Patent ID: 8013057

Claim:
An optical semiconductor case comprising the cured article of a white thermosetting silicone resin composition for molding an optical semiconductor case, the interior of the case being encapsulated by a transparent resin, said white thermosetting silicone resin composition comprising (A) 100 parts by weight of a thermosetting organopolysiloxane, (B) 3 to 200 parts by weight of a white pigment, (C) 400 to 1,000 parts by weight of an inorganic filler (other than the white pigment), (D) 0.01 to 10 parts by weight of a condensation catalyst, and (E) 0.1 to 8 parts by weight of a coupling agent represented by the following structural formula (2): R 3 d Si(OR 2 ) e (2) wherein R 3 represents an organic group of 1 to 10 carbon atoms containing a mercapto group, a glycidl group, or an amino group, R 2 independently represents an organic group of 1 to 4 carbon atoms, d represents 1 or 2, and e represents 2 or 3, wherein a content of the white pigment (B) is 1 to 50% by weight in relation to the entire white thermosetting silicone resin composition, and a total content of the white pigment (B) and the inorganic filler (C) is 70 to 93% by weight in the entire white thermosetting silicone resin composition.