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

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