Patent ID: 8299564
Filing Date: 2012-10-30
Classification: H01L

Abstract:
1. A method for forming a device of an integrated circuit, comprising: obtaining a substrate formed at least in part of silicon; forming shallow-trench isolation structures in the substrate; forming a dielectric gate layer above the substrate; forming a conductive gate layer above the dielectric gate layer; forming a first hard mask layer above the conductive gate layer; depositing a second hard mask layer above the first hard mask layer, wherein: depositing and patterning a masking layer, wherein the masking layer after patterning leaves exposed the first source region, the first drain region, the second source region, and the second drain region; performing at least one etch, wherein the at least one etch includes: forming a silicon germanium film in the first recesses and the second recesses, wherein the silicon germanium film in the second recesses is thicker than the silicon germanium film in the first recesses.