| 摘要 |
PROBLEM TO BE SOLVED: To provide such a covering protective material for semiconductors as having a small internal stress as well as an excellent adhesivity and transmission, and to provide a light emitting semiconductor device which covers a light-emitting semiconductor using the above material and has a high luminous efficiency. SOLUTION: The covering protective material for light-emitting semiconductors contains (A) 100 pts.mass of an organopolysiloxane having a vinyl group at the end of the molecular chain, (B) specific pts.mass of an organohydrodiene polysiloxane, (C) 1-1,000 ppm of a platinum group metal in a platinum group metal-based catalyst based on the sum total weight of components (A) and (B), and (D) 0-10 pts.mass of an organosilicon compound having a silicon atom-bonded alkoxy group, end a cured substance of which has a refractive index at 25°C and 589 nm (D line of sodium) of 1.41-1.56. The light emitting semiconductor device protected coveringly with this light emitting semiconductor-covering protective material has a very little discoloration at a heat testing and a high luminous efficiency, consequently is a long-life and excellent energy-saving light emitting semiconductor device, thus has a great merit in the industry. COPYRIGHT: (C)2005,JPO&NCIPI
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