Patent ID: 6380603
Filing Date: 2002-04-30
Classification: H01L

Abstract:
A semiconductor device comprising:a semiconductor multilayer structure of a first conductivity type; a first semiconductor layer of a second conductivity type, formed on the semiconductor multilayer structure of the first conductivity type; a photosensitive section comprising a PN junction between the semiconductor multilayer structure of the first conductivity type and the first semiconductor layer of the second conductivity type; and a partitioning portion for splitting the photosensitive section into a plurality of regions, wherein the semiconductor multilayer structure of the first conductivity type comprises: a semiconductor substrate of the first conductivity type; a first semiconductor layer of the first conductivity type formed on the semiconductor substrate of the first conductivity type; and a second semiconductor layer of the first conductivity type formed on the first semiconductor layer of the first conductivity type, wherein the photosensitive section is formed in a region surrounded by a third semiconductor layer of the first conductivity type, the third semiconductor layer of the first conductivity type extending from a surface of the first semiconductor layer of the second conductivity type so as to reach the second semiconductor layer of the first conductivity type, and a fourth semiconductor layer of the first conductivity type is provided under the third semiconductor layer of the first conductivity type, wherein the fourth semiconductor layer of the first conductivity type overlaps with at least a portion of the third semiconductor layer of the first conductivity type, extends through the second semiconductor layer of the first conductivity type, and at least reaches the first semiconductor layer of the first conductivity type, and wherein the partitioning portion comprises a fifth semiconductor layer of the first conductivity type extending from the first semiconductor layer of the second conductivity type so as to reach the second semiconductor layer of the first conductivity type but not to reach the first semiconductor layer of the first conductivity type.