Patent ID: 11968832
Assignee: YANGTZE MEMORY TECHNOLOGIES CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for forming a memory device, comprising:
forming a plurality of dielectric stacks stacked on one another over a substrate to create a multiple-stack staircase structure, wherein each one of the plurality of dielectric stacks comprises a plurality of dielectric pairs arranged along a direction perpendicular to a top surface of the substrate;
forming a filling structure over the multiple-stack staircase structure;
forming a semiconductor channel extending through the multiple-stack staircase structure, wherein the semiconductor channel comprises unaligned sidewall surfaces; and
forming a supporting pillar extending through at least one of the multiple-stack staircase structure and the filling structure, wherein the supporting pillar comprises aligned sidewall surfaces.