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

Claim 6:
7. A three-dimensional memory, comprising:
a memory cell array 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 extending vertically above the substrate and comprising a plurality of memory cells that are arranged vertically in series connection;
the plurality of memory cells comprising a first portion and a second portion, a diameter of a channel structure of the first portion of memory cells being smaller than that of the channel structure of the second portion of memory cells; and
a controller configured to transmit a control signal to a voltage controller when a read operation is performed for selected memory cells, the voltage controller applying a pass voltage comprising a first pass voltage and a second pass voltage to non-selected memory cells in response to the control signal, 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.