Patent ID: 6291279
Filing Date: 2001-09-18
Classification: H01L

Abstract:
A method for forming metal-oxide semiconductor (MOS) transistors with a plurality of different types on a semiconductor wafer, the semiconductor wafer comprising a substrate, the method comprising:simultaneously forming at least a first gate of a first type MOS transistor and at least a second gate of a second type MOS transistor on the substrate, the first gate and the second gate both comprising a gate dielectric layer, a polysilicon layer, a first silicide layer, and a cap layer in ascending order;removing the cap layer and the first silicide layer from the first gate;forming a spacer around each gate, completing the formation of the second type MOS transistor; andforming a second silicide layer on the surface of the substrate adjacent to the first gate and on the surface of the polysilicon layer of the first gate so as to complete the formation of the first type MOS transistor.