Patent ID: 11877448
Assignee: YANGTZE MEMORY TECHNOLOGIES CO., LTD.
Field: nan (nan)
Classification: CPC H | IPC H

Claim 19:
20. A method for forming a three-dimensional (3D) memory device, comprising:
forming a peripheral circuit on a first substrate;
forming a plurality of channel structures each extending vertically through a memory stack and a P-type doped semiconductor layer having an N-well above a second substrate;
bonding the first substrate and the second substrate in a face-to-face manner, such that the memory stack is above the peripheral circuit;
removing the second substrate to expose an upper end of each of the plurality of channel structures and the P-type doped semiconductor layer; and
forming a conductive layer on the P-type doped semiconductor layer and in contact with the upper ends of the plurality of channel structures.