylic acid copolymer, acrylonitrile-butadiene-styrene copolymer Coalescence, polyvinyl acetate, nylon, acrylic rubber, etc. can be used. These may be used alone or in combination of two or more.
- a phenoxy resin having a number average molecular weight of 5,000 or more and 15,000 or less is preferable.
- the fluidity of the adhesive layer 2 before curing can be suppressed, and the interlayer thickness can be made uniform.
- the skeleton of the phenoxy resin include, but are not limited to, bisphenol A type, bisphenol F type, and biphenyl skeleton type.
- a phenoxy resin having a saturated water absorption rate of 1% or less is preferable because the occurrence of foaming or peeling of the adhesive layer 2 can be suppressed even at high temperatures during bonding or solder mounting.
- a resin having a nitrile group, an epoxy group, a hydroxyl group, or a carboxyl group may be used for the purpose of improving adhesiveness or compatibility with other resins.
- acrylic rubber can be used as the film-forming resin.
- the film formation stability when the film-like adhesive layer 2 is produced can be improved.
- the elastic modulus of the cured product of the adhesive layer 2 can be reduced and the residual stress between the adherend and the cured product of the adhesive layer 2 can be reduced, the coverage of the cured product of the adhesive layer 2 can be reduced. Adhesiveness to the adhesive can be improved.
- the acrylic rubber is preferably a (meth) acrylic acid ester copolymer containing a monomer unit having an epoxy group, a hydroxyl group, a carboxyl group, a nitrile group or the like.
- Examples of monomers used in such a (meth) acrylic acid ester copolymer include glycidyl (meth) acrylate having a glycidyl group, (meth) acrylate having a hydroxyl group, (meth) acrylate having a carboxyl group, and a nitrile group. Examples include (meth) acrylonitrile.
- a (meth) acrylic acid ester copolymer containing a monomer unit having a glycidyl group or a carboxyl group is particularly preferable to use.
- the content of the monomer unit having a carboxyl group in the copolymer is further improved from the viewpoint of improving the adhesion to an adherend.
- it is 0.5% by weight or more, preferably 1% by weight or more of the entire (meth) acrylic acid ester copolymer.
- the content of the monomer unit having a carboxyl group is, for example, 10% by weight or less, preferably 5% by weight, based on the total (meth) acrylate copolymer, from the viewpoint of further improving the storage stability of the adhesive layer 2. It is as follows.
- the weight average molecular weight of the (meth) acrylic acid ester copolymer is not particularly limited, but is preferably 1,000 or more and 1,000,000 or less, particularly preferably 3,000 or more and 900,000 or less. By setting it as the said range, the film formability of the resin composition which comprises the adhesive bond layer 2 can further be improved, and it becomes possible to ensure the fluidity
- the weight average molecular weight of the (meth) acrylic acid ester copolymer can be measured, for example, by gel permeation chromatography (GPC).
- GPC gel permeation chromatography
- Examples of measurement conditions include, for example, high-speed GPC SC- manufactured by Tosoh Corporation.
- TSK-GEL GMHXL-L, temperature 40 ° C., and solvent tetrahydrofuran can be used as the column.
- the glass transition temperature of the (meth) acrylate copolymer is, for example, 0 ° C. or higher, preferably 5 ° C. or higher, from the viewpoint of further improving workability by suppressing the adhesiveness of the adhesive layer 2 from becoming too strong. It is. Further, the glass transition temperature of the (meth) acrylic acid ester copolymer is, for example, 30 ° C. or less, preferably 20 ° C. or less, from the viewpoint of further improving the adhesiveness at a low temperature.
- the glass transition temperature of the (meth) acrylic acid ester copolymer is increased from ⁇ 65 ° C. at a constant load (10 mN) using, for example, a thermomechanical characteristic analyzer (manufactured by Seiko Instruments Inc., TMA / SS6100). It can be measured from the inflection point when pulled while increasing the temperature at a temperature rate of 5 ° C./min.
- the content of the film-forming resin is not particularly limited, but is preferably 5% by weight or more and 50% by weight or less of the entire resin composition.
- the film-forming resin is blended within the above range, a decrease in film formability of the resin composition constituting the adhesive layer 2 is suppressed, and an increase in the elastic modulus of the cured product of the adhesive layer 2 is suppressed. Therefore, the adhesiveness with the adherend can be further improved. Moreover, by setting it as the said range, the increase in the melt viscosity of the adhesive bond layer 2 is suppressed.
- the resin composition preferably further contains an inorganic filler.
- inorganic fillers include silicates such as talc, fired clay, unfired clay, mica, and glass, titanium oxide, alumina, fused silica (fused spherical silica, fused crushed silica), and powders such as crystalline silica.
- Oxides such as calcium carbonate, magnesium carbonate, hydrotalcite, hydroxides such as aluminum hydroxide, magnesium hydroxide, calcium hydroxide, sulfates such as barium sulfate, calcium sulfate, calcium sulfite, or sulfite Examples thereof include salts, borates such as zinc borate, barium metaborate, aluminum borate, calcium borate, and sodium borate, and nitrides such as aluminum nitride, boron nitride, and silicon nitride. These inorganic fillers may be used alone or in combination. Among these, silica powders such as fused silica and crystalline silica are preferable, and spherical fused silica is particularly preferable.
- the heat resistance, moisture resistance, strength, etc. of the cured product of the resin composition can be improved, and the peelability of the adhesive layer 2 from the sheet substrate 1 is improved. be able to.
- the shape of the inorganic filler is not particularly limited, but it is preferably a true sphere, whereby a resin composition suitable as the adhesive layer 2 having no anisotropy can be provided.
- the average particle diameter of the inorganic filler is not particularly limited, but is preferably 0.5 ⁇ m or less, particularly preferably 0.01 ⁇ m or more and 0.5 ⁇ m or less, and most preferably 0.01 ⁇ m or more and 0.3 ⁇ m or less. If the average particle size is too small, the inorganic filler tends to aggregate, resulting in a decrease in strength. On the other hand, if the average particle size is too large, the transparency of the adhesive layer 2 is decreased, and the position of the surface of the semiconductor element is reduced. It may be difficult to recognize the alignment mark, and it may be difficult to align the semiconductor element and the substrate.
- the content of the inorganic filler is not particularly limited, but is preferably 10% by weight or more and 60% by weight or less, and particularly preferably 20% by weight or more and 50% by weight or less of the entire resin composition. If the content of the inorganic filler is less than the lower limit, the effect of improving the heat resistance, moisture resistance, strength, etc. of the cured product of the adhesive layer 2 may be reduced, while if the upper limit is exceeded. In some cases, the transparency of the adhesive layer 2 may decrease, or the tackiness of the adhesive layer 2 may decrease.
- the resin composition may further contain a silane coupling agent.
- a silane coupling agent By setting it as the structure containing a silane coupling agent, the adhesiveness to the to-be-adhered thing of the adhesive bond layer 2 can further be improved.
- the silane coupling agent include an epoxy silane coupling agent and an aromatic-containing aminosilane coupling agent. These may be used alone or in combination of two or more. Although content of a silane coupling agent is not specifically limited, It is preferable to set it as 0.01 to 5 weight% of the said whole resin composition.
- the resin composition may contain components other than those described above.
- various additives are added to improve various properties such as compatibility between resins in the resin composition, stability of the resin composition and the adhesive layer 2, and workability during film formation of the resin composition. You may add suitably.
- the sheet base material 1 is composed of a support base material and an adhesive layer, and the support base material includes, for example, a resin film excellent in heat resistance and chemical resistance, and a resin constituting the resin film.
- a crosslinked film subjected to a crosslinking treatment, and a film obtained by applying a silicone resin or the like to the surface of the resin film and performing a peeling treatment can be used.
- the resin constituting the resin film is not particularly limited.
- polyolefin such as polyester, polyethylene, polypropylene, polybutene, polybutadiene, vinyl chloride, ethylene-methacrylic acid copolymer, ethylene vinyl acetate copolymer, Examples thereof include polyester, polyimide, polyethylene terephthalate, polyamide, and polyurethane.
- the thickness of the sheet substrate 1 is not particularly limited, but is preferably 3 ⁇ m or more and 500 ⁇ m or less, more preferably 3 ⁇ m or more and 100 ⁇ m or less, and particularly preferably 10 ⁇ m or more and 75 ⁇ m or less.
- the thickness of the adhesive layer 2 is not particularly limited, but is preferably 3 ⁇ m or more and 100 ⁇ m or less, and particularly preferably 10 ⁇ m or more and 75 ⁇ m or less.
- the thickness of the sheet base material 1 and the adhesive layer 2 is less than the lower limit value, the effect as the semiconductor film 10 may be reduced. May decrease.
- the adhesive layer 2 is obtained by mixing a crosslinkable resin, a compound having a flux activity, and the like, applying the mixture on a release substrate 21 such as a polyester sheet, and drying at a predetermined temperature. By half-cutting only the adhesive layer 2 side of the adhesive layer 2 formed on the peeling substrate 21, the adhesive layer 2 can be formed into substantially the same shape as the semiconductor wafer, for example, a circular shape. In this case, an adhesive film composed of the adhesive layer 2 and the release substrate 21 is obtained.
- the adhesive layer 2 includes a resin and flux capable of crosslinking reaction.
- a compound having activity, etc. it is obtained by mixing a compound having activity, etc., applying it on a release film such as a polyethylene terephthalate film, and drying at a predetermined temperature. Further, after laminating a release substrate 21 such as a polyester sheet on the adhesive layer 2 side, only the release film and the adhesive layer 2 side are half-cut to thereby remove the release film and the adhesive layer 2 from the semiconductor wafer.
- the shape can be substantially the same, for example, a circular shape. In this case, an adhesive film composed of the release film, the adhesive layer 2 and the release substrate 21 is obtained.
- the film 10 for semiconductors with the peeling base material 21 comprised by the adhesive layer of the material 1, the (release film) adhesive layer 2, and the peeling base material 21 can be obtained (refer FIG. 2).
- the minimum melt viscosity is not particularly limited, but is preferably 10 Pa ⁇ s or more and 10,000 Pa ⁇ s or less, particularly preferably 100 Pa ⁇ s or more and 3,000 Pa ⁇ s or less, most preferably It is preferably 300 Pa ⁇ s or more and 1,500 Pa ⁇ s or less.
- melt viscosity By setting the melt viscosity to the lower limit value or more, it is possible to suppress a decrease in adhesion reliability due to the adhesive layer 2 protruding from the adherend during heating, and it is possible to suppress contamination of peripheral members due to the protrusion. Furthermore, defects such as generation of bubbles in the adhesive layer 2, for example, generation of unfilled portions of the resin composition between the semiconductor element and the substrate can be prevented. Furthermore, it is possible to prevent the problem that the solder is excessively spread and short-circuits between adjacent electrical connection portions (electrodes) on the substrate side.
- the temperature at which the adhesive layer 2 reaches the minimum melt viscosity is not particularly limited, but is preferably 120 to 180 ° C, and particularly preferably 140 to 170 ° C. This is because if the adhesive layer 2 exhibits the minimum melt viscosity in the temperature range, it becomes easy to mount the semiconductor element on a substrate (circuit substrate) or the like.
