发明名称 |
Flash memory device with physical cell value deterioration accommodation and methods useful in conjunction therewith |
摘要 |
A method for determining thresholds useful for converting cell physical levels into cell logical values in an array of digital memory cells storing physical levels which diminish over time, the method comprising determining extent of deterioration of the physical levels and determining thresholds accordingly for at least an individual cell in said array; and reading the individual cell including reading a physical level in the cell and converting the physical level into a logical value using the thresholds, wherein the determining comprises storing predefined physical levels rather than data-determined physical levels in each of a plurality of cells and computing extent of deterioration by determining deterioration of the predefined physical levels.
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申请公布号 |
US8321625(B2) |
申请公布日期 |
2012.11.27 |
申请号 |
US20080667042 |
申请日期 |
2008.09.17 |
申请人 |
WEINGARTEN HANAN;LEVY SHMUEL;KATZ MICHAEL;DENSBITS TECHNOLOGIES LTD. |
发明人 |
WEINGARTEN HANAN;LEVY SHMUEL;KATZ MICHAEL |
分类号 |
G06F12/02 |
主分类号 |
G06F12/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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