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System for verifying non-volatile storage using different voltages

  • US 7,457,163 B2
  • Filed: 06/01/2006
  • Issued: 11/25/2008
  • Est. Priority Date: 06/01/2006
  • Status: Active Grant
First Claim
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1. A non-volatile storage system, comprising:

  • a group of connected non-volatile storage elements; and

    a managing circuit in communication with said group of connected non-volatile storage elements, said managing circuit applies a particular voltage to a particular non-volatile storage element of said group, while applying said particular voltage to said particular non-volatile storage element said managing circuit applies a first voltage to a first set of one or more non-volatile storage elements of said group that have already been subjected to one or more programming processes since a last erase of said group and a second voltage to a second set of two or more non-volatile storage elements of said group that have not been subjected to a programming process since erasing said group, said managing circuit senses a condition related to said particular non-volatile storage element and said particular voltage as part of a verify operation during a programming processes for said particular non-volatile storage element, said managing circuit performs a read process after said programming process, said read process includes said managing circuit applying a voltage other then said first voltage to said first set of one or more non-volatile storage elements or applying a voltage other then said second voltage to said second set of one or more non-volatile storage elements.

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