Patent ID: 9064889
Filing Date: 2015-06-23
Classification: H01L

Abstract:
1. A semiconductor device having a MISFET, the MISFET comprising: a semiconductor substrate; a gate electrode formed over the semiconductor substrate via a gate insulating film; a first side wall insulating film extending from over a side wall of the gate electrode to over the semiconductor substrate; a first epitaxial semiconductor layer formed on the semiconductor substrate exposed from the first side wall insulating film; and a second side wall insulating film formed over the side wall of the gate electrode via the first side wall insulating film, wherein the first side wall insulating film has a part extending over the side wall of the gate electrode and a part extending over the semiconductor substrate, a part of the first epitaxial semiconductor layer lies over the first side wall insulating film in the part extending over the semiconductor substrate, and a thickness of the first side wall insulating film and the second side wall insulating film in a gate length direction is shorter than a length of the part of the first side wall insulating film in the gate length direction.