Patent ID: 11871573
Assignee: YANGTZE MEMORY TECHNOLOGIES CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 19:
20. A three-dimensional (3D) memory device, comprising:
a memory stack comprising a memory block, the memory block comprising a first memory array structure, a staircase structure, a second memory array structure in a first lateral direction, and a plurality of strings in a second lateral direction perpendicular to the first lateral direction, the staircase structure comprising a staircase zone and a bridge structure adjacent to the staircase zone in the second lateral direction;
a source-select-gate (SSG) cut structure extending in a SSG of the memory stack between adjacent ones of the plurality of strings, the SSG cut structure comprising a first portion of extending in the bridge structure in the first lateral direction, the first portion of the SSG cut structure being between a first portion and a second portion of the bridge structure and between the first portion and a third portion of the bridge structure, wherein the staircase zone comprises:
a pair of staircases conductively connected to first memory cells in a first string in the first and second memory array structures through the first portion of the bridge structure; and
a pair of staircases connected to second memory cells in a second string in a respective one of the first and second memory array structures through respectively the second portion and the third portion of the bridge structure.