Patent ID: 11923360
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A method for forming a semiconductor device, comprising:
forming a pair of semiconductor fins extending upwardly from a substrate;
forming a dummy fin structure extending upwardly above the substrate and laterally between the pair of semiconductor fins;
forming a gate structure extending across the pair of semiconductor fins and the dummy fin structure;
forming a plurality of source/drain structures above the pair of semiconductor fins and on either side of the gate structure;
forming a silicon-free metal oxide layer extending upwardly from the dummy fin structure; and
forming a silicon-doped metal oxide layer over the dummy fin structure and laterally surrounded by the silicon-free metal oxide layer, wherein the silicon-free metal oxide layer is in a crystalline state and the silicon-doped metal oxide layer is in an amorphous state.