Patent ID: 11862461
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for forming a semiconductor structure, comprising:
providing a base, wherein the base comprises a first doped area and a second doped area, and an isolation structure is provided between the first doped area and the second doped area;
performing nitridation treatment on the first doped area and the second doped area; and
performing oxidation treatment on the first doped area and the second doped area subjected to the nitridation treatment, to form a first gate oxide layer and a second gate oxide layer respectively,
wherein providing the base comprises:
providing a substrate;
forming the isolation structure on the substrate; and
doping the substrate on which the isolation structure is formed, to form the first doped area on one side of the isolation structure and to form the second doped area on another side of the isolation structure,

wherein the substrate corresponding to the first doped area is a first substrate, and the substrate corresponding to the second doped area is a second substrate and a germanium-silicon substrate is formed on the second substrate,
wherein forming the germanium-silicon substrate on the second substrate comprises:
forming a patterned first mask layer on the first substrate and the second substrate, wherein the patterned first mask layer exposes a surface of the second substrate;
forming the germanium-silicon substrate on the surface of the second substrate through epitaxial growth or deposition; and
removing the germanium-silicon substrate on the first substrate and the patterned first mask layer.