Patent ID: 8164202
Filing Date: 2012-04-24
Classification: C08G,C08L,H01L

Abstract:
1. An optical semiconductor device, comprising an optical semiconductor element and a cured product of a silicone resin composition that encapsulates the optical semiconductor element, wherein the silicone resin composition comprises: (A) an aliphatic unsaturated group-containing organopolysiloxane comprising: wherein each R 1 independently represents a methyl group, an ethyl group, a propyl group or a cyclohexyl group, R 2 represents a phenyl group, R 3 represents an aliphatic unsaturated group, X represents a hydrogen atom or an alkyl group of 1 to 6 carbon atoms, provided the OX group is bonded to the silicon atom via the oxygen atom, a represents a number from 0.4 to 1.6, b represents a number from 1.6 to 3.6, c represents a number from 0.4 to 0.8, and d represents a number from 0 to 0.05, provided that 0<a+b+c+d<4, and wherein R 4 and R 5 each independently represents a methyl group, ethyl group, propyl group, cyclohexyl group or phenyl group, R 6 represents a vinyl group or allyl group, k and l each represents an integer of 0 to 1,000, provided that k+1 is within a range from 10 to 1,000 and (1/k+1)<0.5, and x represents an integer of 1 to 3; (B) an organohydrogenpolysiloxane comprising: wherein R 7 each independently represents a methyl group, ethyl group, propyl group, cyclohexyl group or phenyl group, p and q each represents an integer of 0 to 100, x and y each independently represents 0, 1, 2 or 3, provided that p+q is not less than 3, and x+y+p is an integer of 2 or more, and (C) a platinum group metal-based catalyst and wherein an amount of (ΦSiO 3/2 ) units wherein Φ represents a phenyl group within the cured product, determined by solid 29 Si-DD/MAS analysis, is within a range from 0.13 mol/100 g to 0.37 mol/100 g.