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    • 4. 发明授权
    • Magnetic tunnel junction magnetic random access memory
    • 磁隧道结磁随机存取存储器
    • US06597618B2
    • 2003-07-22
    • US10185667
    • 2002-06-27
    • Yuankai ZhengYihong WuXiaoyan WangDan You
    • Yuankai ZhengYihong WuXiaoyan WangDan You
    • G11C700
    • G11C11/16
    • A circuit for controlling a read operation for a magnetic random access memory (MRAM) comprising an array of magnetic tunnel junctions (MTJ) having conducting row and column lines attached thereto. The circuitry comprises a current supply for providing a read current, and a row selector for selecting a row containing a junction to be read and applying the read current to that row with the respective row line. An unselected row switch switches to at least some of the row lines not connected to the MTJ to be read, and a voltage source applies, via the unselected row switch, a voltage to each of the unselected row lines that is substantially identical in level to the voltage on the selected row line. A column selector selects the column line connected to the array containing the MTJ to be read, and a voltage detector for detecting the voltage across the MTJ to be read via the selected column and row lines.
    • 一种用于控制用于磁性随机存取存储器(MRAM)的读取操作的电路,包括具有连接到其上的导电行和列线的磁性隧道结(MTJ)阵列。 电路包括用于提供读取电流的电流源,以及用于选择包含要读取的结的行的行选择器,并且将读取的电流施加到具有相应行行的该行。 未选择的行开关切换到未连接到要读取的MTJ的至少一些行线,并且电压源通过未选择的行开关向每个未选择的行线施加电压,该电压基本上等于 所选行线上的电压。 列选择器选择连接到包含要读取的MTJ的阵列的列线,以及电压检测器,用于检测要通过所选列和行线读取的MTJ上的电压。
    • 5. 发明授权
    • Nano-contacted magnetic memory device
    • 纳米磁记忆装置
    • US07408802B2
    • 2008-08-05
    • US10577216
    • 2004-10-26
    • Yuankai ZhengYihong Wu
    • Yuankai ZhengYihong Wu
    • G11C11/00
    • G11C11/16H01L27/228H01L43/08
    • A magnetic memory device includes a plurality of transistors (316, 317) formed on a substrate and a common magnetic memory block (312) including a multiple effective magnetoresistive elements (318, 319), a ferromagnetic recording (312), a non-magnetic space (232), and a free magnetic reading (322) layer formed above the transistors (316, 317). An extended common digital line (315) is located above a common magnetic memory block (312) which is electrically connected with a respective source/drain electrode of the transistors (316, 317) through each a contact at a respective active area. The specific magnetization state of the ferromagnetic recording layer at the active areas can be changed by a heating process and applying an external field induced from the common digital line (315), the bit (309, 311) or word (307) lines. The change in resistance of the effective magnetoresistive element (318, 319) can be detected by means of changing the magnetization state of the free magnetic reacting layer during reading, thus a smaller switching field is required.
    • 一种磁存储器件包括形成在衬底上的多个晶体管(316,317)和包括多个有效磁阻元件(318,319),铁磁记录(312),非磁性的共用磁存储块(312) 空间(232)和形成在晶体管(316,317)上方的自由磁读取(322)层。 扩展的公共数字线路(315)位于公共磁存储器块(312)的上方,该公共磁存储器块通过每个相应有源区域上的触点与晶体管(316,317)的相应源极/漏极电连接。 可以通过加热处理并施加从公共数字线(315),位(309,311)或字(307)线引起的外部场来改变有源区上的铁磁记录层的特定磁化状态。 可以通过在读取期间改变自由磁反应层的磁化状态来检测有效磁阻元件(318,319)的电阻变化,因此需要较小的开关场。
    • 9. 发明授权
    • Magnetic memory device
    • 磁存储器件
    • US07486548B2
    • 2009-02-03
    • US10553223
    • 2003-04-16
    • Yuankai ZhengYihong Wu
    • Yuankai ZhengYihong Wu
    • G11C11/14
    • G11C11/16
    • A memory cell for a magnetic memory device comprising a first hard magnetic later having a first fixed magnetization vector; a second hard magnetic later having a second fixed magnetization vector; a first soft magnetic layer having a first alterable magnetization vector and disposed adjacent to the first hard magnetic layer and a second soft magnetic layer having a second alterable magnetization vector and disposed adjacent to the second hard magnetic layer, the first and the second soft magnetic layers are magnetostatically coupled antiparallel to each other to form a flux-closed structure. An electrically conductive layer is disposed between the two soft magnetic layers for passing an electric current therethrough to perform the read and write operations. A magnetic memory device made thereof possesses a higher thermal stability against external thermal fluctuations and in the meantime has a lower power dissipation in writing operations.
    • 一种用于磁存储器件的存储单元,包括具有第一固定磁化矢量的第一硬磁体; 稍后具有第二固定磁化矢量的第二硬磁体; 具有第一可变磁化矢量并且邻近第一硬磁层设置的第一软磁层和具有第二可变磁化矢量并且邻近第二硬磁层设置的第二软磁层,第一软磁层和第二软磁层 相互平行地并联地形成磁通闭合结构。 在两个软磁性层之间设置导电层,用于使电流通过其中以执行读取和写入操作。 由其制成的磁存储器具具有较高的热稳定性以抵抗外部热波动,并且同时在写入操作中具有较低的功耗。