Patent ID: 11956958
Assignee: YANGTZE MEMORY TECHNOLOGIES CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A method for forming a semiconductor device, the semiconductor device comprising a first substrate, a memory stack disposed on the first substrate and a plurality of channel structures each extending through the memory stack, the method comprising:
performing a first implantation on the first substrate to implant a buried material in the first substrate;
forming a doped layer in the first substrate and forming a buried stop layer from the buried material in the first substrate, the memory stack and the buried stop layer being arranged at opposite sides of the doped layer, and the doped layer extending continuously, in a lateral direction, on the buried stop layer; and
removing a portion of the first substrate until being stopped by the buried stop layer.