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    • 1. 发明授权
    • Magnetic millipede for ultra high density magnetic storage
    • 磁性千斤顶用于超高密度磁存储
    • US06680808B2
    • 2004-01-20
    • US09798237
    • 2001-03-01
    • Rolf AllenspachGerd K. BinnigWalter HaeberlePeter Vettiger
    • Rolf AllenspachGerd K. BinnigWalter HaeberlePeter Vettiger
    • G11B502
    • G11B5/00B82Y10/00G11B5/012G11B5/255G11B5/488G11B5/4886G11B5/74G11B5/82G11B9/14G11B9/1409G11B9/1418G11B9/1463G11B13/045G11B2005/0002G11B2005/0005G11B2005/0021
    • The present invention relates to computer storage systems which have a tip (24) directed close or in contact to the storage medium (10) by which bit-writing and bit-reading is enforced. It is proposed to use a magnetizable storage medium (10), expose it to an artificial, external magnetic field H coupled externally to the storage medium, and—during bit writing—to concurrently apply heat very locally in bit size dimension in order to let the external magnetic field become locally larger than the (temperature-dependent) coercive field at the location (32) where heat is applied. Further, a two-dimensional array of cantilever tips (24) is advantageously used in an inventional storage system each of which tips serves as a heat source when it is activated by a current flowing through a resistive path within said tip (24) and producing the necessary temperature at the small storage medium location (32) where the bit writing is intended in order to approach the Curie temperature or the compensation temperature of the magnetic material.
    • 本发明涉及具有尖端(24)的计算机存储系统,所述尖端(24)紧密地或与存储介质(10)接触,由此执行位写入和位读取。 建议使用可磁化存储介质(10),将其暴露于外部耦合到存储介质的人造外部磁场H,并且在位写入期间同时以比特尺寸尺寸局部施加热量,以使 外部磁场局部地大于施加热量的位置(32)处的(温度依赖)矫顽场。 此外,悬臂尖端(24)的二维阵列有利地用于本发明的存储系统中,每个尖端在由流过所述尖端(24)内的电阻路径的电流激活时用作热源,并产生 在小存储介质位置(32)处必需的温度,其中位写入旨在接近居里温度或磁性材料的补偿温度。
    • 10. 发明授权
    • Magnetoresistive sensor having at least one layer with a pinned
magnetization direction
    • 磁阻传感器具有至少一个具有钉扎磁化方向的层
    • US6104189A
    • 2000-08-15
    • US95038
    • 1998-06-10
    • Rolf AllenspachWolfgang F. Weber
    • Rolf AllenspachWolfgang F. Weber
    • G01R33/09G11B5/00G11B5/31G11B5/39H01F10/32G11B5/127H01F7/06H01L43/00
    • B82Y25/00B82Y10/00G01R33/093G11B5/3903H01F10/3281G11B2005/3996G11B5/00G11B5/3163Y10T29/49044Y10T428/12465
    • A magnetoresistive spin valve sensor is described. Such a sensor is also known as a GMR sensor or giant magnetoresistive sensor. The layers (24, 26, 28) of the sensor are mounted on a substrate (20) having steps or terraces on one of its face. The steps or terraces on the substrate's surface cooperate with one or more of the ferromagnetic layers (24, 28) of the sensor to determine the layers' magnetic properties. Specifically, the thickness of one or more of the sensor's layers can be set above or below a critical thickness which determines whether the easy direction of uniaxial magnetization of a layer of that particular material is fixed or "pinned". If pinned, the layer has a high coercive field. Thus, the new device avoids a biasing layer to pin any of the magnetic layers. Preferably the easy axes of the first two ferromagnetic layers (24, 28) are set at 90.degree. to one another in the zero applied field condition by appropriate choice of layer thickness. A method for manufacturing and several fields of use of the sensor are also disclosed.
    • 描述了一种磁阻自旋阀传感器。 这种传感器也称为GMR传感器或巨磁阻传感器。 传感器的层(24,26,28)安装在其表面之一上具有台阶或台阶的基板(20)上。 衬底表面上的台阶或台阶与传感器的一个或多个铁磁层(24,28)配合,以确定层的磁特性。 具体地,可以将传感器层中的一个或多个的厚度设置在临界厚度的上方或下方,该临界厚度确定该特定材料的层的单轴磁化的容易方向是固定的还是“固定的”。 如果被固定,则该层具有高矫顽力场。 因此,新器件避免了偏置层来钉住任何磁性层。 优选地,通过适当选择层厚度,在零施加场条件下将前两个铁磁层(24,28)的易轴设置为彼此成90°。 还公开了一种制造方法和传感器的若干使用领域。