Patent ID: 11869805
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 7:
8. The method of claim 7, wherein said patterning the stacked film layer structure to form through holes comprises:
forming a mask layer on a side of the stacked film layer structure away from the semiconductor structure;
forming a photoresist layer on a side of the mask layer away from the semiconductor structure;
etching the mask layer, the third supporting layer and part of the dielectric layer by taking the photoresist layer as a mask;
etching remaining part of the dielectric layer and part of the third insulation layer by taking the third supporting layer as a mask; and
etching remaining part of the third insulation layer, the second supporting layer, the second insulation layer, the first supporting layer and the first insulation layer by taking the dielectric layer as a mask to form the through holes.