Patent ID: 6737718
Filing Date: 2004-05-18
Classification: H01L

Abstract:
A semiconductor device including:a waveguide mesa structure including at least an optical absorption layer for photoelectric conversion; and a heat radiation semiconductor layer in contact directly with at least a part of said optical absorption layer for heat radiation from said optical absorption layer, and said heat radiation semiconductor layer being lower in refractive index and larger in energy band gap than said optical absorption layer, wherein, said optical absorption layer and said waveguide mesa structure are at least partially surrounded by and in contact directly with said heat radiation semiconductor layer, said optical absorption layer is omnidirectionally surrounded by said heat radiation semiconductor layer said wave guide mesa structure is at least partially surrounded by and in contact directly with said heat radiation semiconductor layer said heat radiation semiconductor layer is so thick that said waveguide mesa structure is buried in said heat radiation semiconductor layer, and said heat radiation semiconductor layer has a first groove which is positioned in a back-side of said waveguide mesa structure, and said back-side is opposite to a front side, from which a light is incident into said waveguide mesa structure, and said first groove acting as a back-side reflective mirror for reflecting a light to said waveguide mesa structure.