发明授权
US07542341B2 MIS-transistor-based nonvolatile memory device with verify function
有权
具有验证功能的基于MIS晶体管的非易失性存储器件
- 专利标题: MIS-transistor-based nonvolatile memory device with verify function
- 专利标题(中): 具有验证功能的基于MIS晶体管的非易失性存储器件
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申请号: US11841265申请日: 2007-08-20
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公开(公告)号: US07542341B2公开(公告)日: 2009-06-02
- 发明人: Takashi Kikuchi
- 申请人: Takashi Kikuchi
- 申请人地址: JP Fukuoka
- 专利权人: NSCORE, Inc.
- 当前专利权人: NSCORE, Inc.
- 当前专利权人地址: JP Fukuoka
- 代理机构: Ladas & Parry LLP
- 主分类号: G11C11/34
- IPC分类号: G11C11/34
摘要:
A nonvolatile semiconductor memory device includes a first latch to store data, a nonvolatile memory cell including two MIS transistors to store data as an irreversible change of transistor characteristics occurring in one of the two MIS transistors selected in response to the data stored in the first latch, a second latch to store data obtained by sensing a difference in the transistor characteristics between the two MIS transistors, a logic circuit to produce a signal indicative of comparison between the data of the first latch and the data of the second latch, and a control circuit configured to repeat a store operation storing data in the nonvolatile memory cell, a recall operation storing data in the second latch, and a verify operation producing the signal indicative of comparison until the signal indicates that the data of the first latch and the data of the second latch are the same.
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