The present invention provides a curable silicone composition for forming a cured product which inhibits the discoloration of silver electrodes or a silver-plated substrate in an optical semiconductor device due to a sulfur-containing gas, the curable silicone composition comprising: (A) an organopolysiloxane having at least two silicon-bonded alkenyl groups per molecule; (B) an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms per molecule; (C) an organic compound having an organic value of at least 175 in an organic conceptual diagram and having a specific group; and (D) a hydrosilylation reaction catalyst. In addition, the present invention provides an optical semiconductor device in which silver electrodes or a silver-plated substrate of an optical semiconductor device is sealed or covered with a cured product of the composition described above, the optical semiconductor device having excellent reliability after a sulfur resistance test.
本发明提供了一种可固化的有机
硅组合物,用于形成一种固化产品,该固化产品可抑制光学半导体器件中的
银电极或镀
银基板因含
硫气体而变色,该可固化的有机
硅组合物包括:(A)有机聚
硅氧烷,其每个分子至少具有两个
硅键烯基;(B)有机氢聚
硅氧烷,其每个分子至少具有两个
硅键氢原子;(C)有机化合物,其有机值在有机概念图中至少为175,并具有特定基团;和(D)
氢化硅反应催化剂。此外,本发明还提供了一种光半导体器件,在该器件中,光半导体器件的
银电极或镀
银基板被上述组合物的固化产物密封或覆盖,该光半导体器件在耐
硫测试后具有极佳的可靠性。