- the melt viscosity of the adhesive layer 2 is obtained, for example, by the following measuring method.
- the adhesive layer 2 having a thickness of 100 ⁇ m can be measured with a viscoelasticity measuring device (Rheo Stress RS-10 HAAKE Co., Ltd.) at a heating rate of 10 ° C./min, a frequency of 0.1 Hz, and constant strain-stress detection.
- a viscoelasticity measuring device Robal Stress RS-10 HAAKE Co., Ltd.
- the adhesive layer 2 is not particularly limited, but preferably has transparency that allows the surface of the semiconductor element to be recognized when adhered to the surface of the semiconductor element. Thereby, the position alignment when joining a semiconductor element and a board
- the release substrate 21 is removed from the semiconductor film 10 with the release substrate 21 to prepare the semiconductor film 10.
- the adhesive layer 2 (and the release film) is formed in substantially the same shape (circular in this embodiment) and size as the semiconductor wafer.
- the semiconductor wafer 3 and the semiconductor film 10 are laminated so that the functional surface (one surface) 31 of the semiconductor wafer 3 and the adhesive layer 2 are in contact ( Adhesion process).
- Adhesion process it is preferable that solder bumps (projection electrodes) are formed on the functional surface 31 in advance.
- the semiconductor device can be easily manufactured by an operation of mounting the semiconductor wafer on a substrate after the semiconductor wafer is separated.
- the upper surface (upper side in FIG. 4) of the sheet substrate 1 is fixed to the polishing stage 4 of the polishing apparatus.
- the polishing apparatus is not particularly limited, and a commercially available apparatus can be used.
- the polishing apparatus is operated to polish (back grind) the surface (the other surface) opposite to the functional surface 31 of the semiconductor wafer 3 (polishing step).
- This polishing step may be performed as necessary and may be omitted.
- the thickness of the semiconductor wafer 3 after back grinding is not particularly limited, but is preferably about 30 to 600 ⁇ m.
- the film 10 for semiconductors of this invention is a resin composition in which the adhesive bond layer 2 contains the compound which has a flux activity, it is possible to laminate directly on the functional surface 31 of the semiconductor wafer 3.
- FIG. 1 the film 10 for semiconductors of this invention is a resin composition in which the adhesive bond layer 2 contains the compound which has a flux activity,
- the semiconductor wafer 3 after back grinding is placed on the dicer table 5 so that the sheet base material 1 is in contact with the upper surface of the dicer table 5 (upper side in FIG. 5).
- the wafer ring 6 is installed around the semiconductor wafer 3 to fix the semiconductor wafer 3.
- the semiconductor wafer 3 and the adhesive layer 2 are cut with the blade 7, and the semiconductor wafer 3 is separated into individual pieces to obtain semiconductor elements having the adhesive layer 2 (individualization step).
- the semiconductor film 10 has a buffering action, and prevents a semiconductor element from being cracked or chipped when the semiconductor wafer 3 is cut.
- the semiconductor wafer 3 and the wafer ring 6 may be attached in advance to the semiconductor film 10 and then placed on the dicer table 5.
- the semiconductor film 10 is stretched with an expanding device, the semiconductor elements having the adhesive layer 2 separated into pieces are opened at regular intervals, and then picked up (pickup process) and mounted on a substrate (mounting) Process). Then, the adhesive layer 2 is heated and cured to obtain a semiconductor device in which the semiconductor element is stacked on the substrate.
- the semiconductor film 10 of the present invention has a sheet coating 1 that can have a back grind tape function and a dicing tape function, and the adhesive layer 2 has flux activity. Can be omitted. Therefore, the flux cleaning process is unnecessary, the productivity is excellent, and the workability when processing the semiconductor wafer 3 can be improved.
- a method for manufacturing a semiconductor device and another embodiment of the semiconductor device will be described.
- FIG. 6 is a sectional view showing an example (another embodiment) of the semiconductor device of the present invention.
- the semiconductor device 100 includes a substrate 110, a first semiconductor element (another semiconductor element) 101 mounted on the upper side (the upper side in FIG. 6) of the substrate 110, and the first semiconductor element 101. And a second semiconductor element 102 mounted on the upper side (upper side in FIG. 6).
- the substrate 110 and the first semiconductor element 101 constitute a structure on which the second semiconductor element 102 is mounted.
- a circuit pattern (not shown) is formed on the upper surface of the substrate 110, and electrode pads (electrical connection portions) are arranged.
- the first semiconductor element 101 and the substrate 110 are electrically connected via solder bumps (projection electrodes) 111. Between the 1st semiconductor element 101 and the board
- a second adhesive layer (another adhesive layer) 112 is disposed.
- the first semiconductor element 101 is formed with a conductor portion 113 penetrating in the thickness direction, and an electrical signal can be exchanged between the functional surface 114 and the back surface of the first semiconductor element 101. It has become. Thereby, it is not necessary to use a bonding wire, and the semiconductor device 100 can be made thin. Furthermore, since the transmission distance of the electric signal can be shortened compared with the case where the bonding wire is used, the response speed can be improved.
- the first semiconductor element 101 and the second semiconductor element 102 are also electrically connected via solder bumps (projection electrodes) 121. Between the first semiconductor element 101 and the second semiconductor element 102, a cured product of a resin composition containing a resin capable of crosslinking reaction and a compound having flux activity so as to protect the periphery of the solder bump 121 (joint portion)
- the 1st contact bonding layer 122 comprised by is arrange
- the second semiconductor element 102 is formed with a conductor portion 123 penetrating in the thickness direction, and an electric signal can be exchanged between the functional surface 124 and the back surface of the second semiconductor element 2. ing. Thereby, it is not necessary to use a bonding wire, and the semiconductor device 100 can be made thin. Furthermore, since the transmission distance of the electric signal can be shortened compared with the case where the bonding wire is used, the response speed can be improved.
- a ceramic substrate or an organic substrate can be used.
- an alumina substrate, an aluminum nitride substrate, or the like can be used.
- an organic substrate a polyimide film substrate using a polyimide film as a substrate, an FR-4 substrate in which a glass cloth is impregnated with an epoxy resin, a BT substrate in which a bismaleimide-triazine resin is impregnated, or the like can be used.
- the first semiconductor element 101 for example, a memory, a logic, a processor or the like is used, and a size of about 1 to 20 mm square can be preferably used.
- the size of the solder bump (electric connection part) 111 that connects the first semiconductor element 101 and the substrate 110 is not particularly limited, but is preferably 10 to 600 ⁇ m, and more preferably 30 to 200 ⁇ m.
- the resin composition of the second adhesive layer 112 composed of a cured resin composition including a resin capable of crosslinking reaction and protecting the periphery of the solder bump 111 and a compound having flux activity
- the above-mentioned semiconductor film The same resin composition as that constituting the 10 adhesive layers 2 can be used.
- a so-called underfill material can be used as the second adhesive layer 112 that protects the periphery of the solder bump 111.
- a so-called underfill material can be used.
- An added liquid underfill material can be obtained.
- this underfill material By applying this underfill material to one side or a plurality of surfaces of the first semiconductor element 101, it is allowed to flow into the gap between the substrate 110 and the first semiconductor element 101 using the capillary phenomenon, and then cured, and then cured. Form an object to protect the electrical connection (electrode).
- the second semiconductor element 102 for example, a memory, a logic, a processor, or the like is used, and a size approximately the same size as the first semiconductor element 101 and about 1 to 20 mm square can be preferably used.
- the size of the solder bump 121 connecting the second semiconductor element 102 and the first semiconductor element 101 is not particularly limited, but is preferably 10 to 300 ⁇ m, and particularly preferably 20 to 100 ⁇ m.
- the resin composition of the first adhesive layer 122 composed of a cured resin composition containing a resin capable of crosslinking reaction and protecting the periphery of the solder bump 121 and a compound having flux activity
- the above-mentioned semiconductor film The same resin composition as that constituting the 10 adhesive layers 2 can be used.
- the first adhesive layer 122 is composed of a cured product of the resin composition as described above. As a result, the solder bumps (electrodes) 121 can be protected and the connection reliability of the semiconductor device 100 can be improved.
- FIG. 7 is a schematic view showing an example (another embodiment) of a method for manufacturing a semiconductor device of the present invention.
- a laminate comprising an adhesive layer 2 and a sheet substrate 1 composed of a resin composition containing a crosslinkable resin and a compound having flux activity, that is, a semiconductor film similar to the semiconductor film 10 described above. 10 'is manufactured.
- film 10 'for semiconductors of this embodiment is provided with sheet
- a resin composition containing a compound capable of crosslinking reaction and a compound having flux activity on a release substrate 21 ′ is applied and dried to obtain the adhesive layer 2.
- the adhesive layer 2 can be formed in substantially the same shape as the semiconductor wafer, for example, a circular shape. In this case, an adhesive film composed of the adhesive layer 2 and the release substrate 21 ′ is obtained.
- the adhesive film composed of the (release film) adhesive layer 2 and the release substrate 21 ′ and the sheet substrate 1 ′ composed of the support substrate 9 and the pressure-sensitive adhesive layer 8 are bonded together.
- the film is laminated with a laminator or the like so that the adhesive layer 2 or release film of the film and the pressure-sensitive adhesive layer 8 of the sheet substrate 1 ′ are in contact with each other to obtain a semiconductor film 10 ′ with a release substrate 21 ′.
- peeling base 21 ' is peeled from this semiconductor film 10' with peeling base 21 ', and adhesive layer 2 and the some penetrated to thickness direction Lamination is performed such that one surface (the lower surface in FIG. 7C) of the semiconductor wafer 3 ′ having the conductor portion 123 comes into contact (bonding step).
- the support substrate 9 of the sheet substrate 1 ′ is installed on the dicer table (not shown) so as to contact the upper surface of the dicer table.
- a wafer ring is installed around the semiconductor wafer 3 'to fix the semiconductor wafer 3'.
- the semiconductor wafer 3 ′ and the adhesive layer 2 are cut with a blade, the semiconductor wafer 3 ′ is separated into pieces, the second semiconductor having the adhesive layer 2 and the conductor portion 123 penetrating in the thickness direction. Element 102 is obtained (individualization step).
- the semiconductor film 10 ′ is stretched with an expanding device, the second semiconductor elements 102 having the adhesive layer 2 separated into pieces are opened at a constant interval, and then picked up (pickup process).
- the substrate 110 on which the semiconductor element 101 is mounted in advance is mounted on the first semiconductor element 101 (mounting process).
- the adhesive layer 2 is heated and cured to obtain the semiconductor device 100 in which the two semiconductor elements 101 and 102 are stacked on the substrate 110 as the first adhesive layer 122.
- the adhesive layer 2 having the flux activity as described above is used, a flux process is not required when soldering the first and second semiconductor elements 101 and 102 together. It also has excellent reflow resistance.
- the case where two semiconductor elements are stacked has been described. However, a plurality of three or four semiconductor elements may be stacked. Further, the first semiconductor element 101 may be mounted on the substrate in the same manner as the second semiconductor element 102.
