Patent ID: 7821807
Filing Date: 2010-10-26
Classification: B82Y,H01L

Abstract:
1. A photosensitive diode, comprising: an active region defining a majority carrier of a first conductivity type and a minority carrier of a second conductivity type opposite the first conductivity type; at least one extraction region disposed on a first side of said active region, said extraction region extracting said minority carriers from said active region and having majority carriers within said extraction region flowing toward said active region in a condition of reverse bias; at least one exclusion region disposed on a second side of said active region, said exclusion region inhibiting said minority carriers within said exclusion region from flowing toward said active region and receiving said majority carriers from said active region in a condition of reverse bias, at least one of said extraction and said exclusion regions including a barrier for substantially reducing flow of one of said majority carriers and said minority carriers that is flowing toward said active region while permitting flow of the other of said minority carriers and said majority carriers out of said active region, said barrier substantially reducing flow of said one of said carriers without relying on diffusion length of said one of said carriers in order to reduce said flow, and at least two biasing contacts for applying said reverse bias through said photosensitive diode, one said contact being coupled to said exclusion region and the other said contact being coupled to said extraction region.