Patent ID: 9117675
Filing Date: 2015-08-25
Classification: H01L

Abstract:
1. A semiconductor device production method comprising: forming a first protection film on a semiconductor substrate; forming a first resist pattern, which has an opening portion defining a well region in a surface of the semiconductor substrate, on the first protection film; implanting a first p-type impurity ion into the well region of the semiconductor substrate using the first resist pattern as a mask, and the well region being p-type; implanting a first impurity ion into the well region of the semiconductor substrate using the first resist pattern as a mask; removing the first resist pattern; removing the first protection film; forming a second protection film on the semiconductor substrate after the removing of the first protection film; forming a second resist pattern which has an opening portion defining a channel region in the well region of the semiconductor substrate, on the second protection film; implanting a second impurity ion into the channel region of the semiconductor substrate using the second resist pattern as a mask; implanting a second p-type impurity ion into the channel region of the semiconductor substrate using the second resist pattern as a mask, after the implanting of the second impurity ion, and the channel region being p-type; removing the second resist pattern; removing the second protection film and growing a semiconductor layer epitaxially on the semiconductor substrate, after the removing of the second resist pattern.