Invention Grant
US07907458B2 Non-volatile memory with redundancy data buffered in remote buffer circuits
有权
具有缓冲在远程缓冲电路中的冗余数据的非易失性存储器
- Patent Title: Non-volatile memory with redundancy data buffered in remote buffer circuits
- Patent Title (中): 具有缓冲在远程缓冲电路中的冗余数据的非易失性存储器
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Application No.: US12499757Application Date: 2009-07-08
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Publication No.: US07907458B2Publication Date: 2011-03-15
- Inventor: Raul-Adrian Cernea
- Applicant: Raul-Adrian Cernea
- Applicant Address: US CA Milpitas
- Assignee: SanDisk Corporation
- Current Assignee: SanDisk Corporation
- Current Assignee Address: US CA Milpitas
- Agency: Davis Wright Tremaine LLP
- Main IPC: G11C7/00
- IPC: G11C7/00

Abstract:
A memory has defective locations in its user portion replaceable by redundant locations in a redundant portion. Data latches in column circuits of user and redundant portions allow data sensed from or to be written to a memory to be exchanged with a data bus. A remote redundancy scheme has the redundant data available from a central buffer accessible by any number of column circuits. Redundant data buffer circuits enable bus exchange with data from the user data latches except for defective locations when data are taken from the central buffer. In this way only addressing for the user portion is used for bus exchange. Also, accessibility to the redundant data will not be restricted by the locations of the column circuits relative to the redundant data latches and the buffered redundant data can be accessed at a finer granularity than that imposed by the column circuits.
Public/Granted literature
- US20090273986A1 Non-Volatile Memory With Redundancy Data Buffered in Remote Buffer Circuits Public/Granted day:2009-11-05
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