| abstract |
A curability capable of forming a highly transparent lens-shaped coating or sealing body by applying an appropriate amount directly to a LED chip mounted on a support structure using a dispenser, and molding and curing the LED chip. A silicone rubber composition is provided. (A) Organopolysiloxane having two or more aliphatic unsaturated bonds in one molecule and being essentially linear, (B) an organopolysiloxane having two or more aliphatic unsaturated bonds in one molecule and having a resin structure; (C) an organohydrogenpolysiloxane having two or more silicon-bonded hydrogen atoms in one molecule; (D) a platinum group metal catalyst, (E) The thixotropic agent other than (F) component and (F) fumed silica are contained, and the refractive index of the composition comprising components (A) to (E) is 1.42 to 1.47. And a photo-semiconductor device using the same as a sealing material. [Selection] Figure 1 |