Patent ID: 8399950
Filing Date: 2013-03-19
Classification: H01L

Abstract:
1. A photodiode comprising: a photosensitive element formed in a silicon semiconductor layer on an insulation layer, wherein said photosensitive element includes: a low concentration diffusion layer with one of a P-type impurity and an N-type impurity diffused therein at a low concentration; a P-type high concentration diffusion layer with the P-type impurity diffused therein at a first high concentration; an N-type high concentration diffusion layer with the N-type impurity diffused therein at a second high concentration, said P-type high concentration diffusion layer being arranged to face the N-type high concentration diffusion layer with the low concentration diffusion layer in between; and an insulation material layer with transparency formed on the silicon semiconductor layer, said insulation material layer having an opening portion in an area for forming the low concentration diffusion layer, wherein said silicon semiconductor layer has a thin thickness portion in the area for forming the low concentration diffusion layer.