发明申请
US20100329010A1 READ OPERATION FOR MEMORY WITH COMPENSATION FOR COUPLING BASED ON WRITE-ERASE CYCLES
有权
用于基于写删除循环的耦合补偿的存储器的读操作
- 专利标题: READ OPERATION FOR MEMORY WITH COMPENSATION FOR COUPLING BASED ON WRITE-ERASE CYCLES
- 专利标题(中): 用于基于写删除循环的耦合补偿的存储器的读操作
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申请号: US12490550申请日: 2009-06-24
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公开(公告)号: US20100329010A1公开(公告)日: 2010-12-30
- 发明人: Yingda Dong
- 申请人: Yingda Dong
- 主分类号: G11C16/04
- IPC分类号: G11C16/04
摘要:
A read operation for non-storage elements compensates for floating gate-to-floating gate coupling and effects of program-erase cycles. During programming of a word line WLn+1, the threshold voltages of previously-programmed storage elements on WLn are increased due to coupling. To compensate for the increase, during a subsequent read operation of WLn, different sets of pass voltages are applied to WLn+1 for each control gate read voltage which is applied to WLn. The pass voltages vary in each different set so that they are a function of the control gate read voltage which is applied to WLn. The pass voltages may also be a function of a number of program-erase cycles. A higher amount of compensation is provided by increasing the pass voltages as the number of program-erase cycles increases.
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