Invention Grant
- Patent Title: Nonvolatile semiconductor memory device
- Patent Title (中): 非易失性半导体存储器件
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Application No.: US12725655Application Date: 2010-03-17
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Publication No.: US08228712B2Publication Date: 2012-07-24
- Inventor: Yasuyuki Baba
- Applicant: Yasuyuki Baba
- 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: JP2009-200136 20090831
- Main IPC: G11C11/00
- IPC: G11C11/00

Abstract:
A semiconductor memory device includes a memory cell array configured as an arrangement of memory cells each arranged between a first line and a second line and each including a variable resistor. A control circuit controls a voltage applied to the first line or the second line. A current limiting circuit limits a current flowing through the first line or the second line to a certain upper limit or lower. In a case where a writing operation or an erasing operation to a memory cell is implemented a plural number of times repeatedly, the current limiting circuit sets the upper limit in the writing operation or erasing operation of the p-th time higher than the upper limit in the writing operation or erasing operation of the q-th time (q
Public/Granted literature
- US20110051493A1 NONVOLATILE SEMICONDUCTOR MEMORY DEVICE Public/Granted day:2011-03-03
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