Invention Grant
- Patent Title: Semiconductor memory device
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Application No.: US15233651Application Date: 2016-08-10
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Publication No.: US09786380B2Publication Date: 2017-10-10
- Inventor: Shinji Suzuki
- Applicant: Toshiba Memory Corporation
- Applicant Address: JP Tokyo
- Assignee: Toshiba Memory Corporation
- Current Assignee: Toshiba Memory Corporation
- Current Assignee Address: JP Tokyo
- Agency: Patterson & Sheridan, LLP
- Priority: JP2015-178579 20150910
- Main IPC: G11C16/26
- IPC: G11C16/26 ; G11C16/34 ; G11C16/10 ; G11C16/04 ; G11C16/08 ; G11C11/56 ; G11C16/24

Abstract:
A semiconductor memory device includes a memory cell includes a charge storage layer, a word line that is connected to a gate of the memory cell, and a controller that performs a write operation on the memory cell by applying a write voltage to the word line, and a verify operation to verify a threshold voltage of the memory cell after the write operation. The verify operation includes a first verify operation using a first verify voltage, and a second verify operation using a second verify voltage higher than the first verify voltage.
Public/Granted literature
- US20170076815A1 SEMICONDUCTOR MEMORY DEVICE Public/Granted day:2017-03-16
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