- Example A1 Manufacture of adhesive film Epoxy resin (NC6000 (epoxy equivalent 200 g / eq, manufactured by Nippon Kayaku Co., Ltd.)) 47.00% by weight as a resin capable of crosslinking reaction, and acrylate copolymer (butyl acrylate) as a film-forming resin -Ethyl acrylate-Acrylonitrile-Acrylic acid-Hydroxyethyl acrylate copolymer, manufactured by Nagase ChemteX Corporation, SG-708-6, weight average molecular weight: 500,000) 19.51% by weight and acrylic resin (acrylic Acid-styrene copolymer, weight average molecular weight: 5,500, UC-3900, manufactured by Toagosei Co., Ltd.) 9.75% by weight, solid phenol resin (PR-53647, hydroxyl group equivalent 104 g / OH group) as a curing agent, Sumitomo Bakelite
- the resin varnish After applying this resin varnish on a release film made of a polyethylene terephthalate film (thickness 15 ⁇ m) using a comma coater, the resin varnish is dried at 90 ° C. for 5 minutes to form an adhesive layer having a thickness of 40 ⁇ m. Formed on top. Thereafter, a release substrate (cover film) made of a polyester sheet having a thickness of 38 ⁇ m was further laminated on the adhesive layer side to obtain an adhesive film composed of the release substrate, the adhesive layer, and the release film.
- Adhesive Film Cleartech CT-H717 manufactured by Kuraray Co., Ltd.
- a copolymer having a weight average molecular weight of 500,000 obtained by copolymerizing 50 parts by weight of 2-ethylhexyl acrylate, 10 parts by weight of butyl acrylate, 37 parts by weight of vinyl acetate, and 3 parts by weight of 2-hydroxyethyl methacrylate.
- the polymer was coated on a release substrate (cover film) made of a polyester film having a thickness of 38 ⁇ m after the release treatment so that the thickness after drying was 10 ⁇ m, and dried at 80 ° C. for 5 minutes. A layer was obtained. Thereafter, this pressure-sensitive adhesive layer is laminated on the corona-treated surface of the above-mentioned support base material, and a pressure-sensitive adhesive film (peeling) composed of a sheet base material composed of the support base material and the pressure-sensitive adhesive layer and a release base material (cover film) A sheet substrate with a substrate (cover film) was obtained.
- the semiconductor wafer is placed so that the supporting base material of the sheet base material 1 and the upper surface of the dicer table 5 are in contact with each other, and a spindle rotation speed of 30 is used using a dicing saw.
- the semiconductor wafer and the adhesive layer were diced (cut) into a size of 5 mm ⁇ 5 mm square at 1,000 rpm and a cutting speed of 50 mm / sec.
- the semiconductor element 60 ⁇ m ⁇ , Sn3Ag0.5Cu bump, pitch, which is pushed up from the back surface of the film for semiconductor, peeled between the adhesive layer and the release film, and bonded with the adhesive layer (adhesive film).
- the semiconductor element was aligned with a BT (bismaleimide-triazine) resin substrate (0.8 mmt) coated with a solder resist (manufactured by Taiyo Ink Manufacturing Co., Ltd .: PSR4000 AUS308) using a flip chip bonder, and then 250 A flip chip package was obtained by pressure bonding at 10 ° C. for 10 seconds. It was post cured at 180 ° C. for 1 hour. The transmittance of the adhesive layer was 97%.
- Example A2 An acrylic ester copolymer (acrylic acid) was used without using an acrylic resin (acrylic acid-styrene copolymer, weight average molecular weight: 5,500, UC-3900, manufactured by Toa Gosei Co., Ltd.) as a film-forming resin.
- the transmittance of the adhesive layer was 97%.
- a resin capable of crosslinking reaction is an epoxy resin (NC6000 (epoxy equivalent 200 g / eq, manufactured by Nippon Kayaku Co., Ltd.)) 37.60% by weight, an acrylate copolymer (butyl acrylate-acrylic acid) as a film-forming resin.
- NC6000 epoxy equivalent 200 g / eq, manufactured by Nippon Kayaku Co., Ltd.
- acrylate copolymer butyl acrylate-acrylic acid
- Ethyl-acrylonitrile-acrylic acid-hydroxyethyl acrylate copolymer manufactured by Nagase ChemteX Corporation, SG-708-6, weight average molecular weight: 500,000) and 15.60% by weight acrylic resin (acrylic acid-styrene) Copolymer, weight average molecular weight: 5,500, UC-3900, manufactured by Toagosei Co., Ltd.) 7.80% by weight, solid phenol resin (PR-53647, hydroxyl group equivalent 104 g / OH group, Sumitomo Bakelite (as a curing agent) 8) 21% by weight, imidazole compound (2P4MHZ, Shikoku Chemicals) as a curing accelerator Co., Ltd.) 0.07% by weight, phenolphthaline 10.30% by weight as a flux compound, propyltrimethoxysilane (KBM303, manufactured by Shin-Etsu Chemical Co., Ltd.) 0.42% by weight as methyl ethyl
- Example A4 An epoxy resin (epoxy equivalent 180 g / eq, Epicron 840S, manufactured by Dainippon Ink & Chemicals, Inc.) 50.00% by weight, a phenoxy resin (YL-) as a film-forming resin.
- Example A5 In the production of a semiconductor film, the same procedure as in Example A1 was conducted except that a release film was not used and a semiconductor film was obtained as follows.
- the above-mentioned resin varnish was applied on a release substrate (cover film) made of a polyester sheet (thickness 38 ⁇ m) using a comma coater, and then dried at 90 ° C. for 5 minutes to form an adhesive layer having a thickness of 40 ⁇ m.
- a release substrate (cover film) was formed on a release substrate (cover film) to obtain an adhesive film composed of the release substrate (cover film) and an adhesive layer.
- the release substrate After half-cutting the adhesive layer side of the above-mentioned adhesive film so as to leave a part adhered to the semiconductor wafer, the release substrate (cover film) is peeled off from the adhesive layer of the above-mentioned adhesive film, and the adhesive film The adhesive layer and the pressure-sensitive adhesive layer of the pressure-sensitive adhesive film were attached so as to contact each other. Thereby, the film for a semiconductor with a peeling base material (cover film) in which the supporting base material of the sheet base material, the adhesive layer of the sheet base material, the adhesive layer and the peeling base material (cover film) are laminated in this order. Obtained. The transmittance of the adhesive layer was 97%.
- Example 1 Example 1 except that phenolphthaline, which is a flux active substance, was not used in Example 1 and the solid phenolic resin (PR-53647, hydroxyl group equivalent 104 g / OH group, manufactured by Sumitomo Bakelite Co., Ltd.) was 23.14% by weight. It carried out similarly to A1. The transmittance of the adhesive layer was 96%.
- a back grind tape (manufactured by Mitsui Chemicals, product number Icross tape) was bonded to a semiconductor wafer. And after setting up so that a back grinding tape and the polishing stage of a back grinding apparatus may touch, the wafer thickness was ground from 725 micrometers to 100 micrometers by the back grinding apparatus. Next, the back grind tape is peeled from the semiconductor wafer, and then replaced with a dying sheet (manufactured by Sumitomo Bakelite, product number Sumilite FSL) so that the dicing sheet and the upper surface of the dicer table are in contact with each other.
- a dying sheet manufactured by Sumitomo Bakelite, product number Sumilite FSL
- a spindle element of 30,000 rpm, a cutting speed of 50 mm / sec and a 5 mm ⁇ 5 mm square semiconductor element 60 ⁇ m ⁇ , Sn3Ag0.5Cu bump, pitch 200 ⁇ m, bump number 225, with PI protective film: Hitachi VLSI Dicing (cutting) into the size of the company.
- a flip chip bonder is used on a BT (bismaleimide-triazine) resin substrate (0.8 mmt) coated with a solder resist (manufactured by Taiyo Ink Manufacturing Co., Ltd .: PSR4000 AUS308) by applying a flux to the semiconductor element functional surface.
- the film was pressure-bonded at 250 ° C. for 10 seconds to obtain a flip chip package.
- excess flux was cleaned using a flux cleaning solution.
- a liquid sealing resin was poured between the semiconductor element and the substrate and cured at 150 ° C. for 2 hours to obtain a semiconductor device.
- connection reliability was evaluated based on whether or not the obtained semiconductor device was conductive after the heat cycle test. Specifically, the connection resistance between the semiconductor element and the substrate was measured with a digital multi-digital meter. The measurement was performed both after manufacturing the semiconductor device and after 1,000 cycles of a temperature cycle of ⁇ 65 ° C. for 1 hour and 150 ° C. for 1 hour. Each code is as follows. A: Conductivity was obtained with 20/20 semiconductor devices. ⁇ : Conductivity was obtained with 18 to 19/20 semiconductor devices. ⁇ : Conductivity was obtained with 16 to 17/20 semiconductor devices. X: Conductivity was obtained with 16 or less / 20 semiconductor devices.
- Example B1 Production of Adhesive Film First, a resin varnish was obtained in the same manner as in Example A1. Next, this resin varnish was applied on a release film made of a polyethylene terephthalate film (thickness 38 ⁇ m) using a comma coater, and then dried at 90 ° C. for 5 minutes to separate the adhesive layer having a thickness of 35 ⁇ m. An adhesive film formed on the mold film and composed of an adhesive layer and a release film was obtained.
- the second semiconductor element (number of electrodes 480, post diameter 30 ⁇ m) pushed up from the back surface of the adhesive layer, peeled between the adhesive layer and the adhesive layer of the semiconductor film, and bonded with the adhesive layer.
- a height of 20 ⁇ m, a pitch of 50 ⁇ m, and a tin silver solder height of 10 ⁇ m was obtained.
- a first semiconductor element (size 7 mm ⁇ 7 mm, thickness 100 ⁇ m, number of electrodes 480, post diameter 30 ⁇ m / height 20 ⁇ m, pitch 50 ⁇ m, tin silver solder height 10 ⁇ m) is a solder resist (Taiyo Ink Manufacturing Co., Ltd.) Manufactured by: PSR4000 AUS308) coated BT (bismaleimide-triazine) resin substrate (0.8 mmt) bonded to the second semiconductor element having the above-mentioned adhesive layer, adhesive layer, (1) After positioning using a flip chip bonder so as to be in contact with a semiconductor element, it was mounted by pressure bonding at 250 ° C. for 10 seconds. Then, the adhesive layer was cured by heating at 180 ° C. for 60 minutes to obtain an adhesive layer, thereby obtaining a semiconductor device in which two semiconductor elements were laminated.
- Example B2 An acrylic ester copolymer (acrylic acid) was used without using an acrylic resin (acrylic acid-styrene copolymer, weight average molecular weight: 5,500, UC-3900, manufactured by Toa Gosei Co., Ltd.) as a film-forming resin.
- An acrylic resin (acrylic acid-styrene copolymer, weight average molecular weight: 5,500, UC-3900, manufactured by Toa Gosei Co., Ltd.) as a film-forming resin.
- a butyl-ethyl acrylate-acrylonitrile-acrylic acid-hydroxyethyl acrylate copolymer, manufactured by Nagase ChemteX Corporation, SG-708-6, weight average molecular weight: 500,000), except for 29.26% by weight The same as in Example B1.
- a resin capable of crosslinking reaction is an epoxy resin (NC6000 (epoxy equivalent 200 g / eq, manufactured by Nippon Kayaku Co., Ltd.)) 37.60% by weight, an acrylate copolymer (butyl acrylate-acrylic acid) as a film-forming resin.
