Patent ID: 11901218
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A method of forming a semiconductor device, the method comprising:
patterning a first region of a semiconductor substrate to form a first plurality of fins in the first region;
patterning a second region of the semiconductor substrate to form a second plurality of fins in the second region, wherein a first width between adjacent fins of the first plurality of fins is larger than a second width between adjacent fins of the second plurality of fins;
depositing a first dielectric material over the first plurality of fins and the second plurality of fins, wherein the first dielectric material spans the first width between the adjacent fins of the first plurality of fins and spans the second width between the adjacent fins of the second plurality of fins;
converting the first dielectric material to a second dielectric material, wherein a first rate of conversion of the first dielectric material between the adjacent fins of the first plurality of fins is higher than a second rate of conversion of the first dielectric material between the adjacent fins of the second plurality of fins.