Patent ID: 11929401
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  C | IPC C  H

Claim 0:
1. A method comprising:
forming a fin from a substrate;
forming a gate structure over the fin;
etching a source/drain recess on a side of the gate structure;
performing a smoothing process, the smoothing process comprising:
supplying hydrogen gas to a surface of the source/drain recess; and
heating the source/drain recess, wherein during heating the source/drain recess a metal layer covers a pedestal, the pedestal supporting the substrate;

following the smoothing process, performing a radical treatment process to the source/drain recess;
moving the source/drain recess to a deposition chamber; and
growing an epitaxial source/drain region in the source/drain recess.