Patent ID: 6278156
Filing Date: 2001-08-21
Classification: H01L

Abstract:
A dielectrically isolated-type semiconductor device comprising:an SOI substrate having a substrate face side and a substrate back side, the face side and the back side being insulated and isolated by means of a buried insulating film, the back side being in a floating potential state, anda plurality of elements integrated on the face side of this SOI substrate and mutually isolated by a dielectric region, each of the plurality of elements including:a diffusion layer of a first conductive type isolated by said dielectric region,a diffusion layer of a second conductive type formed on the surface of the diffusion layer of the first conductive type,an outside diffusion layer of the second conductive type provided in a region outside the isolated region, andsaid diffusion layer of the second conductive type being set at the same potential as said outside diffusion layer of the second conductive type.