Patent ID: 11876054
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 15:
16. A method of forming an overlay mark, the method comprising:
forming a first feature comprising a plurality of first segments extending in a first direction a first distance from a substrate;
forming a second feature comprising a plurality of second segments extending in a second direction, different from the first direction, a second distance from the substrate; and
forming a third feature a third distance from the substrate, wherein forming the third feature comprises:
forming a plurality of third segments extending along the second direction, wherein the plurality of third segments is offset from the plurality of second segments and the plurality of first segments, and the plurality of third segments is arranged in an alternating fashion with the plurality of second segments in a plan view.