Patent ID: 6380604
Filing Date: 2002-04-30
Classification: B82Y,H01L,Y02E

Abstract:
A semiconductor optical detector, comprising:a first semiconductor layer having a conductivity type; a second semiconductor layer formed on said first semiconductor layer; a third semiconductor layer formed on said second semiconductor layer, said third semiconductor layer having said conductivity type; a pyramidal pit formed in said third semiconductor layer so as to invade into said second semiconductor layer, said pyramidal pit being defined by a plurality of facets merging together at an apex located in said second semiconductor layer in the vicinity of an interface to said first semiconductor layer, said apex being located with an offset from said interface; a channel layer covering said plurality of facets continuously in said pyramidal pit, said channel layer having said conductivity type; a barrier layer formed in said pyramidal pit so as to cover said channel layer; a cap layer formed in said pyramidal pit so as to cover said barrier layer; an optical window formed on said cap layer; a first electrode formed on said third semiconductor layer; and a second electrode formed on said first semiconductor layer.