Patent ID: 9627266
Date: 2017-04-18
CPC Classifications: H01L

Claim:
1. A method of forming an active device on a semiconductor wafer, the method comprising the steps of: forming a plurality of semiconductor fins on at least a portion of a semiconductor substrate; forming a first dielectric layer on at least a portion of the semiconductor substrate, the first dielectric layer filling gaps between adjacent fins; forming a plurality of first gate structures on an upper surface of the first dielectric layer; forming a channel region on the first dielectric layer and under at least a portion of the first gate structures, the channel region comprising a first crystalline semiconductor material; forming source and drain epitaxy regions on an upper surface of the first dielectric layer and between adjacent first gate structures, the source and rain regions being spaced laterally from one another; and replacing the channel region with a second crystalline semiconductor material after high-temperature processing used in fabricating the active device has been completed.