发明授权
- 专利标题: Redundancy system for non-volatile memory
- 专利标题(中): 用于非易失性存储器的冗余系统
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申请号: US13740747申请日: 2013-01-14
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公开(公告)号: US08654598B2公开(公告)日: 2014-02-18
- 发明人: Wlodek Kurjanowicz , Mourad Abdat
- 申请人: Sidense Corp.
- 申请人地址: CA Ottawa, Ontario
- 专利权人: Sidense Corp.
- 当前专利权人: Sidense Corp.
- 当前专利权人地址: CA Ottawa, Ontario
- 代理机构: Borden Ladner Gervais LLP
- 代理商 Shin Hung
- 主分类号: G11C7/00
- IPC分类号: G11C7/00
摘要:
A redundancy scheme for Non-Volatile Memories (NVM) is described. This redundancy scheme provides means for using defective cells in non-volatile memories to increase yield. The algorithm is based on inverting the program data for data being programmed to a cell grouping when a defective cell is detected in the cell grouping. Defective cells are biased to either “1” or “0” logic states, which are effectively preset to store its biased logic state. A data bit to be stored in a defective cell having a logic state that is complementary to the biased logic state of the cell results in the program data being inverted and programmed. An inversion status bit is programmed to indicate the inverted status of the programmed data. During read out, the inversion status bit causes the stored data to be re-inverted into its original program data states.
公开/授权文献
- US20130128679A1 REDUNDANCY SYSTEM FOR NON-VOLATILE MEMORY 公开/授权日:2013-05-23
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