Patent ID: 9123694
Filing Date: 2015-09-01
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a first doped active region disposed in a substrate, wherein the first doped active region extends in a first direction; a second doped active region disposed in a substrate, wherein the second doped active region extends in the first direction; a first metal gate disposed over the first doped active region, wherein the first metal gate has a first dimension measured in a second direction different from the first direction; a second metal gate disposed over the first doped active region, wherein the second metal gate has a second dimension measured in the second direction, the first and second dimensions being different; a third metal gate disposed over the second doped active region, wherein the third metal gate has a third dimension measured in the second direction; and a fourth metal gate disposed over the second doped active region, wherein the fourth metal gate has a fourth dimension measured in the second direction, the third and fourth dimensions being different, and wherein the first metal gate and the second metal gate each include a first type work function metal, and wherein the third metal gate and the fourth metal gate each include a second type work function metal that is opposite the first type work function metal.