Patent ID: 6989522
Filing Date: 2006-01-24
Classification: H01L

Abstract:
1. A light-receiving device comprising: a substrate having a low-concentration impurity region; a high-concentration impurity layer of a first conductivity type and a high-concentration impurity layer of a second conductivity type, one of which serves as an anode and the other serves as a cathode of the light-receiving device, each having a predetermined thickness, and formed at a light-entering side of the substrate and in contact with the low-concentration impurity region so as to function as a light-receiving portion; and a layer having a short carrier life time, formed in contact with the low-concentration impurity region at a bottom surface of the substrate so as to restrict a depletion layer in the low-concentration impurity region of the substrate to a predetermined thickness and eliminate carriers generated within the layer quickly before the carriers produce a photoelectric current.