Patent ID: 11956952
Assignee: MONOLITHIC 3D INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 1:
2. A 3D memory device, the device comprising:
a first memory layer comprising a plurality of first vertical memory cells,
a second memory layer comprising a plurality of second vertical memory cells,
wherein said second memory layer is disposed above said first memory layer,
wherein said plurality of first vertical memory cells comprise a horizontal shared first source line and a horizontal shared first drain line,
wherein said plurality of second vertical memory cells comprise a horizontal shared second source line and a horizontal shared second drain line,
wherein at least one of said first vertical memory cells is self-aligned to at least one of said second vertical memory cells, being processed following a same lithography step;

a staircase structure with contacts to said horizontal shared first source line,
wherein said horizontal shared first source line comprises said contacts on both ends of said horizontal shared source first line; and

a vertically-oriented, interdigitated word-line comb wrapped around said first and second vertical memory cells.