Patent ID: 11908939
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A method comprising:
forming a first fin and a second fin on a substrate, the first fin being covered by a first hard mask layer;
forming a dielectric layer over the first fin and the second fin such that the dielectric layer covers the first fin and the second fin;
removing a first portion of the dielectric layer to expose the first hard mask layer, wherein the dielectric layer covers the second fin after the removing of the first portion of the dielectric layer, wherein the removing of the first portion of the dielectric layer to expose the first hard mask layer includes forming a trench in the dielectric layer that expose a first portion of the first fin while a second portion of the first fin is covered by a second portion of the dielectric layer; and
after removing the first portion of the dielectric layer, removing at least a portion of the first fin.