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

Claim 15:
16. The 3D memory device of claim 15, wherein
the pair of staircases conductively connected to respective memory cells in the first string in the first and second memory array structures comprise a first staircase and a second staircase facing each other along a first lateral direction;
the pair of staircases respectively connected to the respective memory cells in the second string in the respective one of the first and second memory array structures comprise, in the first lateral direction, a third staircase facing away from the first staircase and a fourth staircase facing away from the second staircase; and
the pair of staircases respectively connected to the second memory cells in the plurality of third strings in a respective one of the first and second memory array structures comprise, in the first lateral direction, a fifth staircase facing the third staircase and a sixth staircase facing the fourth staircase.