Patent ID: 8409958

Claim:
A method of manufacturing a semiconductor device, the method comprising: forming a first gate electrode above a semiconductor substrate; forming a dopant implantation area in the semiconductor substrate by implanting a dopant in the semiconductor substrate, using the first gate electrode as a mask; forming sidewall spacers on the first gate electrode; forming a first recess having a first depth and exposing the dopant implantation area within the first recess at least at a bottom of the first recess by etching the semiconductor substrate, using the first gate electrode and the sidewall spacers as a mask; forming a second recess having a second depth shallower than the first depth and exposing the dopant implantation area within the second recess by removing a part of the dopant implantation area positioned below the sidewall spacers; and forming a source area and a drain area by causing a semiconductor material to grow in the first recess and the second recess, wherein each of the first depth and the second depth is a distance taken from a bottom surface of the first gate electrode towards a bottom of the semiconductor substrate along a direction perpendicular to the bottom surface of the first gate electrode.