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    • 4. 发明公开
    • Method for ultra-fast controlling of a magnetic cell and related devices
    • Verfahren zur superschnellen Steuerung magnetischer Zelle sowiezugehörigeVorrichtungen
    • EP1548702A1
    • 2005-06-29
    • EP03447312.4
    • 2003-12-24
    • INTERUNIVERSITAIR MICROELEKTRONICA CENTRUM VZW
    • Eyckmans, Wouter
    • G10K11/36G01R33/02H01L41/00G11C11/16H01F10/26H01F10/32H03K19/16
    • G01R33/02B82Y25/00G11C11/161G11C11/1673G11C11/1675H01F10/193H01F10/26H01F10/3213H01F10/3254H01F10/3268H01L43/08H03B15/006H03H2/001H03H9/02574H03H9/02645H03H9/02976H03H9/135H03H9/6486H03K19/19
    • The present invention relates to a device and corresponding method for ultrafast controlling of the magnetization of a magnetic element. A device (100) includes a surface acoustic wave generating means (102), a transport layer (104), which is typically functionally and partially structurally comprised in said SAW generating means (102), and at least one ferromagnetic element (106). A surface acoustic wave is generated and propagates in a transport layer (104) which typically consists of a piezo-electric material. Thus, strain is induced in the transport layer (104) and in the ferromagnetic element (106) in contact with this transport layer (104). Due to magneto elastic coupling this generates an effective magnetic field in the ferromagnetic element (106). If the surface acoustic wave has a frequency substantially close to the ferromagnetic resonance (FMR) frequency ν FMR the ferromagnetic element (106) is absorbed well and the magnetisation state of the element can be controlled with this FMR frequency. The device can be used in an RF-magnetic resonator, a sensor and a camera. The corresponding method can be used for ultrafast reading-out and switching of magnetic components and in magnetic logic.
    • 本发明涉及一种用于超快速控制磁性元件的磁化的装置和相应的方法。 一种装置(100)包括表面声波发生装置(102),通常在功能上和部分结构上包括在所述SAW发生装置(102)中的传输层(104)和至少一个铁磁元件(106)。 生成表面声波并在通常由压电材料组成的传输层(104)中传播。 因此,在与该传输层(104)接触的传输层(104)和铁磁元件(106)中诱发应变。 由于磁弹性耦合,这在铁磁元件(106)中产生有效的磁场。 如果表面声波具有基本上接近铁磁共振(FMR)频率nu FMR的频率,则铁磁元件(106)被良好地吸收并且可以用该FMR频率来控制元件的磁化状态。 该器件可用于射频磁共振器,传感器和相机。 相应的方法可用于磁性部件和磁性逻辑的超快速读出和切换。
    • 7. 发明授权
    • Acoustic degenerate four-wave mixing phase-conjugate reflector
    • 声退化四波混合相位共轭反射器
    • US4379998A
    • 1983-04-12
    • US277448
    • 1981-06-25
    • Richard C. Shockley
    • Richard C. Shockley
    • H03H9/68H03H9/25H03H9/145H03H9/42
    • H03H9/6486H03H9/68
    • An acoustic surface wave device is disclosed for generating an output signal that is the phase-conjugate of the input signal to the device. Disposed on the piezoelectric substrate is a first interdigital transducer for receiving a modulated input signal having a carrier center frequency f.sub.1 and for converting the input signal to an input acoustic wave. A semiconductor material is disposed over the surface of the piezoelectric substrate. A second interdigital transducer is disposed on the surface of the piezoelectric substrate between the first interdigital transducer and the semiconductor material. A standing wave at frequency f.sub.1 is generated by counterpropagating pump waves in the nonlinear acoustic wave interaction region in the area of the semiconductor material. The modulated input acoustic wave interacts with the counterpropagating pump waves in the nonlinear interaction region to generate an output signal on the output of the second interdigital transducer that is the phase-conjugate of the input signal.
    • 公开了一种声表面波装置,用于产生作为输入信号与装置的相位共轭的输出信号。 设置在压电基板上的是用于接收具有载波中心频率f1的调制输入信号并将输入信号转换为输入声波的第一叉指式换能器。 半导体材料设置在压电基板的表面上。 在第一叉指换能器和半导体材料之间的压电基板的表面上设置第二叉指换能器。 通过在半导体材料的区域中的非线性声波相互作用区域中的反向传播泵波产生频率f1的驻波。 调制的输入声波与非线性相互作用区域中的反向传播泵波相互作用,以在作为输入信号的相位共轭的第二叉指式换能器的输出上产生输出信号。
    • 8. 发明申请
    • SURFACE ACOUSTIC WAVE ELEMENT
    • 表面声波元件
    • WO99044284A1
    • 1999-09-02
    • PCT/JP1998/000728
    • 1998-02-24
    • H03H9/02H03H9/145H03H9/25H03H9/64
    • H03H9/14552H03H9/02795H03H9/1452H03H9/1455H03H9/14597H03H9/25H03H9/6436H03H9/6446H03H9/6486H03H2250/00
    • A surface acoustic wave element has a substrate, a first interdigital transducer which is mounted on the substrate, has first comb-tooth electrode fingers and transduces to output inputted electrical signals to surface acoustic waves, and a second interdigital transducer which is mounted on the substrate, has second comb-tooth electrode fingers and transduces to output inputted surface acoustic waves to electrical signals. The ratio of the line width of the first comb-tooth electrode fingers to the space width between the adjacent first comb-tooth electrode fingers is different from the ratio of the line width of the second comb-tooth electrode fingers. By adjusting the capacitive components of an input impedance and an output impedance by means of the first and the second interdigital transducer, the surface acoustic wave element can be matched with an external circuit, thereby reducing the entire size of the surface acoustic wave element.
    • 表面声波元件具有基板,安装在基板上的第一叉指式换能器具有第一梳齿电极指和转换以将输入的电信号输出到表面声波,以及安装在基板上的第二叉指式换能器 具有第二梳齿电极指和转换以将输入的声表面波输出到电信号。 第一梳齿电极指的线宽与相邻的第一梳齿电极指之间的空间宽度的比与第二梳齿电极指的线宽的比例不同。 通过利用第一和第二叉指式换能器调节输入阻抗和输出阻抗的电容分量,可以使声表面波元件与外部电路相匹配,从而减小声表面波元件的整体尺寸。