Invention Grant
- Patent Title: Semiconductor memory device
- Patent Title (中): 半导体存储器件
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Application No.: US14174538Application Date: 2014-02-06
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Publication No.: US08971120B2Publication Date: 2015-03-03
- Inventor: Hiroshi Maejima
- Applicant: Kabushiki Kaisha Toshiba
- Applicant Address: JP Minato-ku
- Assignee: Kabushiki Kaisha Toshiba
- Current Assignee: Kabushiki Kaisha Toshiba
- Current Assignee Address: JP Minato-ku
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2011-194988 20110907
- Main IPC: G11C16/10
- IPC: G11C16/10 ; G11C16/04 ; G11C16/08 ; G11C11/56 ; G11C16/34 ; H01L27/115

Abstract:
According to one embodiment, a semiconductor memory device includes memory cells, word lines, a driver circuit, and a control circuit. The memory cells are stacked above a semiconductor substrate, and each includes a charge accumulation layer and control gate. The word lines are coupled to the control gates. The driver circuit repeats a programming operation to write data in a memory cell coupled to a selected word line. In the programming operation, a first voltage is applied to the selected word line, a second voltage to a first unselected word line, and a third voltage to a second unselected word line. The control circuit steps up the first voltage and steps down the second voltage in repeating the programming.
Public/Granted literature
- US20140153337A1 SEMICONDUCTOR MEMORY DEVICE Public/Granted day:2014-06-05
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