Data recovery methods in multi-state memory after

专利名称：Data recovery methods in multi-state

memory after program fail

发明人：Yan Li申请号：US11304783申请日：20051214

公开号：US20060126393A1公开日：20060615

专利附图：

摘要：A non-volatile memory device includes the ability to recover data in event of aprogram failure without having to maintain a copy of the data until the write is

completed. As the integrity of the data can thus be maintained with having to save a copy,buffers can be freed up for other data or even eliminated, reducing the amount ofcontroller space that needs to devoted data buffering. In exemplary embodiments, thedata is recovered by logically combining the verify data for the (failed) write processmaintained in data latches with the results of one or more read operations to

reconstitute the data. The exemplary embodiments are for memory cells storing multi-state data, both in the format of independent upper page, lower page form, as well as in

2-bit form. This can be accomplished by a state machine and data latches in the senseamp area on the memory, without use of the controller.

申请人：Yan Li

地址：Milpitas CA US

国籍：US

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