Patent ID: 9698266
Date: 2017-07-04
CPC Classifications: H01L

Claim:
1. A method for forming a semiconductor device, the method comprising: forming a first buffer layer on a substrate, the first buffer layer having a first melting point; forming a second buffer layer on the first buffer layer, the second buffer layer having a second melting point, the second melting point greater than the first melting point; performing an annealing process that increases a temperature of the first buffer layer such that the first buffer layer partially liquefies and causes a strain in the second buffer layer to substantially be reduced; wherein the annealing process increases the temperature of the first buffer layer such that the temperature is at least equal to the first melting point and less than the second melting point; cooling the first buffer layer below the first melting point; forming a layer of a first semiconductor material on the second buffer layer; and forming a gate stack on the first semiconductor material.