DETERMINING HEALTH OF A BLOCK OF A NON-VOLATILE MEMORY DEVICE BASED ON A DISTRIBUTION OF THRESHOLD VOLTAGES

Abstract: in some implementations, a controller may perform, on one or more wordlines of a block of a non-volatile memory device, read operations using default threshold voltages associated with two overlapped charge states. the controller may determine, using a machine learning model, a distribution of threshold voltages for the two overlapped charge states based on read errors associated with the threshold voltages. the controller may determine, based on the determined distribution of threshold voltages, a health of the block. the controller may perform a block refresh operation for the block based on the health of the block. the block refresh operation may be performed when the health satisfies a health threshold. the block refresh operation may not be performed when the health does not satisfy the health threshold.

Inventor(s): Pitamber SHUKLA, Chris NORRIE, Igor ZIPER, Srinivas YELISETTI

CPC Classification: G06F11/3409 ({for performance assessment})

Search for rejections for patent application number 20250173236