Patent ID: 6420764
Filing Date: 2002-07-16
Classification: H01L,Y10S

Abstract:
A field-effect transistor, comprising:a first monocrystalline semiconductor region forming a first part of a body region; a second monocrystalline semiconductor region overlying the first part of the body region and forming a second part of the body region, said second part of the body region including a channel region and formed in a single deposited, integral silicon layer that also contains source and drain regions; a dielectric layer having a first uniform thickness adjacent the channel and a second uniform thickness at a location spaced from the channel region; first and second semiconductor source/drain regions in the same contiguous, integral silicon layer as the channel region and laterally adjoining opposite sides of the channel region and being electrically isolated from the underlying semiconductor region, each of the source/drain regions includes a substantially monocrystalline semiconductor region, the source and drain regions overlying both the first portion of the dielectric layer and the second portion of the dielectric layer; a second dielectric layer overlying said first and second semiconductor regions; and an electrically conductive layer extending through an opening in the second dielectric layer and in electrical contact with each of the source/drain regions.