Intel Ndtm US LLC

Kevin K Liou

Kristopher H Gaewsky

For NAND devices having a zero voltage program state as a result of a preconditioning operation, detecting the status of the zero voltage program state is important for customers to quickly validate their component and SSD flows to improve NAND retention and reliability after assembly and die level re-work. A zero voltage program state detection operation quickly determines the validity of the zero voltage program state of a NAND page of a NAND device. The detection operation includes reading a NAND page with reference voltages that delimit a predetermined acceptable range of voltage levels below and above a zero threshold voltage. If NAND memory cells having threshold voltage levels that fall below or above the acceptable voltage levels exceed a predetermined failed bytes limit for the NAND page, the zero voltage program state is invalid.

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Rancho Cordova, CA, United States of America

Kevin K Liou