Patent ID: 11889676
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. The method for manufacturing the capacitor according to claim 10, wherein the exposing a portion, for dies in the central area, of the second isolation layer through a photoetching process, and etching the second isolation layer, to form a second isolation side wall pattern comprises:
coating the second isolation layer with a second negative photoresist, exposing the edge area of the wafer through a blank mask, and retaining a portion, in the edge area, of the second negative photoresist after development; removing portions, in the central area, of the top surfaces and the bottom surfaces of the second isolation layer through an etching process, and retaining the side walls, to form the second isolation side wall pattern.