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.: US13052214Application Date: 2011-03-21
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Publication No.: US08576606B2Publication Date: 2013-11-05
- Inventor: Tetsuji Kunitake , Takashi Shigeoka , Takayuki Tsukamoto , Hironori Wakai , Hisashi Kato
- Applicant: Tetsuji Kunitake , Takashi Shigeoka , Takayuki Tsukamoto , Hironori Wakai , Hisashi Kato
- 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: JP2010-066429 20100323
- Main IPC: G11C11/00
- IPC: G11C11/00

Abstract:
A nonvolatile semiconductor memory device according to an embodiment herein includes a memory cell array. The memory cell array includes memory cells each provided between a first line and a second line and each including a variable resistor. A control circuit applies through the first and second lines a voltage necessary for a forming operation of the memory cell. A current limiting circuit limits a value of a current flowing across the memory cell during the forming operation to a certain limit value. The control circuit repeats an operation of applying the voltage by setting the limit value to a certain value and an operation of changing the limit value from the certain value, until forming of the memory cell is achieved.
Public/Granted literature
- US20110235401A1 NONVOLATILE SEMICONDUCTOR MEMORY DEVICE Public/Granted day:2011-09-29
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