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Multi-state memory

  • US 7,457,162 B2
  • Filed: 10/05/2007
  • Issued: 11/25/2008
  • Est. Priority Date: 08/07/1997
  • Status: Expired due to Fees
First Claim
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1. A method of programming a multi-state memory having a plurality of non-volatile memory cells, each for storing a plurality of multi-states and organized into an array of rows, and columns, and cell operating circuitry including sense circuitry, wherein one or more selected cells along a row are capable of being read simultaneously, and write circuitry, the method comprising:

  • selecting one or more memory cells in a row for the concurrent writing of a respective target state from said multi-states; and

    concurrently applying one or more programming pulses to said selected memory cells, wherein the amplitude of the initial pulse of said concurrently applied pulses is determined on a cell by cell basis for each of the selected memory cells based on the target state to which the respective selected memory cell is to be written.

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