Patent ID: 7807736

Claim:
A semiconductor device which is not a light emitting semiconductor device, the semiconductor device being encapsulated with a silicone resin composition comprising: (A) a polyorganosiloxane having a resin structure comprising R 1 SiO 1.5 unit, R 2 2 SiO unit, and R 3 a R 4 b SiO (4-a-b)/2 unit wherein R 1 , R 2 , and R 3 are respectively methyl group, ethyl group, propyl group, cyclohexyl group, or phenyl group, R 4 is vinyl group or allyl group, a is 0, 1, or 2, b is 1 or 2, and a+b is 2 or 3, and number of recurrence of the R 2 2 SiO unit is 5 to 300; (B) a polyorganohydrogen siloxane having a resin structure comprising R 1 SiO 1.5 unit, R 2 2 SiO unit, and R 3 c H d SiO (4-c-d)/2 unit wherein R 1 , R 2 , and R 3 are as defined above, c is 0, 1 or 2, d is 1 or 2, and c+d is 2 or 3, and number of recurrence of the R 2 2 SiO unit is 5 to 300, the component (B) used at an amount such that molar ratio of hydrogen atom bonded to the silicon atom in the component (B) in relation to vinyl group or allyl group in the component (A) is 0.1 to 4.0; and (C) a catalytically effective amount of a platinum group metal catalyst, wherein said silicone resin composition is solid at room temperature and liquid at molding temperature, and cures into a transparent article having a hardness measured by Type D durometer according to JIS K 6253 of at least 30 and an elongation in a tensile test of at least 5%.