Patent ID: 8703595
Filing Date: 2014-04-22
Classification: H01L

Abstract:
1. A method of fabricating a semiconductor device, comprising: forming a first dummy gate and a second dummy gate over a substrate, wherein the first and second dummy gates each extend in a first direction; forming a patterned mask over the first and second dummy gates, the patterned mask exposing a first segment of the first dummy gate and a second segment of the second dummy gate, while covering a third segment of the first dummy gate and a fourth segment of the second dummy gate, wherein the forming the mask is carried out in a manner such that the first and second segments have significantly different lengths, wherein the patterned mask defines an elongate contour that extends in a second direction different from the first direction; replacing the first segment and the second segment with a first metal gate and a second metal gate, respectively, the first and second metal gates containing a first type metal material; and replacing the third segment and the fourth segment with a third metal gate and a fourth metal gate, respectively, the third and fourth metal gates containing a second type metal material different from the first type metal material.