Patent ID: 11955338
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 0:
1. A method, comprising:
providing a substrate having a top surface, wherein a first hard mask layer is formed over the top surface and a second hard mask layer is formed over the first hard mask layer;
forming a first pattern in the second hard mask layer, wherein the first pattern includes a first mandrel oriented along a first direction and a second mandrel oriented in a second direction different from the first direction, wherein the first mandrel has a top surface, a first sidewall, and a second sidewall opposite to the first sidewall;
depositing a material layer towards the first mandrel and the second mandrel such that the material layer is formed on the top surface and the first sidewall but not the second sidewall;
removing portions of the material layer from the top surface of the first mandrel, wherein at least a portion of the material layer on the first sidewall remains; and
removing the first mandrel but not the second mandrel and the portion of the material layer remaining on the first sidewall.