Patent ID: 9514990
Filing Date: 2016-12-06
CPC Classification: H01L

Claim Text:
1. A method for manufacturing a semiconductor device, the method comprising: forming first fins protruding from a substrate, the substrate including a first region and a second region, and the first fins including silicon-germanium (SiGe); forming a first mask pattern to expose the first fins disposed in the second region, the first mask pattern covering the first fins disposed in the first region; directly oxidizing the exposed first fins in the second region to form second fins in the second region; forming germanium (Ge)-rich layers, each of the germanium (Ge)-rich layers disposed on top and side surfaces of a respective one of the second fins; and forming a gate dielectric pattern and a gate electrode pattern that cover the germanium (Ge)-rich layers on the second fins of the second region and cover the first fins of the first region, wherein portions of the first and second fins under the gate electrode are defined as channel regions.