| abstract |
A reflector (4) formed to surround the periphery of an optical semiconductor element (3) mounted on the metal lead frame. The reflector (4) Wherein at least one of the epoxy resin (A), the curing agent (B), the white pigment (C), the inorganic filler (D), the carboxylic acid and water is used as the material for forming the reflector (4) (E), and the total content of (C) and (D) is 69 to 94% by weight of the total epoxy resin composition and the content of (E) Based on the total amount of the epoxy resin composition. Therefore, it is possible to provide excellent moldability and anti-blocking property, to suppress the occurrence of warpage and to maintain a high glass transition temperature. Therefore, fabrication by transfer molding or the like becomes possible, and it is also advantageous in terms of mass productivity. |