Patent ID: 6548880
Filing Date: 2003-04-15
Classification: H01L

Abstract:
An optical semiconductor device comprising:a substrate having an opening; a conductive layer formed on a bottom surface of said substrate; a plurality of external electrodes formed on an external surface of said substrate; a light emitting device or photodetector which is mounted on said conductive layer of said substrate and electrically connected to said conductive layer and said external electrodes; a cap, including a top surface and a lower surface, the lower surface including a substantially continuously planar surface section which overlays the opening of said substrate and extends beyond the opening; a conductive layer formed on the lower surface of said cap facing said light emitting device or photodetector on said bottom surface of said substrate; and a photodetector or light emitting device, which is mounted on said conductive layer of said cap, and electrically connected to said conductive layer of said cap and said plurality of external electrodes, and facing said light emitting device or photodetector mounted on said bottom surface of said substrate.