Patent ID: 6710378
Filing Date: 2004-03-23
Classification: G02B,H01L

Abstract:
A semiconductor light reception device comprising:a substrate having a principal surface; a photo sensor formed in a partial area of the principal surface of said substrate, said photo sensor including a light reception layer parallel to the principal surface, the light reception layer being made of semiconductor and generating carriers in response to received light; a light waveguide formed in a partial area of the principal surface of said substrate, said light waveguide propagating light in a direction parallel to the principal surface and introducing light into the light reception layer, and said light waveguide including a lower clad, a core formed on the lower clad, and an upper clad formed on the core; wherein a composition of the core is different than a composition of the light reception layer; wherein a thickness of the core is greater than a thickness of the light reception layer, an insulating or high resistance side protective film covering at least a portion of a side face of said photo sensor; electrodes for flowing current into the light reception layer of said photo sensor in a thickness direction of the light reception layer.