Patent ID: 8518781
Filing Date: 2013-08-27
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising: providing a substrate with a fin formed thereon, wherein the fin has a semiconductor layer formed of a semiconductor material having a first conductivity type; forming, over the substrate, a first insulating material layer surrounding the fin, wherein the first insulating material layer has a thickness less than the thickness of the semiconductor layer; introducing, into an exposed surface of the semiconductor layer, a first dopant that can impart a second conductivity type which is opposite to the first conductivity type, such that a first region having the second conductivity type is formed at least in the exposed surface of the semiconductor layer in a portion of the fin that is not covered by the first insulating material layer, wherein, the portion of the semiconductor layer other than the first region serves as a second region, the second region having the first conductivity type; forming a dummy gate for the fin to enclose a portion of the fin that corresponds to a channel region to be formed, wherein the dummy gate is formed above the first insulating material layer; forming a second insulating material layer on the substrate to cover a portion of the fin other than the top surface of the dummy gate; removing the dummy gate to expose a portion of the first region in the fin that is enclosed by the dummy gate; and forming a third region having the first conductivity type in the first region by introducing into the first region a second dopant that can impart the first conductivity type, wherein, the portion of the first region other than the third region is the channel region, the channel region separating the second region from the third region and having the second conductivity type, and wherein, the second region is used for providing a first channel control region for controlling the channel region, and the third region functions as a second channel control region for controlling the channel region.