Patent ID: 11950419
Assignee: YANGTZE MEMORY TECHNOLOGIES CO., LTD.
Field: nan (nan)
Classification: CPC H | IPC H

Claim 0:
1. A three-dimensional (3D) memory device, comprising a staircase, a plurality of groups of support structures, and a fourth support structure between adjacent groups of support structures through the staircase, wherein:
the plurality of groups of support structures are arranged in a first direction,
each of the groups of support structures comprises three support structures, wherein projections of the three support structures form a triangular shape in a plane parallel to the first direction, and
in a second direction perpendicular to the first direction, a distance between the fourth support structure and one of the three support structures in one of the adjacent groups is greater than or equal to half of a critical dimension of the fourth support structure and less than or equal to the critical dimension of the fourth support structure.