Invention Grant
- Patent Title: Semiconductor memory device
- Patent Title (中): 半导体存储器件
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Application No.: US13235392Application Date: 2011-09-18
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Publication No.: US08379451B2Publication Date: 2013-02-19
- Inventor: Mario Sako , Takahiro Suzuki
- Applicant: Mario Sako , Takahiro Suzuki
- Applicant Address: JP Tokyo
- Assignee: Kabushiki Kaisha Toshiba
- Current Assignee: Kabushiki Kaisha Toshiba
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2011-068668 20110325
- Main IPC: G11C11/34
- IPC: G11C11/34 ; G11C16/04 ; G11C7/10

Abstract:
According to one embodiment, a semiconductor memory device includes a plurality of memory cells, a logic gate chain, and a counter. The memory cells are capable of retaining data and are associated with the columns. The logic gate chain includes a plurality of logic gates associated with the columns. Each of the logical gates outputs a logical level to a next-stage logical gate in the series connection. The logic level indicates presence or absence of verify-failure in the associated column. The counter counts the number of output times of the logic level indicating the presence of the verify-failure in a final-stage logic gate of the series connection. A content indicated by the logic level output from each of the logic gates is inverted at a boundary of the logic gate associated with the column having the verify-failure in the logic gate chain.
Public/Granted literature
- US20120243320A1 SEMICONDUCTOR MEMORY DEVICE Public/Granted day:2012-09-27
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