Patent ID: 11864388
Assignee: YANGTZE MEMORY TECHNOLOGIES CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A semiconductor device, comprising:
gate layers and insulating layers that are parallel to each other and stacked alternatingly along a first direction and form a stack;
an array of channel structures being formed in an array region of the stack;
a first staircase formed at a first section in a connection region of the stack, the connection region and the array region arranged in a second direction perpendicular to the first direction;
a second staircase formed at a second section in the connection region of the stack; and
first contact structures formed on the first staircase and being connected to the gate layers at the first section in the connection region of the stack, a first one and a second one of the first contact structures neighboring to each other in the second direction and having different lengths extending in the first direction, the first one and a third one of the first contact structures neighboring to each other in a third direction perpendicular to the second direction and the first direction and having different lengths extending in the first direction,
wherein the first one and a fourth one of the first contact structures neighbor to each other in a fourth direction perpendicular to the second direction and the first direction and opposite to the third direction, and have different lengths extending in the first direction.