Patent ID: 7002235
Filing Date: 2006-02-21
Classification: H01L

Abstract:
1. A semiconductor device formed on an SOI substrate, the semiconductor device comprising: a semiconductor support substrate; a buried insulation film disposed on the semiconductor support substrate and having portions which have been removed so that remaining portions of the buried insulating film form a plurality of buried insulating film island regions; a single-crystal silicon active layer disposed on the buried insulation film and having portions which have been removed so that remaining portions of the single-crystal silicon active layer form a plurality of single-crystal silicon active layer island regions defining single-crystal silicon resistors of a resistance circuit; an insulation film disposed on sidewalls of step portions of the single-crystal silicon active layer; and a plurality of side spacers made of polycrystalline silicon and disposed on the insulating film, the buried insulating film island regions, and the semiconductor support substrate.