Patent ID: 6593618
Filing Date: 2003-07-15
Classification: H01L

Abstract:
A semiconductor device comprising:a silicon substrate; a gate insulating film formed on a surface of the silicon substrate; a gate electrode formed on the gate insulating film; a first side wall film formed on a side surface of the gate electrode; an elevated region formed by epitaxial growth of silicon on the surface of the silicon substrate; a second side wall film formed on the first side wall film, being made of different material from the first side wall film and separated from the surface of the silicon substrate by the elevated region; and a source region and a drain region formed in the silicon substrate and having a same conductive type with the elevated region, wherein the elevated region fills between the silicon substrate and the second side wall film to directly contact with a side surface of the first side wall film and a side surface of the second side wall film, and an angle between a side end plane of the elevated region contacted on the side surface of the first side wall film and the surface of the silicon substrate is a substantially obtuse angle.