发明授权
US07301817B2 Method for programming of multi-state non-volatile memory using smart verify
有权
使用智能验证来编程多状态非易失性存储器的方法
- 专利标题: Method for programming of multi-state non-volatile memory using smart verify
- 专利标题(中): 使用智能验证来编程多状态非易失性存储器的方法
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申请号: US11260658申请日: 2005-10-27
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公开(公告)号: US07301817B2公开(公告)日: 2007-11-27
- 发明人: Yan Li , Long Pham
- 申请人: Yan Li , Long Pham
- 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: G11C16/06
- IPC分类号: G11C16/06
摘要:
In a non-volatile memory, the initiation of program verification is adaptively set so that programming time is decreased. In one approach, non-volatile storage elements are programmed based on a lower page of data to have a voltage threshold (VTH) that falls within a first VTH distribution or a higher, intermediate VTH distribution. Subsequently, the non-volatile storage elements with the first VTH distribution either remain there, or are programmed to a second VTH distribution, based on an upper page of data. The non-volatile storage elements with the intermediate VTH distribution are programmed to third and fourth VTH distributions. The non-volatile storage elements being programmed to the third VTH distribution are specially identified and tracked. Verification of the non-volatile storage elements being programmed to the fourth VTH distribution is initiated after one of the identified non-volatile storage elements transitions to the third VTH distribution from the intermediate VTH distribution.
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