Non-volatile semiconductor memory device
AssigneeKabushiki Kaisha Toshiba
InventorMasanobu Shirakawa
Life of this patent
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Abstract
According to one embodiment, a non-volatile semiconductor memory device comprises a memory cell array and a memory region. The memory cell array has a plurality of physical blocks. Each of the plurality of physical blocks includes a plurality of string units. Each string unit has a plurality of NAND strings that shares a plurality of word lines connected to a plurality of memory cells, respectively. The memory region is disposed to one of the plurality of physical blocks. Each of the plurality of string units configures a first logical block, and when the first logical block is failed, information of the first failed logical block is stored in a first region of the memory region.
Claims10
A memory device comprising:
- a memory cell array including a plurality of blocks, one of the blocks being a unit of an erase operation, the blocks including a first block, the first block including a plurality of memory cells stacked in a first direction crossing a semiconductor substrate, the first block including a plurality of pages, one of the pages being a unit of a read operation or a write operation, the pages including a first page and a second page;
- and
- a controller configured to execute a read operation for the first page when the controller receives an address corresponding to the first page, the controller being configured not to execute a read operation for the second page when the controller receives an address corresponding to the second page and the second page is defective.
A memory device comprising:
- a memory cell array including a plurality of blocks, one of the blocks being a unit of an erase operation, the blocks including a first block, the first block including a plurality of word lines stacked in a first direction crossing a semiconductor substrate, the plurality of word lines including a first word line and a second word line, one of a plurality of memory cells being electrically connected to one of the word lines;
- and
- a controller configured to execute a read operation for a memory cell electrically connected to the first word line when the controller receives address corresponding to the first word line, the controller being configured not to execute a read operation for a memory cell electrically connected to the second word line when the controller receives address corresponding to the second word line and the second word line is defective.
Dependencies are inferred from the claim text.