Patent ID: 7767512
Filing Date: 2010-08-03
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device comprising: preparing a substrate including a first channel of a first conductive type and a second channel of a second conductive type different from the first conductive type; forming a gate insulation layer on the substrate; forming a first conductive layer including a first metal on the gate insulation layer; forming a second conductive layer including a second metal on the first conductive layer formed over the second channel, the second metal being different from the first metal; forming a third conductive layer on the first conductive layer and the second conductive layer; partially removing the third conductive layer by a dry etching process to form third conductive layer patterns on the first conductive layer formed over the first channel and on the second conductive layer formed over the second channel; partially removing the second conductive layer by a wet etching process to form a second conductive layer pattern over the second channel; and partially removing the first conductive layer to form first conductive layer patterns over the first channel and the second channel.