Staggered write and verify for phase change memory
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United States of America Patent
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Oct 13, 2015
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app pub date -
Jul 15, 2014
filing date -
Jul 15, 2014
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Abstract
A method for storing a data value in a memory cell is provided. The data value includes one of a first data value and a second data value respectively represented by a first and a second programmable resistance ranges. The method includes, within a write cycle, storing the first data value in the memory cell by applying a first verify operation having a first verify period and a first write operation having a first write period, or storing the second data value in the memory cell by applying a second verify operation having a second verify period longer than the first verify period and a second write operation having a second write period shorter than the first write period. The write cycle is shorter than a sum of the first write period and the second verify period.
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