Patent ID: 8030708
Filing Date: 2011-10-04
Classification: H01L

Abstract:
1. An insulated gate field-effect transistor having: a semiconductor substrate; a channel region in the semiconductor substrate; a gate insulating film on the substrate above the channel region; a gate electrode above the channel region and above the gate insulating film; two first epitaxial growth layers on the substrate; a sidewall spacer comprising a first layer and a second layer (1) a bottom surface of the first layer on a portion of the upper surface of the first epitaxial growth layers, (2) an upper surface of the first layer opposite of the bottom surface of the first layer, (3) a first side surface of the first layer next to the gate electrode and (4) a second side surface of the first layer located opposite of the first side surface (5) a first side surface of the second layer adjacent the second side surface of the first layer, (6) a second side surface of the second layer located opposite of the first side surface of the second layer, and (7) a bottom surface of the second layer on the upper surface of the first layer; and two source/drain regions in the form of two second epitaxial growth layers respectively on the first epitaxial growth layers and adjacent to the second side surface of the second layer, wherein,