Invention Grant
- Patent Title: Semiconductor memory device
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Application No.: US15261647Application Date: 2016-09-09
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Publication No.: US09640265B1Publication Date: 2017-05-02
- Inventor: Mitsuaki Honma
- Applicant: KABUSHIKI KAISHA TOSHIBA
- Applicant Address: JP Tokyo
- Assignee: KABUSHIKI KAISHA TOSHIBA
- Current Assignee: KABUSHIKI KAISHA TOSHIBA
- Current Assignee Address: JP Tokyo
- Agency: Holtz, Holtz & Volek PC
- Priority: JP2016-049720 20160314
- Main IPC: G11C16/04
- IPC: G11C16/04 ; G11C16/12 ; G11C16/34 ; G11C11/56

Abstract:
According to one embodiment, the semiconductor memory device includes a first memory cell and a word line. The first memory cell is capable of storing two or more bits of data. The word line is coupled with the first memory cell. a write operation repeat a program loop. The program loop includes a program operation and a verification operation. A program voltage is applied to the word line in the program operation. The write operation includes a first program loop and a second program loop subsequent to the first program loop. Program voltage is applied a first number of times in the first program loop. Program voltage is applied a second number of times in the second program loop. The second number of times is larger than the first number of times.
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