Optical semiconductor device, optical communication device, and electronic equipment

摘要

An optical semiconductor device has an optical semiconductor element ( 2 ) such as an LED or PD, and a light-permeable resin ( 4 ) encapsulating the optical semiconductor element. The light-permeable resin contains a base resin and filler. The light-permeable resin ( 4 ) has a characteristic that its transmittance increases with a temperature rise within an operating temperature range (e.g., -40° C.-+85° C.).