发明授权
- 专利标题: Non-volatile memory and method with memory planes alignment
- 专利标题(中): 非易失性存储器和方法与存储器平面对齐
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申请号: US12239351申请日: 2008-09-26
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公开(公告)号: US07913061B2公开(公告)日: 2011-03-22
- 发明人: Sergey Anatolievich Gorobets , Peter John Smith , Alan David Bennett
- 申请人: Sergey Anatolievich Gorobets , Peter John Smith , Alan David Bennett
- 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: Davis Wright Tremaine LLP
- 主分类号: G06F12/00
- IPC分类号: G06F12/00
摘要:
A non-volatile memory is constituted from a set of memory planes, each having its own set of read/write circuits so that the memory planes can operate in parallel. The memory is further organized into erasable blocks, each for storing a logical group of logical units of data. In updating a logical unit, all versions of a logical unit are maintained in the same plane as the original. Preferably, all versions of a logical unit are aligned within a plane so that they are all serviced by the same set of sensing circuits. In a subsequent garbage collection operation, the latest version of the logical unit need not be retrieved from a different plane or a different set of sensing circuits, otherwise resulting in reduced performance. In one embodiment, any gaps left after alignment are padded by copying latest versions of logical units in sequential order thereto.