Patent ID: 9024392
Filing Date: 2015-05-05
Classification: G11C,H01L

Abstract:
1. An integrated circuit including fin field effect transistors (FinFETs) thereon, comprising: first and second active fin regions having a first conductivity type and spaced apart from one another; a third active fin region having a second conductivity type that is opposite the first conductivity type; a gate dielectric layer disposed over the first, second, and third active fin regions; and first and second gate electrodes disposed over the first and second active fin regions, respectively, and disposed over the gate dielectric layer, wherein the first and second gate electrodes are electrically coupled together and are electrically separated from the first and second active fin regions by the gate dielectric layer; a third gate electrode disposed over the third active fin region and over the gate dielectric layer, wherein the third gate electrode is electrically separated from the third active fin region by the gate dielectric layer; wherein the first gate electrode is made of a first metal having a first workfunction, the second gate electrode is made of a second metal having a second work function that differs from the first workfunction, and the third gate electrode is a third metal that differs from the first and second metals.