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    • 5. 发明公开
    • Memory structure in ferroelectric nonvolatile memory and readout method therefor
    • Speicherstruktur in ferroelektrischemnichtflüchtigenSpeicher unddiesbezüglicheAuslesemethode
    • EP0982779A3
    • 2000-05-17
    • EP99116504.4
    • 1999-08-23
    • Semiconductor Technology Academic Research Center
    • Ishiwara, Hiroshi
    • H01L27/115G11C11/22
    • H01L27/11502G11C11/223
    • Each of memory cells of a ferroelectric nonvolatile memory includes a MOS field effect transistor (Tr) and first and second ferroelectric capacitors (C B , C A ) whose remnant polarization amounts are substantially equal to each other. One-side electrodes of the first and second ferroelectric capacitors are connected to the gate electrode of the MOS field effect transistor. Information is stored by polarizing the thin ferroelectric films of the first and second ferroelectric capacitors in opposite directions to each other with respect to the gate electrode of the MOS field effect transistor. Information is read out by applying a positive voltage pulse to one of the other electrodes of the first and second ferroelectric capacitors while the other one of the other electrodes is kept in the electrically floating state. Further a negative voltage pulse having an absolute value smaller than the positive voltage pulse may be applied, if necessary.
    • 铁电非易失性存储器的每个存储单元包括MOS场效应晶体管(Tr)和剩余极化量彼此基本相等的第一和第二强电介质电容器(CB,CA)。 第一和第二铁电电容器的单面电极连接到MOS场效应晶体管的栅电极。 信息通过相对于MOS场效应晶体管的栅电极使彼此相反的方向偏振第一和第二强电介质电容器的薄铁酸薄膜来存储。 通过将正电压脉冲施加到第一和第二铁电电容器的另一个电极而另一个电极保持在电浮动状态来读出信息。 此外,如果需要,可以施加绝对值小于正电压脉冲的负电压脉冲。
    • 8. 发明公开
    • Memory structure in ferroelectric nonvolatile memory and readout method therefor
    • 铁电非易失性存储器中的存储器结构及其读出方法
    • EP0982779A2
    • 2000-03-01
    • EP99116504.4
    • 1999-08-23
    • Semiconductor Technology Academic Research Center
    • Ishiwara, Hiroshi
    • H01L27/115
    • H01L27/11502G11C11/223
    • Each of memory cells of a ferroelectric nonvolatile memory includes a MOS field effect transistor (Tr) and first and second ferroelectric capacitors (C B , C A ) whose remnant polarization amounts are substantially equal to each other. One-side electrodes of the first and second ferroelectric capacitors are connected to the gate electrode of the MOS field effect transistor. Information is stored by polarizing the thin ferroelectric films of the first and second ferroelectric capacitors in opposite directions to each other with respect to the gate electrode of the MOS field effect transistor. Information is read out by applying a positive voltage pulse to one of the other electrodes of the first and second ferroelectric capacitors while the other one of the other electrodes is kept in the electrically floating state. Further a negative voltage pulse having an absolute value smaller than the positive voltage pulse may be applied, if necessary.
    • 铁电非易失性存储器的每个存储单元包括MOS场效应晶体管(Tr)和残余极化量彼此基本相等的第一和第二铁电电容器(CB,CA)。 第一和第二铁电电容器的一侧电极连接到MOS场效应晶体管的栅极。 通过使第一和第二铁电体电容器的薄铁电体膜相对于MOS场效应晶体管的栅电极在彼此相反的方向上极化来存储信息。 通过向第一和第二铁电电容器的其中一个电极施加正电压脉冲而读出信息,而另一个电极保持电浮动状态。 此外,如果需要,可以施加绝对值小于正电压脉冲的负电压脉冲。