OPTICAL SEMICONDUCTOR, METHOD FOR PRODUCING SAME, SURFACE TREATMENT AGENT FOR SILVER, AND LIGHT-EMITTING DEVICE

摘要

An optical semiconductor device according to one mode of the present invention is provided with a substrate in which a silver-plating layer is formed on a surface, a light-emission diode which is bonded to the silver-plating layer, a light reflection part which forms an inner space for housing the light-emission diode by means of light reflection surfaces surrounding the light-emission diode, a silver sulfurization prevention film which covers the silver-plated layer, and a transparent sealing part which seals the light-emission diode by being filled into the inner space, wherein: the silver sulfurization prevention film has a gas barrier layer exhibiting gas-barrier properties due to clay, and a primer layer provided to the lower layer of the gas barrier layer and exhibiting adhesive properties; and the transparent sealing part comes into contact with the primer layer.