发明授权
US07876611B2 Compensating for coupling during read operations in non-volatile storage
有权
补偿在非易失性存储器中读取操作期间的耦合
- 专利标题: Compensating for coupling during read operations in non-volatile storage
- 专利标题(中): 补偿在非易失性存储器中读取操作期间的耦合
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申请号: US12188629申请日: 2008-08-08
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公开(公告)号: US07876611B2公开(公告)日: 2011-01-25
- 发明人: Deepanshu Dutta , Jeffrey W. Lutze , Yingda Dong , Henry Chin , Toru Ishigaki
- 申请人: Deepanshu Dutta , Jeffrey W. Lutze , Yingda Dong , Henry Chin , Toru Ishigaki
- 申请人地址: US CA Milpitas
- 专利权人: SanDisk Corporation
- 当前专利权人: SanDisk Corporation
- 当前专利权人地址: US CA Milpitas
- 代理机构: Vierra Magen Marous & DeNiro LLP
- 主分类号: G11C11/34
- IPC分类号: G11C11/34
摘要:
Capacitive coupling from storage elements on adjacent bit lines is compensated by adjusting voltages applied to the adjacent bit lines. An initial rough read is performed to ascertain the data states of the bit line-adjacent storage elements, and during a subsequent fine read, bit line voltages are set based on the ascertained states and the current control gate read voltage which is applied to a selected word line. When the current control gate read voltage corresponds to a lower data state than the ascertained state of an adjacent storage element, a compensating bit line voltage is used. Compensation of coupling from a storage element on an adjacent word line can also be provided by applying different read pass voltages to the adjacent word line, and obtaining read data using a particular read pass voltage which is identified based on a data state of the word line-adjacent storage element.
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