Patent ID: 8357580
Filing Date: 2013-01-22
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device comprising: preparing a semiconductor substrate having a semiconductor surface region comprising a first surface region and a second surface region; epitaxially growing a semiconductor region directly on the second surface region; forming a first gate insulation film directly on the first surface region and forming a second gate insulation film on the semiconductor region; forming a first silicon layer above the first gate insulation film, and forming a second silicon layer above the second gate insulation film, an upper surface of the first silicon layer having a height equal to that of the second silicon layer, the first silicon layer having a thickness larger than that of the second silicon layer, and at least one of a gate length and a gate width of the first silicon layer being shorter than the gate length or gate width of the second silicon layer, respectively; and depositing a metal film on the first silicon layer and on the second silicon layer.