Invention Grant
- Patent Title: Semiconductor memory device
- Patent Title (中): 半导体存储器件
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Application No.: US14474307Application Date: 2014-09-02
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Publication No.: US09214238B2Publication Date: 2015-12-15
- Inventor: Takuya Futatsuyama , Masanobu Shirakawa , Kenichi Abe
- Applicant: KABUSHIKI KAISHA TOSHIBA
- Applicant Address: JP Tokyo
- Assignee: Kabushiki Kaisha Toshiba
- Current Assignee: Kabushiki Kaisha Toshiba
- Current Assignee Address: JP Tokyo
- Agency: Patterson & Sheridan, LLP
- Priority: JP2014-051934 20140314
- Main IPC: G11C16/10
- IPC: G11C16/10 ; G11C16/34

Abstract:
A semiconductor memory device includes first to fourth memory cells that are stacked above a semiconductor substrate, first to fourth word lines that are connected to gates of the first to fourth memory cells, respectively, and a row decoder that applies voltages to the first to fourth word lines. The row decoder applies a first programming voltage to the first word line during a write operation performed on the first memory cell, applies the first programming voltage to the second word line during a write operation performed on the second memory cell, applies a second programming voltage to the third word line during a write operation performed on the third memory cell, and applies the second programming voltage to the fourth word line during a write operation performed on the fourth memory cell. The second programming voltage is higher than the first programming voltage.
Public/Granted literature
- US20150262682A1 SEMICONDUCTOR MEMORY DEVICE Public/Granted day:2015-09-17
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