Patent ID: 8207030

Claim:
A method of producing one or more nMOSFET devices and one or more pMOSFET devices on the same semiconductor substrate, the method comprising: forming a first gate on a crystalline Si active area and a second gate on a crystalline Ge active area on a substrate, the Si active area being separate from the Ge active area; forming an amorphous Si layer on top of a crystalline Si layer in the crystalline Si active area; implanting the Ge and Si areas with dopants so as to form source and drain regions; and activating the dopants in the amorphous Si layer and the Ge area simultaneously by annealing the substrate at a temperature and during a time interval suitable for obtaining solid phase epitaxial regrowth of the amorphous Si layer, wherein the amorphous Si layer is formed by subjecting the crystalline Si active area to an amorphization process, wherein the amorphization process comprises implanting the Si active area with Si ions, Ge ions, or impurity ions, wherein the Ge active area is also implanted with the ions in the process of implanting the Si active area so as to form an amorphous Ge layer on top of a crystalline Ge layer.