Patent ID: 11860550
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 12:
13. A method, comprising:
forming a first sacrificial structure and a second sacrificial structure on a substrate;
forming first and second spacers on opposing sidewalls of the first sacrificial structure, wherein the second spacer is between the first and second sacrificial structures;
forming a third spacer on a sidewall of the second sacrificial structure, wherein the third spacer is between the first and second sacrificial structures, and wherein a portion of the substrate is exposed between the second and third spacers;
forming an opening in a photoresist layer on the first and second sacrificial structures, wherein the opening is above the second and third spacers and has a width greater than a width of the portion of the substrate;
forming a metal structure in the opening; and
forming, on the metal structure, a capping layer with a bottom surface coplanar with a top surface of the second spacer.