Patent ID: 9252058
Filing Date: 2016-02-02
CPC Classification: H01L

Claim Text:
1. A method of fabricating a semiconductor device comprising: providing a substrate and a first active fin and a second active fin on the substrate; forming first source and drain regions in the first active fin and second source and drain regions in the second active fin; forming a first gate insulating film on the first active fin and a second gate insulating film on the second active fin; forming a first gate material on the first gate insulating film and a second gate material on the second gate insulating film, wherein each of the first gate material and the second gate material has a first work function; forming a first mask film on the second gate material to expose the first gate material and cover the second gate material; and performing a first isotropic doping process such that the first gate material has a second work function different from the first work function and the second gate material has the first work function, wherein the first source and drain regions and the second source and drain regions are of a same conductivity.