- NC6000 epoxy equivalent 200 g / eq, manufactured by Nippon Kayaku Co., Ltd.
- acrylate copolymer butyl acrylate-acrylic acid
- Ethyl-acrylonitrile-acrylic acid-hydroxyethyl acrylate copolymer manufactured by Nagase ChemteX Corporation, SG-708-6, weight average molecular weight: 500,000) and 15.60% by weight acrylic resin (acrylic acid-styrene) Copolymer, weight average molecular weight: 5,500, UC-3900, manufactured by Toagosei Co., Ltd.) 7.80% by weight, solid phenol resin (PR-53647, hydroxyl group equivalent 104 g / OH group, Sumitomo Bakelite (as a curing agent) 8) 21% by weight, imidazole compound (2P4MHZ, Shikoku Chemicals) as a curing accelerator Co., Ltd.) 0.07% by weight, phenolphthaline 10.30% by weight as a flux compound, propyltrimethoxysilane (KBM303, manufactured by Shin-Etsu Chemical Co., Ltd.) 0.42% by weight as methyl ethyl
- Example B4 The resin varnish was the same as Example 1 except that the following was used.
- a resin capable of crosslinking reaction is 62.5% by weight of an epoxy resin (epoxy equivalent 180 g / eq, Epicron 840S, manufactured by Dainippon Ink & Chemicals, Inc.), and a phenoxy resin (YL-6554, Japan Epoxy Resin) as a film-forming resin.
- solid phenolic resin PR-53647, hydroxyl group equivalent 104 g / OH group, manufactured by Sumitomo Bakelite Co., Ltd.
- phosphorus compound (curing accelerator) Tetraphenylphosphine / phenyltrimethoxysilane / 2,3-dihydroxynaphthalene molecular compound
- sebacic acid as a flux compound was dissolved in methyl ethyl ketone (MEK), and the solid content was 40%.
- MEK methyl ethyl ketone
- the semiconductor wafer was diced (cut) into a size of 7 mm ⁇ 7 mm square at a spindle rotation speed of 30,000 rpm and a cutting speed of 50 mm / sec using a dicing saw to obtain a first semiconductor element.
- a BT (bismaleimide-triazine) resin substrate (0) coated with a solder resist (manufactured by Taiyo Ink Manufacturing Co., Ltd .: PSR4000 AUS308) is applied to the back surface (opposite surface of the functional device surface) of the first semiconductor element. 8 mmt) using a flip chip bonder, and then subjected to pressure bonding at 250 ° C. for 10 seconds to obtain a flip chip package.
- a flux is applied to the back surface (opposite surface of the functional device surface) of the second semiconductor element, alignment is performed on the first semiconductor element using a flip chip bonder, and then crimped at 250 ° C. for 10 seconds to form a flip chip package. Got. Next, excess flux was cleaned using a flux cleaning solution. Thereafter, a liquid sealing resin (manufactured by Sumitomo Bakelite Co., product number CRP-4120B2) was poured between the first semiconductor element and the second semiconductor element, and cured at 150 ° C. for 2 hours to obtain a semiconductor device. .
- a liquid sealing resin manufactured by Sumitomo Bakelite Co., product number CRP-4120B2
- Connection reliability was evaluated based on whether or not the obtained semiconductor device was conductive after the heat cycle test. This was performed in the same manner as described above for connection reliability.
- Reflow resistance was evaluated by a scanning ultrasonic flaw detector (SAT) after performing moisture absorption treatment on the obtained semiconductor device at 85 ° C./85% RH / 168 hours, and performing IR reflow at 260 ° C. three times. .
- SAT scanning ultrasonic flaw detector
- Examples B1 to B4 were excellent in connection reliability, and it was suggested that the semiconductor element having a through electrode and another semiconductor element can be suitably bonded. Further, it was shown that Examples B1 to B4 are excellent in productivity of the semiconductor device. Further, in the method of pouring the liquid sealing resin between the semiconductor element and the substrate as in Comparative Example B1, it is difficult to pour the liquid sealing resin between the narrow pitch electrodes (wirings) as described above. It has been shown that the filling property becomes insufficient and the connection reliability of the semiconductor device is lowered.
- cleaning process is unnecessary, it is excellent in productivity, and the film for semiconductors which can improve the workability
- cured material of the adhesive bond layer of the said film for semiconductors can be obtained.
- a semiconductor device in which a semiconductor element and a structure including a substrate are suitably bonded can be obtained. Therefore, it has industrial applicability.
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Abstract
Description
また、半導体素子を立体的に重ねたスタックドパッケージと呼ばれる方式も主流になってきている。複数の半導体素子を平面状でなく立体状に配置すると、パッケージを小さくできる。さらに、半導体素子同士の間でやり取りする情報を増やせることから、全体的な性能向上につながる。
半導体素子を立体的に積層する手法としては、半導体素子同士の間をワイヤー・ボンディングで接続するマルチ・チップ・パッケージ(MCP:Multi―Chip Package)という技術がある。
これに対し、貫通電極(TSV:Through Silicon Via)を用いる手法では、半導体素子に孔を開けて金属を満たし、半導体素子同士の間の接続を行う。この手法によれば、接続用のワイヤーが不要となるため、半導体素子同士の間隔を狭められるという利点がある。このため、当該手法が、今後、半導体素子を立体的に積層する手法として主流になっていくと考えられる。
なお、この貫通電極を用いる手法においても、接合部分の補強や信頼性向上等を目的として、半導体素子と回路基板との間隙を樹脂組成物で封止することが一般的である。
また、本発明の目的は、半導体素子と、基板を含む構造体とを生産性良く接合する半導体装置の製造方法を提供することにある。
また、本発明の目的は、上記半導体用フィルムの接着剤層の硬化物を有する半導体装置を提供することにある。
また、本発明の目的は、半導体素子と、基板を含む構造体とが好適に接合された半導体装置を提供するものである。
(1)シート基材と、該シート基材の一方の面側に設けられた接着剤層とを有する半導体用フィルムであって、
前記接着剤層が、架橋反応可能な樹脂およびフラックス活性を有する化合物を含む樹脂組成物で構成されていることを特徴とする半導体用フィルム。
(2)半導体素子の電極端子面と、前記半導体用フィルムの前記接着剤層とを接着させて用いるものである上記(1)に記載の半導体用フィルム。
