Patent ID: 8569813
Filing Date: 2013-10-29
Classification: H01L

Abstract:
1. A photodiode having: a p type first semiconductor layer, an n type second semiconductor layer formed directly or via an intrinsic semiconductor layer on said first semiconductor layer and containing an n type electroconductive impurity at a low concentration, an n type third semiconductor layer that contains an n type electroconductive impurity at a medium concentration and is formed shallower than said second semiconductor layer in the main plane of the second semiconductor layer in a layout subdivided by said second semiconductor layer in at least one cross section, an n type fourth semiconductor layer that contains an n type electroconductive impurity at a high concentration and is formed shallower than said third semiconductor layer in the main plane of the third semiconductor layer in a layout subdivided by said second semiconductor layer in at least one cross section, and a metal-containing electroconductive layer formed on said fourth semiconductor layer in the same layout as the fourth semiconductor layer.