Patent ID: 11864379
Assignee: YANGTZE MEMORY TECHNOLOGIES CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A control method of a three-dimensional memory, the three-dimensional memory comprising a first deck and a second deck that are stacked in a vertical direction of a substrate, the first deck and the second deck each comprising a plurality of memory strings, each memory string comprising a plurality of memory cells, the plurality of memory cells comprising a first portion and a second portion, wherein a diameter of a channel structure corresponding to the first portion of memory cells is smaller than that of the channel structure corresponding to the second portion of memory cells, the method comprising:
performing a read operation for selected memory cells which are in at least one of the first deck or the second deck; and
applying a pass voltage to non-selected memory cells other than the selected memory cells in the first deck and the second deck, the pass voltage comprising a first pass voltage and a second pass voltage, the first pass voltage being lower than the second pass voltage, wherein the first pass voltage is applied to first non-selected memory cells in the first portion, and the second pass voltage is applied to second non-selected memory cells in the second portion.