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    • 81. 发明授权
    • Apparatus for recording and reproducing optical information having an
optical waveguide
    • 用于记录和再现具有光波导的光信息的装置
    • US5418765A
    • 1995-05-23
    • US188944
    • 1994-01-27
    • Shigeyoshi MisawaKiyoshi YokomoriMasahiko Nakayama
    • Shigeyoshi MisawaKiyoshi YokomoriMasahiko Nakayama
    • G11B7/12G11B7/09
    • G11B7/124
    • A focal point position detector has a light source for emitting light; an optical system for converging light from the light source to an optical recording medium; a coupler for coupling light from the optical recording medium thereto; a waveguide concave mirror for converging light from the coupler; a waveguide convex mirror for slightly reducing a converging degree of light from the waveguide concave mirror; and photodetectors for receiving light from the waveguide convex mirror, The coupler, the waveguide concave and convex mirrors and the photodetectors are integrally formed on a substrate, An apparatus for recording and reproducing optical information has a light source; an optical system for converging light emitted from the light source; an optical waveguide; a coupler for coupling the converged light to the optical waveguide; two waveguide mirrors arranged such that reflected light from the coupler is continuously reflected on the waveguide mirrors; and a photodetector for detecting the light reflected on the waveguide mirrors. The coupler, the optical waveguide, the waveguide mirrors and the photodetector are integrally formed on the same substrate.
    • 焦点位置检测器具有用于发光的光源; 用于将来自光源的光会聚到光学记录介质的光学系统; 用于将来自光学记录介质的光耦合到其的耦合器; 用于会聚来自耦合器的光的波导凹面镜; 用于稍微降低来自波导凹面镜的会聚光的波导凸面镜; 以及用于接收来自波导凸面镜的光的光电检测器,耦合器,波导凹凸镜和光电检测器一体地形成在基板上。用于记录和再现光信息的设备具有光源; 用于会聚从光源发出的光的光学系统; 光波导; 用于将会聚光耦合到光波导的耦合器; 两个波导反射镜布置成使得来自耦合器的反射光在波导反射镜上连续反射; 以及用于检测在波导反射镜上反射的光的光电检测器。 耦合器,光波导,波导反射镜和光电检测器一体地形成在同一基板上。
    • 86. 发明授权
    • Magnetic random access memory and write method of the same
    • 磁性随机存取存储器和写入方法相同
    • US08553450B2
    • 2013-10-08
    • US12510063
    • 2009-07-27
    • Keiji HosotaniMasahiko Nakayama
    • Keiji HosotaniMasahiko Nakayama
    • G11C11/00
    • G11C11/1675G11C11/161
    • A first magnetic layer has a magnetization fixed along one direction. A first nonmagnetic layer on the first magnetic layer functions as a first tunnel barrier. A second magnetic layer on the first nonmagnetic layer has a magnetization whose direction can be reversed by spin transfer current injection. A second nonmagnetic layer on the second magnetic layer functions as a second tunnel barrier. A third magnetic layer on the second nonmagnetic layer has a magnetization whose direction can be reversed by spin transfer through current injection at a current density different from the second magnetic layer. First magnetic, first nonmagnetic layer, and second magnetic layers exhibit a first magnetoresistive effect. Second magnetic, second nonmagnetic, and third magnetic layers exhibit a second magnetoresistive effect. A magnetoresistive effect element records and reads out data of at least three levels based on a synthetic resistance from the first and second magnetoresistive effects.
    • 第一磁性层具有沿着一个方向固定的磁化。 第一磁性层上的第一非磁性层用作第一隧道势垒。 第一非磁性层上的第二磁性层具有通过自旋转移电流注入方向可以反转的磁化。 第二磁性层上的第二非磁性层用作第二隧道势垒。 第二非磁性层上的第三磁性层具有磁化,其方向可以通过在不同于第二磁性层的电流密度的电流注入的自旋转移来反转。 第一磁性,第一非磁性层和第二磁性层表现出第一磁阻效应。 第二磁性,第二非磁性和第三磁性层表现出第二磁阻效应。 磁阻效应元件基于来自第一和第二磁阻效应的合成电阻来记录和读出至少三个电平的数据。
    • 87. 发明授权
    • Magnetoresistance effect element and magnetic random access memory
    • 磁阻效应元件和磁性随机存取存储器
    • US08279663B2
    • 2012-10-02
    • US13184976
    • 2011-07-18
    • Masahiko NakayamaTadashi KaiSumio IkegawaHiroaki YodaTatsuya Kishi
    • Masahiko NakayamaTadashi KaiSumio IkegawaHiroaki YodaTatsuya Kishi
    • G11C11/00
    • H01L43/08G11C11/161G11C11/1675H01L27/226
    • A magnetoresistance effect element includes: a first ferromagnetic layer having invariable magnetization perpendicular to a film plane; a second ferromagnetic layer having variable magnetization perpendicular to the film plane; a first nonmagnetic layer interposed between the first ferromagnetic layer and the second ferromagnetic layer; a third ferromagnetic layer provided on an opposite side of the second ferromagnetic layer from the first nonmagnetic layer, and having variable magnetization parallel to the film plane; and a second nonmagnetic layer interposed between the second and third ferromagnetic layers. Spin-polarized electrons are injected into the second ferromagnetic layer by flowing a current in the direction perpendicular to the film planes between the first and third ferromagnetic layers, precession movement is induced in the magnetization of the third ferromagnetic layer by injecting the spin-polarized electrons, and a microwave magnetic field of a frequency corresponding to the precession movement is applied to the second ferromagnetic layer.
    • 磁阻效应元件包括:具有垂直于膜平面的不变磁化的第一铁磁层; 具有垂直于膜平面的可变磁化的第二铁磁层; 介于所述第一铁磁层和所述第二铁磁层之间的第一非磁性层; 第三铁磁层,其设置在所述第二铁磁层的与所述第一非磁性层相反的一侧上,并且具有与所述膜平面平行的可变磁化强度; 以及插入在第二和第三铁磁层之间的第二非磁性层。 通过在垂直于第一和第三铁磁层之间的膜平面的方向上流动电流,将旋转极化电子注入到第二铁磁层中,通过注入自旋极化电子在第三铁磁层的磁化中引起进动运动 并且将对应于进动运动的频率的微波磁场施加到第二铁磁层。