Patent ID: 11892774
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A method, comprising:
exposing a photoresist to a first light-exposure through a first mask, wherein the first mask includes a first stitching region, and a portion of the photoresist corresponding to a portion of the first stitching region is unexposed during the first light-exposure; and
exposing the photoresist to a second light-exposure through a second mask, wherein the second mask includes a second stitching region, a main die region aside the second stitching region and a functional feature partially in the main die region and partially in the second stitching region, and the portion of the photoresist is exposed by the functional feature during the second light-exposure.