Curable silicone composition, cured product thereof, and optical semiconductor device

US9902811B2 · kind B2 · utility

Assignees

• Dow Corning Toray Co., Ltd. · JP
• Dow Corning Corporation · US

Inventors

• Stanton Dent · Midland, US
• Tomohiro Iimura · Ichihara, JP
• Yusuke Miyamoto · Nisshin, JP
• Yoshitsugu Morita · Chiba, JP
• Fumito Nishida · Midland, US
• Emil Radkov · Kyle, US
• Jacob William Steinbrecher · Midland, US
• Hiroaki Yoshida · Ibaraki, JP
• Makoto Yoshitake · Ichihara, JP

Key dates

• Filing date: Feb 21, 2014
• Grant date: Feb 27, 2018
• Expiry date: Feb 21, 2034

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01L2924/181
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

This invention relates to a curable silicone composition comprising: (A) a straight-chain organopolysiloxane having at least two alkenyl groups in a molecule; (B) an organopolysiloxane represented by the following average unit formula: (R1SiO3/2)a(R12SiO2/2)b(R13SiO1/2)c(SiO4/2)d(XO1/2)e wherein, R1 each independently represent an alkyl group having from 1 to 12 carbons, an alkenyl group having from 2 to 12 carbons, an aryl group having from 6 to 20 carbons, an aralkyl group having from 7 to 20 carbons, or a group in which some or all of the hydrogen atoms of these groups are substituted with halogen atoms, with the proviso that at least two R1 in a molecule are the alkenyl groups, X is a hydrogen atom or an alkyl group, a is a number from 0 to 0.3, b is 0 or a positive number, c is a positive number, d is a positive number, e is a number from 0 to 0.4, a+b+c+d=1, c/d is a number from 0 to 10, and b/d is a number from 0 to 0.5; (C) an organopolysiloxane having at least two silicon-bonded hydrogen atoms in a molecule; (D) a cerium-containing organopolysiloxane; and (E) a hydrosilylation reaction catalyst. The curable silicone composition does not develop cracks due to thermal aging …