LEAD FRAME FOR OPTICAL SEMICONDUCTOR DEVICE, METHOD FOR MANUFACTURING SAME, AND OPTICAL SEMICONDUCTOR DEVICE

摘要

Disclosed is a lead frame for an optical semiconductor device, wherein a layer (2) composed of silver or a silver alloy is formed on a conductive base (1). The lead frame for an optical semiconductor device comprises, as the outermost layer, a surface layer (4) which is composed of a metal having excellent corrosion resistance or an alloy of the metal, and the concentration of the metal component having excellent corrosion resistance is not less than 50% by mass in the outermost portion of the surface layer. A solid solution layer (3) of silver and the metal material that serves as the main component of the surface layer is formed between the surface layer and the layer which is composed of silver or a silver alloy.