Patent ID: 7994552
Filing Date: 2011-08-09
Classification: H01L

Abstract:
1. A photoelectric conversion apparatus comprising: a semiconductor substrate of a first conductivity type; a first impurity region of a second conductivity type opposite to the first conductivity type; a photoelectric conversion element including a second impurity region of the first conductivity type formed within the first impurity region, and a third impurity region of the second conductivity type formed on and adjacent to the second impurity region; and a transfer MOS transistor for transferring an electric charge accumulated in the second impurity region, wherein the first impurity region includes a surface region in which a channel of the transfer MOS transistor is formed, a first region formed under the surface region, a second region formed under the first region, and a third region formed under the second region, such that a peak impurity concentration C wherein the second impurity region includes a fourth region and a fifth region such that a part of at least one of the fourth and fifth regions is arranged under the transfer MOS transistor.