Patent ID: 8723285
Filing Date: 2014-05-13
Classification: H01L

Abstract:
1. A photoelectric conversion device comprising: an n-type surface region; a p-type region which is formed under the surface region; an n-type buried layer which is formed under the p-type region; an element isolation region formed of an insulator; and an n-type barrier region arranged between the n-type buried layer and the element isolation region so as to surround a part of the p-type region, wherein the surface region, the p-type region, and the buried layer form a buried photodiode, a diffusion coefficient of a dominant impurity of the surface region is smaller than a diffusion coefficient of a dominant impurity of the buried layer, and a diffusion coefficient of a dominant impurity of the barrier region is smaller than the diffusion coefficient of the dominant impurity of the buried layer.