Patent ID: 8772431

Claim:
A heat-curable silicone resin composition for sealing optical semiconductors comprising: (A) 100 parts by mass of a polysiloxane containing two or more silanol groups in the molecule; (B) from 0.1 to 2,000 parts by mass of a silane compound containing two or more alkoxy groups that are bonded to a silicon atom in the molecule; and (C) a zirconium metal salt expressed by Formula (I): (wherein n is an integer from 1 to 3; each R 1 is a hydrocarbon group having from 1 to 16 carbons; and each R 2 is a hydrocarbon group having from 1 to 18 carbons); and the R 1 of Formula (I) is at least one selected from the group consisting of a cyclopropyl group, a cyclopentyl group, a cyclohexyl group, an adamanthyl group, and a naphthene ring.