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

Claim 5:
6. The method for manufacturing the capacitor according to claim 1, wherein the substrate to be etched comprises: a second sacrificial layer, a second support layer, a first sacrificial layer and the first support layer being sequentially formed in a direction away from the underlayer; and
the removing, layer by layer, part of the substrate to be etched comprises:
forming first openings in the first support layer, to expose the first sacrificial layer; transferring the first openings in the edge area of the wafer to the first sacrificial layer;
removing, based on the first openings, the first sacrificial layer;

forming second openings in the second support layer, to expose the second sacrificial layer; and
removing, based on the second openings, the second sacrificial layer, the first openings being in one-to-one correspondence with the second openings.