Patent ID: 11908748
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. A method of forming a semiconductor device, comprising:
providing a structure that includes a substrate, a fin protruding from the substrate, an isolation feature surrounding the fin, and a gate structure engaging the fin;
depositing a resist layer covering the fin, the isolation feature, and the gate structure;
performing a first etching process to recess the resist layer below a top surface of the gate structure;
performing a second etching process to further recess the resist layer;
performing a third etching process to remove the resist layer, wherein the first, second, and third etching processes have different etching rates;
recessing the fin; and
forming an epitaxial feature above the fin.