(3)フリップチップ型の半導体素子の機能面と、前記半導体用フィルムの前記接着剤層とを接着させて用いるものである上記(1)に記載の半導体用フィルム。
(4) 前記半導体用フィルムの前記接着剤層を常温から10℃/分の昇温速度で溶融状態まで昇温したときに初期は溶融粘度が減少し、最低溶融粘度に到達した後、さらに上昇するような特性を有し、かつ前記最低溶融粘度が10Pa・s以上、10,000Pa・s以下である上記(3)に記載の半導体用フィルム。
(5) さらに、前記シート基材と前記接着剤層との間に、離型フィルムを有するものである上記(1)に記載の半導体用フィルム。
(6) 前記半導体用フィルムの前記接着剤層は、半導体素子の表面に接着された状態で、前記半導体素子の前記表面が認識可能な程度の透明性を有するものである上記(1)に記載の半導体用フィルム。
(7) 前記樹脂組成物が、さらにフィルム形成性樹脂を含むものである上記(1)に記載の半導体用フィルム。
(8) 前記樹脂組成物が、さらに硬化剤を含むものである上記(7)に記載の半導体用フィルム。
(9) 前記樹脂組成物が、さらに無機充填剤を含むものである上記(8)に記載の半導体用フィルム。
(10) 前記無機充填剤の平均粒子径が、0.5μm以下である上記(9)に記載の半導体用フィルム。
(11) 前記フラックス活性を有する化合物は、フラックス活性を有する硬化剤である上記(1)に記載の半導体用フィルム。
(12) 前記フラックス活性を有する化合物は、カルボキシル基およびフェノール性水酸基の少なくとも一方を有する化合物である上記(1)に記載の半導体用フィルム。
(13) 半導体素子と、基板および該基板の一方の面側に搭載された他の半導体素子を含む構造体の他の半導体素子とを接着するのに使用され、
前記半導体素子と、前記半導体用フィルムの前記接着剤層とを接着させて用いるものである上記(1)に記載の半導体フィルム
(14) 上記(1)に記載の半導体用フィルムの前記接着剤層と、半導体ウエハの一方の面とを接着する接着工程と、
前記半導体ウエハを前記半導体用フィルムが接着された状態で個片化して、半導体素子を得る個片化工程と、
前記半導体用フィルムを前記シート基材と前記接着剤層との間で剥離して、前記接着剤層を有する半導体素子をピックアップするピックアップ工程と、
前記半導体素子を前記接着剤層が接着するように、基板を含む構造体に搭載する搭載工程とを有することを特徴とする半導体装置の製造方法。
(15) 前記接着工程と前記個片化工程との間に、さらに前記半導体ウエハの前記機能面と反対側の面を研磨する研磨工程を有する上記(14)に記載の半導体装置の製造方法。
(16) 前記構造体は、前記基板と、該基板の一方の面側に搭載された他の半導体素子とを有し、
前記搭載工程において、前記半導体素子を、前記構造体の前記他の半導体素子の他方の面側に搭載する上記(15)に記載の半導体装置の製造方法。
(17) 前記構造体は、前記他の半導体素子と、前記基板とが、架橋反応可能な樹脂およびフラックス活性を有する化合物を含む樹脂組成物の硬化物で構成される他の接着層で、あらかじめ接合されているものである上記(16)に記載の半導体装置の製造方法。
(18) 前記半導体ウエハの前記一方の面は、予め突起電極が形成された半導体ウエハの機能面である上記(17)に記載の半導体装置の製造方法。
(19) 前記半導体ウエハは、その厚さ方向に貫通する複数の導体部を有し、
前記個片化工程において、前記半導体素子として、厚さ方向に貫通する導体部を有する半導体素子が得られる上記(18)に記載の半導体装置の製造方法。
(20) 上記(1)に記載の半導体用フィルムの前記接着剤層の硬化物を有することを特徴とする半導体装置。
(21) 基板と、前記基板の少なくとも一方の面側に設けられた第1半導体素子と、厚さ方向に貫通する導体部を有する第2半導体素子とを有する半導体装置であって、
前記第1半導体素子と前記第2半導体素子とが、突起電極を介して電気的に接続されており、
前記第1半導体素子と、前記第2半導体素子との間には、架橋反応可能な樹脂およびフラックス活性を有する化合物を含む樹脂組成物の硬化物で構成される第1接着層が配置されてなることを特徴とする半導体装置。
(22) 前記基板と前記第1半導体素子とが、突起電極を介して電気的に接続されており、かつ前記基板と前記第1半導体素子との間には、架橋反応可能な樹脂およびフラックス活性を有する化合物を含む樹脂組成物の硬化物で構成される第2接着層が配置されているものである上記(21)に記載の半導体装置。
(23) 前記樹脂組成物は、さらにフィルム形成樹脂を含むものである上記(22)に記載の半導体装置。
(24) 前記フラックス活性を有する化合物は、カルボキシル基およびフェノール性水酸基の少なくとも一方を有する化合物である上記(23)に記載の半導体装置。
(25) 前記フラックス活性を有する化合物は、前記架橋反応可能な樹脂の硬化剤として作用することができるものである上記(24)に記載の半導体装置。
また、本発明の半導体装置の製造方法は、上記半導体用フィルムの前記接着剤層と、半導体ウエハの一方の面とを接着する接着工程と、前記半導体ウエハを前記半導体用フィルムが接着された状態で個片化して、半導体素子を得る個片化工程と、前記半導体用フィルムを前記シート基材と前記接着剤層との間で剥離して、前記接着剤層を有する半導体素子をピックアップするピックアップ工程と、前記半導体素子を前記接着剤層が接着するように、基板を含む構造体に搭載する搭載工程とを有することを特徴とする。
また、本発明の半導体装置は、上記半導体用フィルムの前記接着剤層の硬化物を有することを特徴とする。
また、本発明の半導体装置は、基板と、前記基板の少なくとも一方の面側に設けられた第1半導体素子と、厚さ方向に貫通する導体部を有する第2半導体素子とを有する半導体装置であって、前記第1半導体素子と前記第2半導体素子とが、突起電極を介して電気的に接続されており、前記第1半導体素子と、前記第2半導体素子との間には、架橋反応可能な樹脂およびフラックス活性を有する化合物を含む樹脂組成物の硬化物で構成される第1接着層が配置されてなることを特徴とする。
まず、半導体用フィルムについて説明する。
半導体用フィルム10は、図1に示すように、シート基材1と、このシート基材1の上面(一方の面)に設けられた接着剤層2とで構成されている。図示しないが、シート基材1と接着剤層2との間には、離型フィルムが設けられていても良い。これにより、シート基材1と接着剤層2との間の剥離が容易となり、半導体ウエハをダイシングして得られた半導体素子のピックアップ性を向上することができる。
前記架橋反応可能な樹脂としては、例えばエポキシ樹脂、オキセタン樹脂、フェノール樹脂、(メタ)アクリレート樹脂、不飽和ポリエステル樹脂、ジアリルフタレート樹脂、マレイミド樹脂等のいわゆる熱硬化性樹脂に分類されるものに加え、カルボキシル基、エポキシ基等の官能基を有する熱可塑性樹脂等が挙げられる。これらの中でも、接着剤層2の硬化性と保存性、接着剤層2の硬化物の耐熱性、耐湿性、耐薬品性に優れることから、エポキシ樹脂が好適に用いられる。
このフラックス活性を有する化合物として、より具体的には分子中にカルボキシル基および/またはフェノール性水酸基を少なくとも1つ以上有する化合物が挙げられ、これは液状であっても固体であっても構わない。
他の脂肪族カルボン酸としては、蟻酸、酢酸、プロピオン酸、酪酸、吉草酸、ピバル酸カプロン酸、カプリル酸、ラウリン酸、ミリスチン酸、パルミチン酸、ステアリン酸、アクリル酸、メタクリル酸、クロトン酸、オレイン酸、フマル酸、マレイン酸、シュウ酸、マロン酸、琥珀酸等が挙げられる。
このフラックス活性を有する硬化剤としては、例えば1分子中にエポキシ樹脂等の架橋反応可能な樹脂に付加することができる少なくとも2個のフェノール性水酸基と、金属酸化膜に対してフラックス作用を示す、芳香族に直接結合したカルボキシル基を一分子中に少なくとも1個有する化合物が挙げられる。
具体的には、2,3-ジヒドロキシ安息香酸、2,4-ジヒドロキシ安息香酸、ゲンチジン酸(2,5-ジヒドロキシ安息香酸)、2,6-ジヒドロキシ安息香酸、3,4-ジヒドロキシ安息香酸、没食子酸(3,4,5-トリヒドロキシ安息香酸)等の安息香酸誘導体;1,4-ジヒドロキシ-2-ナフトエ酸、3,5-ジヒドロキシ-2-ナフトエ酸、3,7-ジヒドロキシ-2-ナフトエ酸等のナフトエ酸誘導体;フェノールフタリン;およびジフェノール酸等が挙げられる。
これらのフラックス活性を有する化合物は、単独で用いても、2種以上を組み合わせて用いてもよい。
前記硬化剤としては、例えばフェノール類、アミン類、チオール類が挙げられる。架橋反応可能な樹脂としてエポキシ樹脂が用いられる場合、このエポキシ樹脂との良好な反応性、硬化時における接着剤層2の寸法変化が小さく、硬化後の接着剤層2において適切な物性(例えば、耐熱性、耐湿性等)が得られるという点で、フェノール類が好適に用いられる。
前記イミダゾール化合物としては、特に限定されないが、融点が150℃以上のイミダゾール化合物を使用することが好ましい。これにより、接着剤層2に硬化を生じさせる機能(接着剤層2の硬化性)と、接着剤層2のフラックス機能との両立を図ることが容易となる。すなわち、イミダゾール化合物の融点が低すぎると、電気接続部(半田バンプ)の酸化膜が除去され、電気接続部同士(半田バンプと電極と)が金属接合する前に接着剤層2が硬化してしまい、接続が不安定になったり、接着剤層2(半導体用フィルム10)の保存性が低下したりする場合を抑制することができる。
融点が150℃以上のイミダゾール化合物としては、例えば2-フェニルヒドロキシイミダゾール、2-フェニル-4-メチルヒドロキシイミダゾール、2-フェニル-4-メチルイミダゾール等が挙げられる。なお、イミダゾール化合物の融点の上限に特に制限はなく、例えば接着剤層2の接着温度に応じて適宜設定することができる。
前記フィルム形成性樹脂としては、例えばフェノキシ樹脂、ポリエステル樹脂、ポリウレタン樹脂、ポリイミド樹脂、シロキサン変性ポリイミド樹脂、ポリブタジエン、ポリプロピレン、スチレン-ブタジエン-スチレン共重合体、スチレン-エチレン-ブチレン-スチレン共重合体等のスチレン系共重合体、ポリアセタール樹脂、ポリビニルブチラール樹脂、ポリビニルアセタール樹脂、ブチルゴム、クロロプレンゴム、ポリアミド樹脂、アクリロニトリル-ブタジエン共重合体、アクリロニトリル-ブタジエン-アクリル酸共重合体、アクリロニトリル-ブタジエン-スチレン共重合体、ポリ酢酸ビニル、ナイロン、アクリルゴム等を用いることができる。これらは、単独で用いても、2種以上を組み合わせて用いてもよい。
フィルム形成性樹脂として、アクリルゴムが用いられる場合、フィルム状の接着剤層2を作製する際の成膜安定性を向上させることができる。また、接着剤層2の硬化物の弾性率を低下させ、被接着物と接着剤層2の硬化物との間における残留応力を低減することができるため、接着剤層2の硬化物の被接着物に対する密着性を向上させることができる。
シート基材1は、支持基材と粘着剤層とからなるものであり、その支持基材には、例えば、耐熱性や耐薬品性の優れた樹脂フィルム、および、樹脂フィルムを構成する樹脂を架橋処理した架橋フィルム、さらに、この樹脂フィルムの表面にシリコーン樹脂等を塗布して剥離処理したフィルムを用いることができる。
なお、樹脂フィルムを構成する樹脂としては、特に限定されないが、例えば、ポリエステル、ポリエチレン、ポリプロピレン、ポリブテン、ポリブタジエンのようなポリオレフィン、塩化ビニル、エチレンーメタクリル酸共重合体、エチレン酢酸ビニル共重合体、ポリエステル、ポリイミド、ポリエチレンテレフタレート、ポリアミド、ポリウレタン等が挙げられる。
また、シート基材1の厚さは、特に限定されないが、3μm以上、500μm以下が好ましく、3μm以上、100μm以下がより好ましく、10μm以上、75μm以下であることが特に好ましい。
シート基材1および接着剤層2の厚さが、それぞれ前記下限値未満であると半導体用フィルム10としての効果が低下する場合があり、前記上限値を超えると製品の製造が難しく厚み精度が低下する場合がある。
接着剤層2は、架橋反応可能な樹脂およびフラックス活性を有する化合物等を混合し、ポリエステルシート等の剥離基材21上に塗布し、所定の温度で乾燥することにより得られる。剥離基材21上に形成された接着剤層2の接着剤層2側のみをハーフカットすることにより、接着剤層2を半導体用ウエハとほぼ同じ形状、例えば、円形状とすることができる。この場合、接着剤層2および剥離基材21からなる接着フィルムが得られる。
