Patent ID: 9214395
Filing Date: 2015-12-15
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising the steps of: providing a substrate having first type semiconductor regions and second type semiconductor regions, wherein said first type semiconductor region and said second type semiconductor region are provided respectively with at least one gate structure; forming a first epitaxy mask layer conformally on said gate structures and said substrate; removing a part of said first epitaxy mask layer on said first type semiconductor region and forming a first type epitaxial layer in said substrate at both sides of each said gate structure in said first type semiconductor region; forming a second epitaxy mask layer conformally on said gate structures, said first type epitaxy layers and said substrate, wherein said second epitaxy mask layer covers on said first epitaxy mask layer on said second type semiconductor regions; forming a second type epitaxial layer in said substrate at both sides of each said gate structure in said second type semiconductor region; and removing said second epitaxy mask layer.