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

Claim 0:
1. 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 stop structures along sidewalls of the plurality of first recesses;
forming a plurality of storage structures over the plurality of stop structures in the plurality of first recesses;
removing the plurality of sacrificial layers to expose the plurality of stop structures from a plurality of second recesses opposing the plurality of first recesses;
removing the plurality of stop structures to expose the plurality of storage structures;
forming a plurality of blocking structures over the plurality of storage structures in the plurality of second recesses; and
forming a plurality of conductive layers over the plurality of blocking structures in the plurality of second recesses, a vertical dimension of one of the storage structures is nominally identical to a vertical dimension of a corresponding one of the conductive layers.