Patent ID: 8822280
Filing Date: 2014-09-02
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device comprising: ion implanting a first impurity of a first conduction type in a first region and a second region of a semiconductor substrate to form a first impurity layer in the first region and the second region; epitaxially growing a semiconductor layer above the semiconductor substrate after ion implanting the first impurity; forming above the semiconductor layer a mask exposing the first region and covering the second region; removing partially the semiconductor layer in the first region by using the mask; removing the mask after removing partially the semiconductor layer; forming a first gate insulating film above the semiconductor layer after removing the mask; forming a first gate electrode on the first gate insulating film in the first region and a second gate electrode above the first gate insulating film in the second region; forming a first source region and a first drain region in the semiconductor layer in the first region; and forming a second source region and a second drain region in the semiconductor layer in the second region.