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    • 89. 发明公开
    • Magnetic memory
    • 磁记忆
    • EP1796101A2
    • 2007-06-13
    • EP06113049.8
    • 2006-04-25
    • TDK Corporation
    • Haratani, Susumu
    • G11C11/16
    • G11C11/16B82Y10/00H01L27/228H01L43/08
    • A magnetic memory (1) having a wire (5) extended in a direction of arbitrary decision, an electro-resistivity effect element (4) disposed adjacently to the wire (5), and a counterelement side yoke (20B) disposed adjacently on the side opposite the magneto-resistivity effect element (4) in the wire (5) and having the thickness of the counterelement side yoke (20B) so set as to be larger than 50 nm and smaller than 150 nm. Owing to conformity with this invention, this magnetic memory is enabled to homogenize the magnetization property during the course of writing operation and perform the writing work with a low electric current.
    • 1,一种磁存储器,具有在任意决定的方向上延伸的导线(5),与电线(5)相邻地设置的电阻效应元件(4),以及相邻地设置在所述导线上的反元件侧轭(20B) (5)中的磁阻效应元件(4)的相反侧,并且反元件侧磁轭(20B)的厚度设定为大于50nm且小于150nm。 由于符合本发明,该磁存储器能够在写操作过程中使磁化特性均匀化,并以低电流进行写操作。
    • 90. 发明公开
    • A reference cell scheme for MRAM
    • 参考文献MRAM Speicher
    • EP1788576A2
    • 2007-05-23
    • EP06392014.4
    • 2006-11-07
    • MagIC Technologies Inc.Applied Spintronics, Inc.
    • Hsu Kai YangPo-Kang WangXizeng Shi
    • G11C11/15G11C11/16G11C7/14
    • G11C7/14G11C11/16
    • An MRAM reference cell sub-array provides a mid-point reference current to sense amplifiers. The MRAM reference cell sub-array has MRAM cells arranged in rows and columns. Bit lines are associated with each column of the sub-array. A coupling connects the bit lines of pairs of the columns together at a location proximally to the sense amplifiers. The MRAM cells of a first of the pair of columns are programmed to a first magneto-resistive state and the MRAM cells of a second of the pair of columns are programmed to a second magneto-resistive state. When one row of data MRAM cells is selected for reading, a row of paired MRAM reference cells are placed in parallel to generate the mid-point reference current for sensing. The MRAM reference sub-array may be programmed electrically or aided by a magnetic field. A method for verifying programming of the MRAM reference sub-array is discussed.
    • MRAM参考单元子阵列提供了一个中点参考电流来读取放大器。 MRAM参考单元子阵列具有以行和列排列的MRAM单元。 位线与子阵列的每列相关联。 一个耦合将一对列的位线连接在读出放大器的近旁的位置处。 一对列中的第一列的MRAM单元被编程为第一磁阻状态,并且该对列中的第二对的MRAM单元被编程为第二磁阻状态。 当选择一行数据MRAM单元进行读取时,并行放置一对配对的MRAM参考单元,以产生用于感测的中点参考电流。 MRAM参考子阵列可以被电场编程或由磁场辅助。 讨论了一种验证MRAM参考子阵列编程的方法。