また、半導体用フィルム10をシート基材1と接着剤層2との間に、図示しない離型フィルムが設けられた構成とする場合には、接着剤層2は、架橋反応可能な樹脂およびフラックス活性を有する化合物等を混合し、ポリエチレンテレフタレートフィルム等の離型フィルム上に塗布し、所定の温度で乾燥することにより得られる。さらにポリエステルシート等の剥離基材21を接着剤層2側にラミネートしたのち、離型フィルムおよび接着剤層2側のみをハーフカットすることにより、離型フィルムおよび接着剤層2を半導体用ウエハとほぼ同じ形状、例えば、円形状とすることができる。この場合、離型フィルム、接着剤層2および剥離基材21で構成される接着フィルムが得られる。
そして、接着フィルムの接着剤層2または離型フィルムの上に、シート基材1の粘着剤層が接するようにシート基材1を積層することで、シート基材1の支持基材、シート基材1の粘着剤層、(離型フィルム、)接着剤層2および剥離基材21で構成される剥離基材21付きの半導体用フィルム10を得ることができる(図2参照)。
溶融粘度を前記下限値以上とすることにより、加熱時に接着剤層2が被接着物からはみ出すことによる接着信頼性の低下を抑制でき、かつはみ出しによる周辺部材の汚染も抑制することができる。さらに、接着剤層2中における気泡の発生、例えば、半導体素子と基板との間において樹脂組成物の未充填部位の発生等の不良も防止することができる。さらに、半田が濡れ拡がりすぎてしまい、基板側の隣接する電気接続部(電極)同士の間でショートするといった問題も防止することが可能となる。
また、前記上限値以下とすることで、電気接続部同士(半田バンプと回路基板電極と)を金属接合する際に、電気接続部同士の間の樹脂組成物が排除されるため接合不良を抑制することが可能となる。
また、接着剤層2が前記最低溶融粘度に至る温度は、特に限定されないが、120~180℃であることが好ましく、特に140~170℃が好ましい。前記温度範囲で接着剤層2が最低溶融粘度を示すと、半導体素子を基板(回路基板)等に搭載するのが容易となるからである。
接着剤層2の溶融粘度は、例えば以下の測定方法により求められる。
厚み100μmの接着剤層2を、粘弾性測定装置(Rheo Stress RS-10 HAAKE(株)社製)で昇温速度10℃/min、周波数0.1Hzで、歪み一定-応力検知で測定できる。
より具体的に、接着剤層2は、630nmでの透過率が50%以上であることが好ましく、特に70~100%であることが好ましい。透過率が前記範囲内であると、特に半導体素子の認識性に優れ、電気接続部同士の間での接続率を向上することができる。
次に、このような半導体用フィルム10を用いて半導体装置を製造する方法および半導体装置の実施形態について説明する。
まず、剥離基材21付きの半導体用フィルム10から、剥離基材21を除去して、半導体用フィルム10を用意する。なお、接着剤層2(および離型フィルム)は、半導体用ウエハとほぼ同じ形状(本実施形態では、円形)およびサイズに形成されている。
次に、図3に示すように、半導体用ウエハ3の機能面(一方の面)31と、接着剤層2とが接触するように、半導体用ウエハ3と半導体用フィルム10とを積層する(接着工程)。なお、図示されていないが、この機能面31には、予め半田バンプ(突起電極)が形成されているのが好ましい。これにより、半導体ウエハを個片化後、基板に実装するという操作で、半導体装置を容易に製造することができる。
次に、図4に示すように、シート基材1の上側の面(図4中の上側)を、研磨装置の研磨ステージ4に固定する。研磨装置は、特に限定されることは無く市販されているものを用いることができる。そして、この状態で、研磨装置を作動して、半導体ウエハ3の機能面31と反対側の面(他方の面)を研磨(バックグラインド)する(研磨工程)。なお、この研磨工程は、必要に応じて行うようにすればよく、省略してもよい。
ここで、バックグラインドした後の半導体用ウエハ3の厚さは、特に限定されないが、30~600μm程度とすることが好ましい。
なお、本発明の半導体用フィルム10は、接着剤層2がフラックス活性を有する化合物を含む樹脂組成物のため、半導体ウエハ3の機能面31に直接ラミネートすることが可能である。
このように、本発明の半導体用フィルム10は、シート基材1がバックグラインドテープ機能と、ダイシングテープ機能とを有することができ、かつ接着剤層2がフラックス活性を有するのでフラックス塗布工程等を省略できる。そのため、フラックス洗浄工程が不要で生産性に優れ、かつ半導体ウエハ3を加工する際の作業性を向上させることができる。
次に、半導体装置の製造方法および半導体装置の他の実施形態について説明する。
図6は、本発明の半導体装置の一例(他の実施形態)を示す断面図である。
図6に示すように、半導体装置100は、基板110と、基板110の上側(図6中の上側)に搭載されている第1半導体素子(他の半導体素子)101と、第1半導体素子101の上側(図6中の上側)に搭載されている第2半導体素子102とを有している。本実施形態では、基板110と第1半導体素子101とにより、第2半導体素子102を搭載する構造体が構成されている。
基板110の上側の面には、図示しない回路パターンが形成されており、電極パッド(電気接続部)が配置されている。
第1半導体素子101と基板110とは、半田バンプ(突起電極)111を介して電気的に接続されている。第1半導体素子101と、基板110との間には、半田バンプ111(接合部分)の周囲を保護するように架橋反応可能な樹脂およびフラックス活性を有する化合物を含む樹脂組成物の硬化物で構成される第2接着層(他の接着層)112が配置されている。
基板110としては、例えばセラミック基板または有機基板等を用いることができる。セラミック基板としては、アルミナ基板、窒化アルミニウム基板等を用いることができる。有機基板としては、ポリイミドフィルムを基板として用いたポリイミドフィルム基板、ガラスクロスにエポキシ樹脂を含浸させたFR-4基板、ビスマレイミド-トリアジン樹脂を含浸させたBT基板等を用いることができる。
このアンダーフィル材を第1半導体素子101の一辺または複数面に塗布することにより、毛細管現象を利用して、基板110と第1半導体素子101との間隙に流れ込ませた後、硬化させ、その硬化物を形成して電気接続部(電極)を保護する。
図7は、本発明の半導体装置の製造方法の一例(他の実施形態)を示す模式図である。
まず、架橋可能な樹脂およびフラックス活性を有する化合物を含む樹脂組成物で構成される接着剤層2およびシート基材1とを備える積層体、すなわち、前述した半導体用フィルム10と同様の半導体用フィルム10’を製造する。
なお、本実施形態の半導体用フィルム10’は、支持基材9と粘着剤層8とからなるシート基材1’と接着剤層2とを備える。
このような半導体用フィルム10’を製造するには、まず、図7(a)に示すように、剥離基材21’上に、架橋反応可能な化合物およびフラックス活性を有する化合物を含む樹脂組成物を塗布、乾燥し、接着剤層2を得る。この接着剤層2側をハーフカットすることにより、接着剤層2を半導体用ウエハとほぼ同じ形状、例えば、円形状とすることができる。この場合、接着剤層2および剥離基材21’からなる接着フィルムが得られる。
また、支持基材9と粘着剤層8とからなるシート基材1’と接着剤層2との間に、図示しない離型フィルムが設けられた構成とする場合には、接着剤層2は、架橋反応可能な樹脂およびフラックス活性を有する化合物等を混合し、離型フィルム上に塗布し、所定の温度で乾燥することにより得られる。さらに剥離基材21’を接着剤層2側にラミネートしたのち、離型フィルムおよび接着剤層2側をハーフカットすることにより、離型フィルムおよび接着剤層2を半導体用ウエハとほぼ同じ形状、例えば、円形状とすることができる。この場合、離型フィルム、接着剤層2および剥離基材21’で構成される接着フィルムが得られる。
次に、(離型フィルム、)接着剤層2および剥離基材21’で構成される接着フィルムと、支持基材9と粘着剤層8とで構成されるシート基材1’とを、接着フィルムの接着剤層2または離型フィルムと、シート基材1’の粘着剤層8とが接触するように、ラミネーター等でラミネートして、剥離基材21’付きの半導体用フィルム10’が得られる(図7(b))。
次に、図7(c)に示すように、この剥離基材21’付きの半導体用フィルム10’から剥離基材21’を剥離して接着剤層2と、厚さ方向に貫通する複数の導体部123を有する半導体ウエハ3’の一方の面(図7(c)中の下側の面)とが、接触するように積層する(接着工程)。
本発明では、上述のようなフラックス活性を有する接着剤層2を用いているので、第1および第2半導体素子101、102同士の半田接続に際して、フラックス処理が不要となるものである。また、耐リフロー性にも優れている。
1A.接着フィルムの製造
架橋反応可能な樹脂としてエポキシ樹脂(NC6000(エポキシ当量200g/eq、日本化薬(株)製)47.00重量%、フィルム形成性樹脂としてアクリル酸エステル共重合体(アクリル酸ブチル-アクリル酸エチル-アクリロニトリル-アクリル酸-アクリル酸ヒドロキシエチル共重合体、ナガセケムテックス(株)製、SG-708-6、重量平均分子量:500,000)19.51重量%とアクリル樹脂(アクリル酸-スチレン共重合体、重量平均分子量:5,500、UC-3900、東亜合成(株)製)9.75重量%、硬化剤として固形フェノール樹脂(PR-53647、水酸基当量104g/OH基、住友ベークライト(株)製)10.26重量%、硬化促進剤としてイミダゾール化合物(2P4MHZ、四国化成工業(株)製)0.08重量%、フラックス化合物としてフェノールフタリン12.88重量%、カップリング剤としてプロピルトリメトキシシラン(KBM303、信越化学工業(株)製)0.52重量%をメチルエチルケトン(MEK)に溶解して樹脂固形分40%の樹脂ワニスを得た。
この樹脂ワニスを、コンマコーターを用いて、ポリエチレンテレフタレートフィルム(厚さ15μm)からなる離型フィルム上に塗布した後、90℃、5分間乾燥して、厚さ40μmの接着剤層を離型フィルム上に形成した。その後、さらに厚さ38μmのポリエステルシートからなる剥離基材(カバーフィルム)を接着剤層側にラミネートして、剥離基材、接着剤層および離型フィルムで構成される接着フィルムを得た。
クリアテックCT-H717(クラレ製)を、押し出し機で、厚み100μmのフィルムを形成し、表面をコロナ処理して支持基材を得た。
次に、アクリル酸2-エチルヘキシル50重量部、アクリル酸ブチル10重量部、酢酸ビニル37重量部、メタクリル酸2-ヒドロキシエチル3重量部を共重合して得られた重量平均分子量500,000の共重合体を、剥離処理した厚さ38μmのポリエステルフィルムからなる剥離基材(カバーフィルム)上に、乾燥後の厚さが10μmになるように塗工し、80℃で5分間乾燥し、粘着剤層を得た。その後、この粘着剤層を上述した支持基材のコロナ処理面にラミネートして、支持基材と粘着剤層とからなるシート基材および剥離基材(カバーフィルム)で構成される粘着フィルム(剥離基材(カバーフィルム)付きシート基材)を得た。
上述の接着フィルムの離型フィルムおよび接着剤層側を、半導体ウエハに接着される部分を残すようにハーフカットした後、上述の粘着フィルムの粘着剤層から剥離基材(カバーフィルム)を剥離して、接着フィルムの離型フィルムと、粘着フィルムの粘着剤層とが接触するように貼り付けた。これにより、シート基材の支持基材、シート基材の粘着剤層、離型フィルム、接着剤層および剥離基材(カバーフィルム)がこの順に積層されてなる剥離基材(カバーフィルム)付きの半導体用フィルムを得た。
この剥離基材(カバーフィルム)付きの半導体用フィルムの剥離基材(カバーフィルム)を剥離して、接着剤層を直径8インチ、厚さ725μmの半導体ウエハのバンプがついている面に温度110℃、圧力0.3MPaで貼り付けし、半導体用フィルムが接着された半導体ウエハを得た。そして、シート基材1の上側(支持基材)の面(図4中の上側)を、研磨装置の研磨ステージ4に固定し、半導体用ウエハの厚さが725μmから100μmとなるまで研削を行った。
次に、この半導体用ウエハを、図5に示すように、シート基材1の支持基材とダイサーテーブル5の上面とが接触するように設置して、ダイシングソーを用いて、スピンドル回転数30,000rpm、切断速度50mm/secで5mm×5mm角のサイズに半導体ウエハおよび接着剤層をダイシング(切断)した。
