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

Claim 16:
17. A method for forming a memory device, comprising:
forming a first dielectric stack of a plurality of dielectric stacks, wherein each one of the plurality of dielectric stacks comprises a plurality of first material layers and second material layers alternatingly arranged;
forming a first semiconductor sub-channel in the first dielectric stack of the plurality of dielectric stacks;
forming a second dielectric stack of the plurality of dielectric stacks over the first dielectric stack, wherein a multiple-dielectric-stack structure comprises the first dielectric stack and the second dielectric stack;
forming a second semiconductor sub-channel in the second dielectric stack of the plurality of dielectric stacks, wherein the second semiconductor sub-channel is connected with the first semiconductor sub-channel; and
patterning the multiple-dielectric-stack structure to form a multiple-stack staircase structure wherein the patterning the multiple-dielectric-stack structure comprises a single staircase-forming patterning process.