Patent ID: 11862558
Assignee: YANGTZE MEMORY TECHNOLOGIES CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. The method of claim 10, wherein the forming the first staircase in the first staircase region of the connection region comprises:
removing one or more of the sacrificial word line layers and the insulating layers in the first staircase region of the connection region;
shaping at least one of the sacrificial word line layers and the insulating layers in the first staircase region to form a first stair, the first stair having a tread with a first edge profile and a first step-down direction (−X direction), the first stair dividing the first staircase region into a first section and a second section;
shaping at least one of the sacrificial word line layers and the insulating layers in the first staircase region to form stairs with a second step-down direction (Y direction); and
performing a first patterning process repetitively on the sacrificial word line layers and the insulating layers in the first staircase region to form the first staircase.