Patent ID: 7952162
Filing Date: 2011-05-31
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a substrate; isolation layers, each of which is formed in a trench formed on the substrate and has an insulating film constituting sides of the isolation layer, and a conductive layer constituting a bottom surface of the isolation layer and electrically connected to the substrate; a semiconductor layer of a first conductivity type for storing signal charges, which is disposed between the isolation layers to be isolated from the conductive layers by the insulating films, and has a bottom surface whose height is higher than heights of the bottom surfaces of the isolation layers; a semiconductor layer of a second conductivity type, which is disposed under the semiconductor layer of the first conductivity type to contact the bottom surface of the semiconductor layer of the first conductivity type and the bottom surfaces of the isolation layers; and a transistor having a gate insulator film formed on the semiconductor layer of the first conductivity type and a gate electrode formed on the gate insulator film.