Invention Grant
- Patent Title: Semiconductor memory device
- Patent Title (中): 半导体存储器件
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Application No.: US12537628Application Date: 2009-08-07
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Publication No.: US07990753B2Publication Date: 2011-08-02
- Inventor: Ryosuke Matsuo
- Applicant: Ryosuke Matsuo
- 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: JP2008-205102 20080808
- Main IPC: G11C11/00
- IPC: G11C11/00

Abstract:
A nonvolatile semiconductor memory device having a plurality of unit cell arrays having memory cells each containing a first wiring and a second wiring intersecting each other, and a variable resistive element arranged at each intersection of said first wiring and said second wiring and electrically rewritable to nonvolatilely store a resistance value as data, characterized by comprising: a control circuit for applying a predetermined voltage to said memory cell in selectively accessing said memory cell; wherein said control circuit accumulates a predetermined electric charge in a parasitic capacitance of said memory cell included in a first unit cell array that is said specific unit cell array and not accessed at the first time, while on the other hand, accumulates a predetermined electric charge in a parasitic capacitance of said memory cell included in a second unit cell array that is said specific unit cell array other than said first unit cell array and not accessed at the second time after the passage of a predetermined time from said first time.
Public/Granted literature
- US20100034012A1 SEMICONDUCTOR MEMORY DEVICE Public/Granted day:2010-02-11
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