| abstract |
[Purpose] An epoxy resin composition that is extremely less likely to turn yellow even when the cured resin is placed under high temperature or is stored for a long period of time, has excellent light reflectivity, and retains high whiteness. A stopped optical semiconductor device is provided. [Constitution] (A) Epoxy resin having a hue of 4 or less by Gardner method, (B) para-alkyl-modified phenol resin, (C) imidazole curing accelerator, (D) titanium dioxide, (E) An epoxy resin composition containing an inorganic filler other than titanium dioxide as an essential constituent, and an optical semiconductor device sealed with this resin composition. [Selection figure] None |