Patent ID: 8748991
Filing Date: 2014-06-10
Classification: H01L

Abstract:
1. A method of forming a semiconductor structure having an n-type field effect transistor including a first patterned material stack and a p-type field effect transistor including a second patterned material stack, the method comprising: providing a semiconductor substrate, the first patterned material stack formed over a first region of the substrate and the second patterned material stack formed over a second region of the substrate; forming an interface preparation layer in the first and second patterned material stacks; forming a metal nitride layer on the interface preparation layer of only the first patterned material stack; forming a high-k dielectric layer, having a high dielectric constant greater than approximately 3.9, on the metal nitride layer of the first patterned material stack, and on the interface preparation layer of the second patterned material stack; forming a Ge material layer on the high-k dielectric of both the first and second patterned material stacks; and forming a conductive electrode layer above the Ge material layer of both the first and second patterned material stacks.