Patent ID: 7687365
Filing Date: 2010-03-30
Classification: H01L

Abstract:
1. A method of forming a semiconducting device comprising: providing a substrate comprising at least a first semiconductor layer and a second semiconductor layer separated by an insulating layer, said first semiconductor layer and said second semiconducting layer having a same crystalline orientation; protecting a portion of the substrate to define an UTSOI region, while leaving another portion of the substrate unprotected, said unprotected portion of the substrate defining a bulk-Si region; etching said unprotected portion of the substrate to expose a surface of the second semiconductor layer; forming a first isolation region on a sidewall of the portion of the substrate that defines the UTSOI region; regrowing a semiconductor material on said exposed surface of the second semiconductor layer to provide the semiconductor material of the bulk-Si region, said semiconductor material of the bulk-Si region having said same crystalline orientation, wherein the first isolation region isolates the first semiconductor layer of the UTSOI region from the semiconductor material of the bulk-Si region; planarizing the substrate containing the semiconductor material so that an upper surface of the first semiconductor layer is substantially planar with an upper surface of the semiconductor material; and forming at least one first device in said UTSOI region, while forming at least one second device on said semiconductor material in said bulk-Si region, wherein said forming the at least one second device within said bulk-Si region further comprises implanting said bulk-Si region with a first dopant to provide a well region, forming at least one gate region atop a surface of said bulk-Si region, forming source and drain regions adjacent said at least one gate region with a second type dopant, and forming a contact to said well region in direct contact with the semiconductor material in the bulk-Si region, wherein the contact is isolated from the source and drain regions by a second isolation region that is present between the contact and the source drain regions, in which said contact stabilizes floating body effects.