THERMOSETTING COMPOSITION FOR OPTICAL SEMICONDUCTOR, DIE BOND MATERIAL FOR OPTICAL SEMICONDUCTOR DEVICE, UNDERFILL MATERIAL FOR OPTICAL SEMICONDUCTOR DEVICE, SEALING AGENT FOR OPTICAL SEMICONDUCTOR DEVICE, AND OPTICAL SEMICONDUCTOR DEVICE

摘要

To provide a thermosetting composition for an optical semiconductor which is highly transparent, is free-from decrease in thickness or discoloration of a cured product due to heat generation or light emitting of a light emitting device, is superior in heat resistance and lightfastness, and has excellent adhesion to a housing material or the like, a sealing agent for an optical semiconductor device and a die bond material for an optical semiconductor device using the same, and an optical semiconductor device obtained by using the thermosetting composition for an optical semiconductor, the sealing agent for an optical semiconductor, the die bond material for an optical semiconductor device and/or the underfill material for an optical semiconductor device.;A thermosetting composition for an optical semiconductor containing a silicone resin having a cyclic ether-containing groups and a thermosetting agent capable of reacting with said cyclic ether-containing group, wherein the silicone resin has, as the principal components, a structural unit expressed by the following formula (1) and a structural unit expressed by the following formula (2), the content of the structural unit expressed by the formula (1) is 0.6 to 0.95 (on a molar basis) and the content of the structural unit expressed by the formula (2) is 0.05 to 0.4 (on a molar basis) when total number of the structural units contained is taken as 1, and the content of the cyclic ether-containing group is 5 to 40 mol%:        [formula 1] (R¹R²SiO_2/2)     (1)and        [formula 2] (R³SiO_3/2)     (2)in the formula (1) and (2), at least one of R¹, R² and R³ represents a cyclic ether-containing group, R¹, R² and R³ other than the cyclic ether-containing group represent hydrocarbon having 1 to 8 carbon atoms or fluoride thereof and they may be the same or may be different from one another and plural types of R¹, R² and R³ different from each other in a repeating unit in a silicone resin skeleton may be contained.