Patent ID: 11862260
Assignee: SANDISK TECHNOLOGIES, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 17:
18. A method for detecting read disturb in an open memory block comprising one or more wordlines containing data and a plurality of erased wordlines, the method comprising:
applying a pass-through voltage to each wordline that contains data in the open memory block;
dividing the plurality of erased wordlines into a first group of one or more erased wordlines and a second group of one or more erased wordlines;
performing a first audit verify stage comprising:
applying an audit verify voltage to each erased wordline in the first group;
applying a non-verify voltage to each erased wordline in the second group
determining a first bit count indicative of a read disturb level of the erased wordlines in the first group;
determining whether the first bit count exceeds a first threshold value; and
determining whether to continue operation of the open memory block or proceed to a second audit verify stage based at least in part on whether the first bit count exceeds the first threshold value.