发明授权
US07440323B2 Reducing program disturb in non-volatile memory using multiple boosting modes
有权
使用多种升压模式减少非易失性存储器中的程序干扰
- 专利标题: Reducing program disturb in non-volatile memory using multiple boosting modes
- 专利标题(中): 使用多种升压模式减少非易失性存储器中的程序干扰
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申请号: US11555850申请日: 2006-11-02
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公开(公告)号: US07440323B2公开(公告)日: 2008-10-21
- 发明人: Jeffrey W. Lutze , Yingda Dong
- 申请人: Jeffrey W. Lutze , Yingda Dong
- 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 Marcus & DeNiro LLP
- 主分类号: G11C16/04
- IPC分类号: G11C16/04
摘要:
A method for operating a non-volatile storage system which reduces program disturb. Multiple boosting modes are implemented while programming non-volatile storage. For example, self-boosting, local self-boosting, erased area self-boosting and revised erased area self-boosting may be used. One or more switching criteria are used to determine when to switch to a different boosting mode. The boosting mode may be used to prevent program disturb in unselected NAND strings while storage elements are being programmed in selected NAND strings. By switching boosting modes, an optimal boosting mode can be used as conditions change. The boosting mode can be switched based on various criteria such as program pulse number, program pulse amplitude, program pass number, the position of a selected word line, whether coarse or fine programming is used, whether a storage element reaches a program condition and/or a number of program cycles of the non-volatile storage device.