次に、半導体用フィルムの裏面から突上げし、接着剤層と離型フィルムとの間で剥離して、接着剤層(接着フィルム)が接着された半導体素子(60μmΦ、Sn3Ag0.5Cuバンプ、ピッチ200μm、バンプ数225、PI保護膜付き:日立超LSI社製)を得た。この半導体素子を、ソルダーレジスト(太陽インキ製造社製:PSR4000 AUS308)をコーティングしたBT(ビスマレイミド-トリアジン)樹脂基板(0.8mmt)に、フリップチップボンダーを用いて位置合わせを行った後に、250℃、10secで圧着させてフリップチップパッケージを得た。それを180℃、1時間で後硬化させた。
なお、接着剤層の透過率は、97%であった。
フィルム形成性樹脂を、アクリル樹脂(アクリル酸-スチレン共重合体、重量平均分子量:5,500、UC-3900、東亜合成(株)製)を用いずに、アクリル酸エステル共重合体(アクリル酸ブチル-アクリル酸エチル-アクリロニトリル-アクリル酸-アクリル酸ヒドロキシエチル共重合体、ナガセケムテックス(株)製、SG-708-6、重量平均分子量:500,000)29.26重量%とした以外は、実施例A1と同様にした。
なお、接着剤層の透過率は、97%であった。
架橋反応可能な樹脂を、エポキシ樹脂(NC6000(エポキシ当量200g/eq、日本化薬(株)製)37.60重量%、フィルム形成性樹脂としてアクリル酸エステル共重合体(アクリル酸ブチル-アクリル酸エチル-アクリロニトリル-アクリル酸-アクリル酸ヒドロキシエチル共重合体、ナガセケムテックス(株)製、SG-708-6、重量平均分子量:500,000)15.60重量%とアクリル樹脂(アクリル酸-スチレン共重合体、重量平均分子量:5,500、UC-3900、東亜合成(株)製)7.80重量%、硬化剤として固形フェノール樹脂(PR-53647、水酸基当量104g/OH基、住友ベークライト(株)製)8.21重量%、硬化促進剤としてイミダゾール化合物(2P4MHZ、四国化成工業(株)製)0.07重量%、フラックス化合物としてフェノールフタリン10.30重量%、カップリング剤としてプロピルトリメトキシシラン(KBM303、信越化学工業(株)製)0.42重量%をメチルエチルケトン(MEK)に溶解し、さらにシリカ(クオートロンSP-03B、扶桑化学工業(株)製、平均粒径0.02μmシリカ)20.00重量%を加え分散し、固形分40%の樹脂ワニスを得た。それ以外は実施例A1と同様にした。
なお、接着剤層の透過率は、52%であった。
なお、接着剤層の透過率は、98%であった。
半導体用フィルムの製造において、離型フィルムを用いずに、下記のようにして半導体用フィルムを得た以外は、実施例A1と同様にした。
上述の樹脂ワニスを、コンマコーターを用いて、ポリエステルシート(厚さ38μm)からなる剥離基材(カバーフィルム)上に塗布した後、90℃、5分間乾燥して、厚さ40μmの接着剤層を剥離基材(カバーフィルム)上に形成して、剥離基材(カバーフィルム)および接着剤層で構成される接着フィルムを得た。
上述の接着フィルムの接着剤層側を、半導体ウエハに接着される部分を残すようにハーフカットした後、上述の粘着フィルムの粘着剤層から剥離基材(カバーフィルム)を剥離して、接着フィルムの接着剤層と、粘着フィルムの粘着剤層とが接触するように貼り付けた。これにより、シート基材の支持基材、シート基材の粘着剤層、接着剤層および剥離基材(カバーフィルム)がこの順に積層されてなる剥離基材(カバーフィルム)付きの半導体用フィルムを得た。
なお、接着剤層の透過率は、97%であった。
フィルム形成性樹脂としてアクリル酸エステル共重合体(アクリル酸ブチル-アクリル酸エチル-アクリロニトリル共重合体、ナガセケムテックス(株)製、SG-PZ、重量平均分子量:850,000)62.12重量%、フラックス化合物としてフェノールフタリン12.88重量%をメチルエチルケトン(MEK)に溶解し、さらにシリカ(クオートロンSP-03B、扶桑化学工業(株)製、平均粒径0.02μmシリカ)25.00重量%を加え分散し、固形分40%の樹脂ワニスを得た。それ以外は実施例A1と同様にした。
なお、接着剤層の透過率は、98%であった。
実施例1でフラックス活性物質であるフェノールフタリンを使用せず、固形フェノール樹脂(PR-53647、水酸基当量104g/OH基、住友ベークライト(株)製)23.14重量%にした以外は実施例A1と同様に行なった。
なお、接着剤層の透過率は、96%であった。
バックグラインドテープ(三井化学社製、品番イクロステープ)を半導体用ウエハに接着した。そして、バックグラインドテープと、バックグラインド装置の研磨ステージとが接するように設置した後、バックグラインド装置によりウエハ厚みを725μmから100μmまで研削を行なった。
次に、バックグラインドテープを半導体用ウエハから剥離し、その後、ダインシングシート(住友ベークライト社製、品番スミライトFSL)に張り替えて、このダイシングシートとダイサーテーブルの上面とが接触するように設置して、ダイシングソーを用いて、スピンドル回転数30,000rpm、切断速度50mm/secで5mm×5mm角の半導体素子(60μmΦ、Sn3Ag0.5Cuバンプ、ピッチ200μm、バンプ数225、PI保護膜付き:日立超LSI社製)のサイズにダイシング(切断)した。
次に、この半導体素子機能面にフラックスを塗布し、ソルダーレジスト(太陽インキ製造社製:PSR4000 AUS308)をコーティングしたBT(ビスマレイミド-トリアジン)樹脂基板(0.8mmt)に、フリップチップボンダーを用いて位置合わせを行った後に、250℃、10secで圧着させてフリップチップパッケージを得た。次に余分なフラックスを、フラックス洗浄液を用いて洗浄した。その後、半導体素子と基板の間に液状封止樹脂を流し込み、150℃、2時間で硬化を行い、半導体装置を得た。
比較例3の生産工数を基準(100)として、他の実施例および比較例の生産性を比較した。各符号は、以下の通りである。なお、表中の-は、評価できなかったことを示す。
◎:比較例3Aの生産工数を基準(100)として、生産工数が40以上、60未満であった。
○:比較例3Aの生産工数を基準(100)として、生産工数が60以上、80未満であった。
△:比較例3Aの生産工数を基準(100)として、生産工数が80以上、100未満であった。
×:比較例3Aの生産工数を基準(100)として、生産工数が100以上であった。
接着剤層の染み出しは、目視で評価した。各符号は、以下の通りである。
◎:接着剤層の染み出しが、ほとんど観察されなかった。
○:接着剤層の染み出しは観察されるが、1mm未満であった。
△:接着剤層の染み出しが観察され、1mm以上、5mm未満であった。
×:接着剤層の染み出しが観察され5mm以上であった。
接続信頼性は、得られた半導体装置をヒートサイクル試験後に導通がとれるかどうかで評価した。
具体的には、半導体素子、基板間の接続抵抗を、デジタルマルチデジタルメータにより測定した。測定は半導体装置を作製後と、-65℃で1時間および150℃で1時間の温度サイクル1,000サイクル後の両方を測定した。各符号は、以下の通りである。
◎:20/20個の半導体装置で導通が取れた。
○:18~19/20個の半導体装置で導通が取れた。
△:16~17/20個の半導体装置で導通が取れた。
×:16以下/20個の半導体装置で導通が取れた。
また、実施例A1~A5の半導体装置(特に、実施例A2およびA3の半導体装置)では、接着剤の染み出しも抑制されていることが確認された。
また、実施例A1~A5の半導体装置(特に、実施例A1、A4およびA5の実施例)では、接続信頼性も優れていた。
1B.接着フィルムの製造
まず、実施例A1と同様にして、樹脂ワニスを得た。
次いで、この樹脂ワニスを、コンマコーターを用いて、ポリエチレンテレフタレートフィルム(厚さ38μm)からなる離型フィルム上に塗布した後、90℃、5分間乾燥して、厚さ35μmの接着剤層を離型フィルム上に形成して、接着剤層および離型フィルムで構成される接着フィルムを得た。
次に、実施例A1と同様にして、粘着フィルムを得た。
次に、実施例A5と同様にして、半導体用フィルムを得た。
この剥離基材(カバーフィルム)付きの半導体用フィルムの剥離基材(カバーフィルム)を剥離して、接着剤層を半導体ウエハ(直径8インチ、100μm厚さ)の裏面に、温度110℃、圧力0.3MPaで貼り付けし、半導体用フィルムが接着された半導体ウエハを得た。
次に、この半導体ウエハを、ダイシングソーを用いて、スピンドル回転数30,000rpm、切断速度50mm/secで7mm×7mm角のサイズにダイシング(切断)した。そして、接着剤層の裏面から突上げし、半導体用フィルムの粘着剤層と接着剤層との間で剥離して、接着剤層が接着された第2半導体素子(電極数480、ポスト径30μm・高さ20μm、ピッチ50μm、錫銀半田高さ10μm)を得た。
予め、第1半導体素子(サイズ7mm×7mm、厚さ100μm、電極数480、ポスト径30μm・高さ20μm、ピッチ50μm、錫銀半田高さ10μm)がソルダーレジスト(太陽インキ製造社製:PSR4000 AUS308)をコーティングしたBT(ビスマレイミド-トリアジン)樹脂基板(0.8mmt)に、接合されているものに、上述の接着剤層を有する第2半導体素子を、接着剤層と、第1半導体素子とが接触するようにフリップチップボンダーを用いて位置合わせを行った後に、250℃、10secで圧着させて搭載した。そして、180℃×60分間加熱することにより接着剤層を硬化して接着層とし、2つの半導体素子が積層された半導体装置を得た。
フィルム形成性樹脂を、アクリル樹脂(アクリル酸-スチレン共重合体、重量平均分子量:5,500、UC-3900、東亜合成(株)製)を用いずに、アクリル酸エステル共重合体(アクリル酸ブチル-アクリル酸エチル-アクリロニトリル-アクリル酸-アクリル酸ヒドロキシエチル共重合体、ナガセケムテックス(株)製、SG-708-6、重量平均分子量:500,000)29.26重量%とした以外は、実施例B1と同様にした。
架橋反応可能な樹脂を、エポキシ樹脂(NC6000(エポキシ当量200g/eq、日本化薬(株)製)37.60重量%、フィルム形成性樹脂としてアクリル酸エステル共重合体(アクリル酸ブチル-アクリル酸エチル-アクリロニトリル-アクリル酸-アクリル酸ヒドロキシエチル共重合体、ナガセケムテックス(株)製、SG-708-6、重量平均分子量:500,000)15.60重量%とアクリル樹脂(アクリル酸-スチレン共重合体、重量平均分子量:5,500、UC-3900、東亜合成(株)製)7.80重量%、硬化剤として固形フェノール樹脂(PR-53647、水酸基当量104g/OH基、住友ベークライト(株)製)8.21重量%、硬化促進剤としてイミダゾール化合物(2P4MHZ、四国化成工業(株)製)0.07重量%、フラックス化合物としてフェノールフタリン10.30重量%、カップリング剤としてプロピルトリメトキシシラン(KBM303、信越化学工業(株)製)0.42重量%をメチルエチルケトン(MEK)に溶解し、さらにシリカ(クオートロンSP-03B 扶桑化学工業(株)製、平均粒径0.02umシリカ)20.00重量%を加え分散して、樹脂ワニスを得た。それ以外は実施例B1と同様にした。
樹脂ワニスとして、以下のものを用いた以外は実施例1と同様にした。
架橋反応可能な樹脂を、エポキシ樹脂(エポキシ当量180g/eq、エピクロン840S、大日本インキ化学工業(株)製)62.5重量%、フィルム形成性樹脂としてフェノキシ樹脂(YL-6954、ジャパンエポキシレジン(株)製)25.00重量%、硬化剤として固形フェノール樹脂(PR-53647、水酸基当量104g/OH基、住友ベークライト(株)製)31.30重量%、硬化促進剤としてリン系化合物(テトラフェニルフォスフィン/フェニルトリメトキシシラン/2,3-ジヒドロキシナフタレンの分子化合物)0.50重量%、フラックス化合物としてセバシン酸5.70重量%をメチルエチルケトン(MEK)に溶解し、固形分40%の樹脂ワニスを得た。
半導体ウエハを、ダイシングソーを用いて、スピンドル回転数30,000rpm、切断速度50mm/secで7mm×7mm角のサイズにダイシング(切断)し、第1半導体素子を得た。
