Patent ID: 6953979
Filing Date: 2005-10-11
Classification: H01L

Abstract:
1. A semiconductor device having a SOI structure including a semiconductor substrate, a buried insulation layer and an SOI layer, said semiconductor device comprising: plurality of device formation regions in which predetermined devices are to be formed respectively, said plurality of device formation regions being provided in said SOI layer; at least one isolation region provided in said SOI layer for insulatively isolating said plurality of device formation regions from each other; and a body region provided in said SOI layer and capable of externally fixing electric potential, wherein at least part of said at least one isolation region includes a partial isolation region having a partial insulation region formed in an upper part thereof and a semiconductor region formed in a lower part thereof between at least two of said device formation regions, said semiconductor region serving as part of said SOI layer and being formed in contact with at least one of said plurality of device formation regions and said body region, said semiconductor region doped with impurities of the same conductivity type as said at least one of said plurality of device formation regions and said body region.