Patent ID: 7157337

Claim:
A method of manufacturing a semiconductor device with a substrate and a semiconductor body the semiconductor device including a first field effect transistor with a first source, drain and channel region of a first conductivity type and a first gate electrode including a first conductor the first conductor is separated from the channel region by a dielectric layer, and the semiconductor device further including a second field effect transistor with a second source, drain and channel region of a second conductivity type, opposite to the first conductivity type, and a second gate electrode includes a second conductor that is different from the first conductor, and the second conductor is separated from the channel region by a dielectric layer, the method comprising: wherein to form the gate electrodes a first conductor layer is applied to the semiconductor body provided with the dielectric layer, which first conductor layer is subsequently removed outside the first channel region, after the first conductor layer is removed, a second conductor layer is applied to the semiconductor body, and wherein, before the first conductor layer is applied, an intermediate layer is provided on the dielectric layer, the intermediate layer is provided with a further intermediate layer, the material of the further intermediate layer being selectively etchable with respect to the material of the intermediate layer, wherein the intermediate layer is made of a material that is selectively etchable with respect to the dielectric layer, and before the first conductor layer is provided, the intermediate layer is removed at the location of the first channel region, and after the first conductor layer has been provided and removed outside the first channel region, and before the second conductor layer is provided, the intermediate layer is removed at the location of the second channel region, and wherein the intermediate layer is locally removed by etching in areas defined by a photoresist mask.