Patent ID: 7951891

Claim:
A silicone resin composition for die bonding, comprising: (A) a straight-chain dimethylpolysiloxane with both terminals blocked with dimethylvinylsiloxy groups, and having formula (4): Vi(R 6 ) 2 SiO[Si(R 6 ) 2 O] e Si(R 6 ) 2 Vi wherein each R 6 represents, independently, a methyl group, Vi represents a vinyl group, and e is an integer which provides the straight-chain dimethylpolysiloxane of formula (4) with a viscosity at 25° C. of 5 to 700 mPa·s (B) a three dimensional network organopolysiloxane resin that is in the form of a gum with a viscosity at 23° C. of at least 10,000,000 mPa·s or solid at 23° C., and is at least one selected from the group consisting of: (Me 3 SiO 1/2 ) l (ViMe 2 SiO 1/2 ) m (SiO 4/2 ) s , wherein Me represents a methyl group, Vi represents a vinyl group, and l, m and s are numbers that satisfy 0.65≧1≧0.392, 0.65≧m≧0.052, 0.6≧s≧0.2, and l+m+s=1; (ViMeSiO) n (Me 2 SiO) p (MeSiO 3/2 ) r , wherein Me represents a methyl group, Vi represents a vinyl group, and n, p and r are numbers that satisfy 0.5≧n≧0.2, 0.5≧p≧0.15, 0.6≧r≧0.2, and n+p+r=1; and (ViMe 2 SiO 1/2 ) m (Me 2 SiO) p (MeSiO 3/2 ) r , wherein Me represents a methyl group, Vi represents a vinyl group, and m, p and r are numbers that satisfy 0.65≧m≧0.2, 0.5≧p≧0.2, 0.6≧r≧0.2, and m+p+r=1; in sufficient quantity to provide from 60 to 90 parts by mass of component (B) per 100 parts by mass of a combination of said component (A) and said component (B), (C) an organohydrogenpolysiloxane having at least 2 hydrogen atoms bonded to silicon atoms within each molecule, represented by the general formula (8) shown below: Me 3 SiO[SiMe(H)O] t SiMe 3 (8) wherein Me represents a methyl group, t represents an integer from 2 to 30, in sufficient quantity to provide from 0.5 to 5.0 mols of hydrogen atoms bonded to silicon atoms within component (C) for every 1 mol of silicon atom-bonded alkenyl groups within a combination of said component (A) and said component (B), and (D) an effective quantity of a platinum-group metal-based catalyst.