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

Claim 11:
12. A method for forming a three-dimensional (3D) semiconductor device, comprising:
forming a first semiconductor structure, the first semiconductor structure comprising a first substrate and a first device layer formed on the first substrate, wherein forming the first semiconductor structure comprises:
forming a buried stop layer in the first substrate;

forming a second semiconductor structure comprising a second device layer formed on a second substrate;
bonding the first device layer of the first semiconductor structure and the second device layer of the second semiconductor structure to electrically connect the first device layer with the second device layer; and
after electrically connecting the first device layer and the second device layer, removing a portion of the first substrate until being stopped by the buried stop layer.