次に、この第1半導体素子の裏面(機能素子面の反対面)にフラックスを塗布し、ソルダーレジスト(太陽インキ製造社製:PSR4000 AUS308)をコーティングしたBT(ビスマレイミド-トリアジン)樹脂基板(0.8mmt)に、フリップチップボンダーを用いて位置合わせを行った後に、250℃、10secで圧着させてフリップチップパッケージを得た。
次に、余分なフラックスを、フラックス洗浄液を用いて洗浄した。その後、半導体素子と基板との間に液状封止樹脂(住友ベークライト社製、品番CRP-4152D1)を流し込み、150℃、2時間で硬化を行い、半導体装置を得た。
次に、別の半導体ウエハを、ダイシングソーを用いて、スピンドル回転数30,000rpm、切断速度50mm/secで5mm×5mm角のサイズにダイシング(切断)して、第2半導体素子(電極数480、ポスト径30μm・高さ20μm、ピッチ50μm、錫銀半田高さ10μm)を得た。
この第2半導体素子の裏面(機能素子面の反対面)にフラックスを塗布し、第1半導体素子に、フリップチップボンダーを用いて位置合わせを行った後に、250℃、10sec圧着させてフリップチップパッケージを得た。次に余分なフラックスを、フラックス洗浄液を用いて洗浄した。その後、第1半導体素子と第2半導体素子との間に液状封止樹脂(住友ベークライト社製社製、品番CRP-4120B2)を流し込み、150℃、2時間で硬化を行い、半導体装置を得た。
接続信頼性は、得られた半導体装置をヒートサイクル試験後に導通がとれるかどうかで評価した。
これは、前述した接続信頼性において記載したのと同様にして行った。
耐リフロー性は、得られた半導体装置を85℃/85%RH/168時間吸湿処理をした後、260℃のIRリフローを3回行い走査型超音波探傷機(SAT)で評価した。各符号は、以下の通りである。
◎:クラックが、全く無かった。
○:クラック発生数が、2個以下であった。
△:クラック発生数が、3個以上、5個以下であった。
×:クラック発生数が、6個以上であった。
比較例B1の生産工数を基準(100)として、前述した生産性において記載したのと同様にして、他の実施例および比較例の生産性を比較した。
また、実施例B1~B4は、半導体装置の生産性にも優れていることが示された。
また、比較例B1のような半導体素子と基板との間に液状封止樹脂を流し込む方法では、上述したような狭ピッチの電極(配線)間に、液状封止樹脂を流し込むことが困難であり、充填性が不十分となり、半導体装置の接続信頼性が低下すること示された。
また、本発明によれば、半導体素子と、基板を含む構造体とを生産性良く接合する半導体装置の製造方法を得ることができる。
また、本発明によれば、上記半導体用フィルムの接着剤層の硬化物を有する半導体装置を得ることができる。
また、本発明によれば、半導体素子と、基板を含む構造体とが好適に接合された半導体装置を得ることができる。したがって、産業上の利用可能性を有する。
Claims (25)
- シート基材と、該シート基材の一方の面側に設けられた接着剤層とを有する半導体用フィルムであって、
前記接着剤層が、架橋反応可能な樹脂およびフラックス活性を有する化合物を含む樹脂組成物で構成されていることを特徴とする半導体用フィルム。 - 半導体素子の電極端子面と、前記半導体用フィルムの前記接着剤層とを接着させて用いるものである請求項1に記載の半導体用フィルム。
- フリップチップ型の半導体素子の機能面と、前記半導体用フィルムの前記接着剤層とを接着させて用いるものである請求項1に記載の半導体用フィルム。
- 前記半導体用フィルムの前記接着剤層を常温から10℃/分の昇温速度で溶融状態まで昇温したときに初期は溶融粘度が減少し、最低溶融粘度に到達した後、さらに上昇するような特性を有し、かつ前記最低溶融粘度が10Pa・s以上、10,000Pa・s以下である請求項3に記載の半導体用フィルム。
- さらに、前記シート基材と前記接着剤層との間に、離型フィルムを有するものである請求項1に記載の半導体用フィルム。
- 前記半導体用フィルムの前記接着剤層は、半導体素子の表面に接着された状態で、前記半導体素子の前記表面が認識可能な程度の透明性を有するものである請求項1に記載の半導体用フィルム。
- 前記樹脂組成物が、さらにフィルム形成性樹脂を含むものである請求項1に記載の半導体用フィルム。
- 前記樹脂組成物が、さらに硬化剤を含むものである請求項7に記載の半導体用フィルム。
- 前記樹脂組成物が、さらに無機充填剤を含むものである請求項8に記載の半導体用フィルム。
- 前記無機充填剤の平均粒子径が、0.5μm以下である請求項9に記載の半導体用フィルム。
- 前記フラックス活性を有する化合物は、フラックス活性を有する硬化剤である請求項1に記載の半導体用フィルム。
- 前記フラックス活性を有する化合物は、カルボキシル基およびフェノール性水酸基の少なくとも一方を有する化合物である請求項1に記載の半導体用フィルム。
- 半導体素子と、
基板および該基板の一方の面側に搭載された他の半導体素子を含む構造体の他の半導体素子とを接着するのに使用され、
前記半導体素子と、前記半導体用フィルムの前記接着剤層とを接着させて用いるものである請求項1に記載の半導体用フィルム。 - 請求項1に記載の半導体用フィルムの前記接着剤層と、半導体ウエハの一方の面とを接着する接着工程と、
前記半導体ウエハを前記半導体用フィルムが接着された状態で個片化して、半導体素子を得る個片化工程と、
前記半導体用フィルムを前記シート基材と前記接着剤層との間で剥離して、前記接着剤層を有する半導体素子をピックアップするピックアップ工程と、
前記半導体素子を前記接着剤層が接着するように、基板を含む構造体に搭載する搭載工程とを有することを特徴とする半導体装置の製造方法。 - 前記接着工程と前記個片化工程との間に、さらに前記半導体ウエハの前記機能面と反対側の面を研磨する研磨工程を有する請求項14に記載の半導体装置の製造方法。
- 前記構造体は、前記基板と、該基板の一方の面側に搭載された他の半導体素子とを有し、
前記搭載工程において、前記半導体素子を、前記構造体の前記他の半導体素子の他方の面側に搭載する請求項15に記載の半導体装置の製造方法。 - 前記構造体は、前記他の半導体素子と、前記基板とが、架橋反応可能な樹脂およびフラックス活性を有する化合物を含む樹脂組成物の硬化物で構成される他の接着層で、あらかじめ接合されているものである請求項16に記載の半導体装置の製造方法。
- 前記半導体ウエハの前記一方の面は、予め突起電極が形成された半導体ウエハの機能面である請求項17に記載の半導体装置の製造方法。
- 前記半導体ウエハは、その厚さ方向に貫通する複数の導体部を有し、
前記個片化工程において、前記半導体素子として、厚さ方向に貫通する導体部を有する半導体素子が得られる請求項18に記載の半導体装置の製造方法。 - 請求項1に記載の半導体用フィルムの前記接着剤層の硬化物を有することを特徴とする半導体装置。
- 基板と、前記基板の少なくとも一方の面側に設けられた第1半導体素子と、厚さ方向に貫通する導体部を有する第2半導体素子とを有する半導体装置であって、
前記第1半導体素子と前記第2半導体素子とが、突起電極を介して電気的に接続されており、
前記第1半導体素子と、前記第2半導体素子との間には、架橋反応可能な樹脂およびフラックス活性を有する化合物を含む樹脂組成物の硬化物で構成される第1接着層が配置されてなることを特徴とする半導体装置。 - 前記基板と前記第1半導体素子とが、突起電極を介して電気的に接続されており、かつ前記基板と前記第1半導体素子との間には、架橋反応可能な樹脂およびフラックス活性を有する化合物を含む樹脂組成物の硬化物で構成される第2接着層が配置されているものである請求項21に記載の半導体装置。
- 前記樹脂組成物は、さらにフィルム形成樹脂を含むものである請求項22に記載の半導体装置。
- 前記フラックス活性を有する化合物は、カルボキシル基およびフェノール性水酸基の少なくとも一方を有する化合物である請求項23に記載の半導体装置。
- 前記フラックス活性を有する化合物は、前記架橋反応可能な樹脂の硬化剤として作用することができるものである請求項24に記載の半導体装置。
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| JP2008167547A JP2010010368A (ja) | 2008-06-26 | 2008-06-26 | 半導体装置および半導体装置の製造方法 |
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| WO2009099191A1 true WO2009099191A1 (ja) | 2009-08-13 |
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| EP (1) | EP2242090A4 (ja) |
| KR (1) | KR101193291B1 (ja) |
| CN (1) | CN101939825B (ja) |
| TW (1) | TWI432546B (ja) |
| WO (1) | WO2009099191A1 (ja) |
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| WO2011048774A1 (ja) * | 2009-10-19 | 2011-04-28 | 住友ベークライト株式会社 | 電子装置の製造方法、電子装置および電子装置の製造装置 |
| JP2011108770A (ja) * | 2009-11-16 | 2011-06-02 | Sumitomo Bakelite Co Ltd | 半導体装置の製造方法、半導体装置、および電子部品の製造方法、電子部品 |
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| CN103081068A (zh) * | 2010-09-06 | 2013-05-01 | 日东电工株式会社 | 半导体装置用薄膜以及半导体装置 |
| WO2012032959A1 (ja) * | 2010-09-06 | 2012-03-15 | 日東電工株式会社 | 半導体装置用フィルム、及び、半導体装置 |
| TWI458005B (zh) * | 2010-09-06 | 2014-10-21 | Nitto Denko Corp | 半導體裝置用膜及半導體裝置 |
| CN103081068B (zh) * | 2010-09-06 | 2016-08-03 | 日东电工株式会社 | 半导体装置用薄膜以及半导体装置 |
| CN103189464A (zh) * | 2010-10-22 | 2013-07-03 | 日立化成株式会社 | 粘接剂组合物、半导体装置的制造方法以及半导体装置 |
| CN103189464B (zh) * | 2010-10-22 | 2015-11-25 | 日立化成株式会社 | 粘接剂组合物、半导体装置的制造方法以及半导体装置 |
| JP2012209545A (ja) * | 2011-03-17 | 2012-10-25 | Sekisui Chem Co Ltd | 半導体積層体の製造方法 |
| JP2013030765A (ja) * | 2011-06-22 | 2013-02-07 | Nitto Denko Corp | 半導体装置の製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2242090A4 (en) | 2011-05-18 |
| KR20100105756A (ko) | 2010-09-29 |
| US8759957B2 (en) | 2014-06-24 |
| TW200942594A (en) | 2009-10-16 |
| CN101939825B (zh) | 2013-04-03 |
| CN101939825A (zh) | 2011-01-05 |
| TWI432546B (zh) | 2014-04-01 |
| US20110006419A1 (en) | 2011-01-13 |
| KR101193291B1 (ko) | 2012-10-19 |
| EP2242090A1 (en) | 2010-10-20 |
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