发明授权
- 专利标题: Method and apparatus for reduced fatigue in ferroelectric memory
- 专利标题(中): 铁电存储器疲劳减少的方法和装置
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申请号: US395582申请日: 1995-02-27
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公开(公告)号: US5508954A公开(公告)日: 1996-04-16
- 发明人: Takashi Mihara , Hitoshi Watanabe , Hiroyuki Yoshimori , Carlos A. Paz de Araujo , Larry D. McMillan
- 申请人: Takashi Mihara , Hitoshi Watanabe , Hiroyuki Yoshimori , Carlos A. Paz de Araujo , Larry D. McMillan
- 申请人地址: CO Colorado Springs JPX Tokyo
- 专利权人: Symetrix Corporation,Olympus Optical Co., Ltd.
- 当前专利权人: Symetrix Corporation,Olympus Optical Co., Ltd.
- 当前专利权人地址: CO Colorado Springs JPX Tokyo
- 主分类号: G11C14/00
- IPC分类号: G11C14/00 ; G11C11/22 ; G11C16/04 ; H01L21/8247 ; H01L27/10 ; H01L29/788 ; H01L29/792 ; G11C11/12
摘要:
A method and apparatus for programming ferroelectric memory cells which reduces polarizability fatigue effects of switching polarization of the ferroelectric devices associated with the memory cells such as ferroelectric capacitors and transistors. Alteration of the pulse width duty cycle associated with signals used to switch ferroelectric device polarization is shown to reduce polarizability fatigue of the ferroelectric material thereby increasing the useful life of ferroelectric memory cells. Methods and apparatus for producing a signal pulse duty cycle in the range 2-30% is disclosed and shown to improve the useful life of the ferroelectric material.
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