发明授权
- 专利标题: Nonvolatile semiconductor memory device
- 专利标题(中): 非易失性半导体存储器件
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申请号: US14019731申请日: 2013-09-06
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公开(公告)号: US09070474B2公开(公告)日: 2015-06-30
- 发明人: Tatsuo Izumi
- 申请人: KABUSHIKI KAISHA TOSHIBA
- 申请人地址: JP Minato-ku
- 专利权人: KABUSHIKI KAISHA TOSHIBA
- 当前专利权人: KABUSHIKI KAISHA TOSHIBA
- 当前专利权人地址: JP Minato-ku
- 代理机构: Oblon, McClelland, Maier & Neustadt, L.L.P.
- 主分类号: G11C11/34
- IPC分类号: G11C11/34 ; G11C16/06 ; G11C16/34 ; G11C16/16
摘要:
An erase verify operation is executed divided into at least a first erase verify operation and a second erase verify operation. The first erase verify operation is an operation that applies a verify read voltage only to a first group of memory cells among the plurality of memory cells included in the NAND cell unit, and applies a first read pass voltage to memory cells other than the first group of memory cells. The second erase verify operation is an operation that applies the verify read voltage to a second group of memory cells different from the first group of memory cells, and applies a second read pass voltage different from the first read pass voltage to memory cells other than the second group of memory cells.
公开/授权文献
- US20140226407A1 NONVOLATILE SEMICONDUCTOR MEMORY DEVICE 公开/授权日:2014-08-14
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