Patent ID: 11894226
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. The method for manufacturing the semiconductor device according to claim 1, wherein the first exposure and the first development on the first portion of the protective layer to form the plurality of grooves further comprises a step of:
placing the third photomask above the protective layer, wherein the third photomask comprises a plurality of third light-transmitting regions formed corresponding to the plurality of chip areas, and each of the plurality of third light-transmitting regions includes a plurality of first light-transmitting regions; and
wherein the third photomask is used to expose the protective layer followed by a third development; and
wherein a thickness of the protective layer in the plurality of third light-transmitting regions is less than the initial thickness of the protective layer.