Patent ID: 6072217
Filing Date: 2000-06-06
Classification: H01L

Abstract:
A fully depleted SOI device comprising:a semiconductor substrate;a first conductive well formed in a principal surface of said semiconductor substrate;a second conductive well formed in said principal surface of said semiconductor substrate and spaced from said first conductive well;an insulating layer formed along said principal surface of said semiconductor substrate and extending across said first and second conductive wells;a first transistor formed on said insulating layer such that said insulating layer is interposed between said first transistor and said semiconductor substrate, said first transistor including first source and drain regions of a first conductivity type formed on said insulating layer, a first channel region formed on said insulating layer and aligned over said first conductive well, and a first gate electrode aligned over said first channel region;a second transistor formed on said insulating layer such that said insulating layer is interposed between said second transistor and said semiconductor substrate, said second transistor including second source and drain regions of a second conductivity type formed on said insulating layer, a second channel region formed on said insulating layer and aligned over said second conductive well, and a second gate electrode aligned over said second channel region;a first ohmic contact connected to said first conductive well for applying a first bias potential to said first transistor; anda second ohmic contact connected to said second conductive well for applying a second bias potential to said second transistor;wherein one of said first and second conductive wells is of a conductivity type which is the same as a conductivity type of said semiconductor substrate, and wherein said device further comprises a semiconductor region surrounding said one of said first and second conductive wells within said semiconductor substrate, said semiconductor region having a conductivity type which is opposite that of said one of said first and second conductive wells.