Patent ID: 11917823
Assignee: YANGTZE MEMORY TECHNOLOGIES CO., LTD.
Field: nan (nan)
Classification: CPC H | IPC H

Claim 10:
11. A method for forming a three-dimensional (3D) memory device, comprising:
forming a first opening extending vertically through a dielectric stack above a substrate, the dielectric stack comprising dielectric layers and sacrificial layers interleaving the dielectric layers;
removing parts of the sacrificial layers facing the opening to form a plurality of first recesses;
forming a plurality of first blocking structures along sidewalls and top and bottom surfaces of the plurality of first recesses;
forming a plurality of storage structures over the plurality of first blocking structures in the plurality of first recesses;
removing the plurality of sacrificial layers to form a plurality of second recesses and expose the plurality of first blocking structures; and
forming a plurality of second blocking structures along sidewalls and top and bottom surfaces of the plurality of second recesses, wherein a thickness of each of the plurality of second blocking structures is nominally the same as a thickness of each of the plurality of first blocking structures.