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Sensing time control device and method

  • US 6,304,486 B1
  • Filed: 12/20/1999
  • Issued: 10/16/2001
  • Est. Priority Date: 12/20/1999
  • Status: Expired due to Term
First Claim
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1. A method of performing a program verification operation comprising:

  • programming a reference memory cell, the reference memory cell corresponding to a page in a memory cell block of a NAND type flash memory, the memory cell block comprising a plurality of pages, and one reference memory cell being provided for each page;

    programming a memory cell on the same page as the programmed reference memory cell;

    generating a set signal using a content of the reference memory cell; and

    using the set signal to initiate the program verification operation for the memory cell.

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