Patent ID: 7928483
Filing Date: 2011-04-19
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor substrate; a first-conductivity-type region formed in an upper portion of the semiconductor substrate and having a first conductivity type; a second-conductivity-type region formed in an upper portion of the semiconductor substrate, being in contact with the first-conductivity-type region, and having a second conductivity type that is different from the first conductivity type; a buried dielectric film provided immediately above the second-conductivity-type region, having a lower portion buried in the semiconductor substrate, and having an upper portion protruding from an upper surface of the semiconductor substrate; and an element isolation film having a lower portion buried in the semiconductor substrate, having an upper portion protruding from the upper surface of the semiconductor substrate, and having a lower surface located below a lower surface of the buried dielectric film, the second-conductivity-type region and the buried dielectric film being in contact with the first-conductivity-type region and isolating the first-conductivity-type region from a region that is on opposite side of the first-conductivity-type region across the second-conductivity-type region and is in contact with the second-conductivity-type region.