Patent ID: 9634133
Date: 2017-04-25
CPC Classifications: H01L

Claim:
1. A method of forming a quantum well device is characterized by the specific formation steps as follows: providing patterned substrate; a buffer layer is formed on the said patterned substrate; perform etching in the said buffer layer to form a fin-like structure; successively deposit a quantum well layer, a barrier layer, a cover layer and a dielectric layer on the buffer layer and surface of the fin-like structure; form a metal layer on the surface of the said dielectric layer; perform etching on the said metal layer and the said dielectric layer to form metal gate electrode and gate dielectric layer form sidewall spacer on both sides of the said gate electrode and said gate dielectric layer; successively etching the said cover layer, the barrier layer and the quantum well layer to form recessed source and drain regions, and the exposed said buffer layer extending to the bottom of the sidewall spacer; forming doped source and drain in the recessed source and drain regions.