Method and device for preventing unauthorized use of credit cards
    4.
    发明授权
    Method and device for preventing unauthorized use of credit cards 失效
    防止未经授权使用信用卡的方法和装置

    公开(公告)号:US6095416A

    公开(公告)日:2000-08-01

    申请号:US28855

    申请日:1998-02-24

    IPC分类号: G06K19/073 G07F7/10 G06K7/08

    摘要: An authorization card, such as a credit card, has a security feature. The authorization card generally has two operational states, a disabled state and an enable state. In the disabled state, which is the default mode of operation, access to confidential information stored on the card is denied. The card remains in the disabled state until a PIN code is entered on a keypad provided on the card. Once the card is enabled, access to the confidential information is permitted for a predetermined period of time, after which the card reverts back to the default disabled state. The security feature is implemented on a magnetic card, an electronic smart card, and passive electronic card.

    摘要翻译: 授权卡,如信用卡,具有安全功能。 授权卡通常具有两种操作状态,禁用状态和使能状态。 在禁用状态(默认操作模式)下,存储在卡上的机密信息的访问被拒绝。 卡片保持在禁用状态,直到在卡上提供的键盘上输入PIN码。 一旦该卡被启用,在预定的时间段内允许访问机密信息,之后卡恢复到默认禁用状态。 安全功能在磁卡,电子智能卡和无源电子卡上实现。

    Composite magneto-optic memory and media
    5.
    发明授权
    Composite magneto-optic memory and media 失效
    复合磁光存储器和介质

    公开(公告)号:US5612131A

    公开(公告)日:1997-03-18

    申请号:US54646

    申请日:1993-04-26

    摘要: A magneto-optic memory and a magnetic material is described incorporating a polarized light beam directed towards a magnetic material and an analyzer for intercepting the polarized light beam after passing through the magnetic material or after being reflected by the magnetic material. The magnetic material includes a matrix of metal such as iron, cobalt, nickel, and alloys thereof and a plurality of separated phases distributed in the matrix such as EuS, EuO, EuOTb, PtMnSb, MnAs, MnBi, MnSb, CrO.sub.2, CrTe, GdN, Gd.sub.4 C, other compounds of a rare earth element and manganese compounds. Terbium or neodymium may be dissolved in the matrix of metal and in the plurality of separated phases. The invention overcomes the problem of providing a magnetic material having a Curie point above room temperature, a square perpendicular hysteresis loop at room temperature, a large magneto-optic rotation at the wavelength of interest and a deposition temperature suitable depositing on polymer substrates.

    摘要翻译: 描述了磁光存储器和磁性材料,其包括朝向磁性材料的偏振光束和用于在通过磁性材料之后或在被磁性材料反射之后截取偏振光束的分析器。 磁性材料包括诸如铁,钴,镍及其合金的金属基体以及分布在诸如EuS,EuO,EuOTb,PtMnSb,MnAs,MnBi,MnSb,CrO 2,CrTe,GdN之类的基体中的多个分离相 ,Gd4C,其他化合物的稀土元素和锰化合物。 铽或钕可以溶解在金属基体和多个分离相中。 本发明克服了提供具有高于室温的居里点,室温下的正方形垂直磁滞回线,感兴趣波长处的大磁光旋转和适合沉积在聚合物基底上的沉积温度的磁性材料的问题。

    Method of forming a giant magnetoresistance sensor
    6.
    发明授权
    Method of forming a giant magnetoresistance sensor 失效
    形成巨磁阻传感器的方法

    公开(公告)号:US5565236A

    公开(公告)日:1996-10-15

    申请号:US449449

    申请日:1995-05-24

    摘要: A method for forming a giant magnetoresistance sensor and method for making is described incorporating an oriented granular layer wherein the layer has a copper matrix with magnetic particles of a nickel cobalt alloy wherein the magnetic particles have a magnetocrystalline anisotropy constant K.sub.1 in the range from 0 to 3.times.10.sup.4 ergs/cm.sup.3. Alternatively, a silver or gold matrix may be used with magnetic particles of a nickel-iron alloy. The granular layer preferably has a (100) texture to provide the magnetic particles with their easy axes in the plane of the layer. The magnetic particles have their largest dimension in the range from 40 to 400 angstroms. The invention overcomes the problem of requiring a large magnetic field to obtain the saturation .DELTA.R/R. By providing a granular film with magnetic particles of low anisotropy, the saturation field to obtain .DELTA.R/R may be as low as 10 to 20 Oe.

    摘要翻译: 描述了一种形成巨磁电阻传感​​器的方法及其制造方法,该方法结合了取向颗粒层,其中该层具有带镍钴合金磁性颗粒的铜基体,其中磁性颗粒的磁晶各向异性常数K1在0至 3x104 ergs / cm3。 或者,银或金基质可以与镍 - 铁合金的磁性颗粒一起使用。 颗粒层优选具有(100)结构,以使磁性颗粒在层的平面中具有易于轴的位置。 磁性颗粒的最大尺寸在40至400埃的范围内。 本发明克服了需要大磁场获得饱和度DELTA R / R的问题。 通过提供具有低各向异性的磁性颗粒的颗粒膜,获得DELTA R / R的饱和场可以低至10至20Oe。

    Magneto-optic memory allowing direct overwrite of data
    8.
    发明授权
    Magneto-optic memory allowing direct overwrite of data 失效
    磁光存储器允许直接覆盖数据

    公开(公告)号:US5463578A

    公开(公告)日:1995-10-31

    申请号:US310465

    申请日:1994-09-22

    摘要: A magneto-optic memory and storage medium with the ability to directly write or overwrite ones and zeros at recording speed is described incorporating a radiant energy source, a control circuit for adjusting the power of the radiant energy beam and magneto-optic medium having a three layer sandwich comprising a magnetic bias layer, storage layer, and a switching layer therebetween functioning to switch from an antiferromagnetic state at low temperatures to a ferromagnetic state at temperatures above T.sub.AF. The invention overcomes the problem of direct overwrite of ones and zeros on magneto-optic media.

    摘要翻译: 描述了具有以记录速度直接写入或覆盖1和0的能力的磁光存储器和存储介质,其包括辐射能源,用于调节辐射能量束的功率的控制电路和具有三 层间夹层包括磁偏置层,存储层和它们之间的切换层,其功能是在高于TAF的温度下从低温下的反铁磁状态切换到铁磁状态。 本发明克服了在磁光介质上直接重写1和0的问题。