Patent ID: 6545318
Filing Date: 2003-04-08
Classification: H01L

Abstract:
A semiconductor device including an SOI substrate composed of a semiconductor substrate, a buried oxide film, and a semiconductor layer, comprising:a first isolation insulating film formed in a manner as to surround first and second active regions arranged on a principal surface of said semiconductor layer and to be separated a specific distance from said buried oxide film; a second isolation insulating film formed in such a manner as to surround a third active region arranged on a principal surface of said semiconductor layer, to completely isolate the third active region from the first and second active regions, and to be formed in direct contact with said buried oxide film; a first active element formed in said first active region; a second active element formed in said second active region; an impurity layer formed between said buried oxide film and one principal plane of said semiconductor substrate; and a wiring line extending through said third active region and said buried oxide film to contact said impurity layer.