Apparatus and method of performing erase and erase verify operations

Apparatus and method of performing erase and erase verify operations

An example method includes, performing a first erase verify on a first set of memory cells of a portion of an array of memory cells, performing a second erase verify on a second set of memory cells of the portion of the array, applying a first erase voltage pulse concurrently to each memory cell in...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Rori, Fulvio, Cerafogli, Chiara
Format: Patent
Sprache:eng
Schlagworte:
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PHYSICS
STATIC STORES
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Beschreibung
Zusammenfassung:An example method includes, performing a first erase verify on a first set of memory cells of a portion of an array of memory cells, performing a second erase verify on a second set of memory cells of the portion of the array, applying a first erase voltage pulse concurrently to each memory cell in the portion of the array if the first set fails the first erase verify and if the second set fails the second erase verify, and applying a second erase voltage pulse concurrently to each memory cell in the portion of the array if the first set passes the first erase verify and if the second set fails the second erase verify. The second erase voltage pulse is different than the first erase voltage pulse.