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    • 6. 发明授权
    • Area efficient global row redundancy scheme for DRAM
    • 用于DRAM的区域有效的全局行冗余方案
    • US06101138A
    • 2000-08-08
    • US358982
    • 1999-07-22
    • Chun ShiahBor-Doou RongJeng-Tzong ShihPo-Hung Chen
    • Chun ShiahBor-Doou RongJeng-Tzong ShihPo-Hung Chen
    • G11C29/00G11C7/00
    • G11C29/808
    • In this invention a global row redundancy scheme for a DRAM is described which effectively uses the resources of the chip to produce an area efficient design. The DRAM is constructed from two types of memory blocks, one that has a redundant cell array and one that does not. Both memory block types contain a memory cell array and bit line sense amplifiers. The bit line sense amplifiers, contained on the block with the redundant cell array, are shared with the memory cell array also contained in the block, and thus eliminating the need for sense amplifiers for use only with the redundant cell array. Although, every block could contain a redundant cell array, only one or two blocks with the redundant cell array are normally used. In the global row redundancy scheme repair can be made to any row containing a failed memory cell located in any memory block by using any unused rows in any redundant cell array, and in doing so provides a maximum effectiveness in repairing DRAM's that provides the opportunity to maximize yield.
    • 在本发明中,描述了用于DRAM的全局行冗余方案,其有效地使用芯片的资源来产生区域有效的设计。 DRAM由两种类型的存储器块构成,一个具有冗余单元阵列,另一个不存在。 这两种存储块类型都包含存储单元阵列和位线读出放大器。 包含在具有冗余单元阵列的块上的位线读出放大器与也包含在该块中的存储单元阵列共享,因此不需要仅用于冗余单元阵列的读出放大器。 尽管每个块都可以包含冗余单元阵列,但通常只使用一个或两个具有冗余单元阵列的块。 在全局行冗余方案中,可以通过使用任何冗余单元阵列中的任何未使用的行来修复任何包含位于任何存储器块中的故障存储器单元的行,并且这样做可以提供修复提供机会的DRAM的最大有效性 最大化产量。
    • 9. 发明授权
    • Time controllable sensing scheme for sense amplifier in memory IC test
    • 用于存储器IC测试的读出放大器的时间可控感测方案
    • US07478294B2
    • 2009-01-13
    • US11152476
    • 2005-06-14
    • Bor-Doou RongShi-Huei Liu
    • Bor-Doou RongShi-Huei Liu
    • G01R31/28
    • G11C29/02G11C29/025G11C29/56012G11C2029/5006
    • A test method is described in which a signal from a tester enters a memory chip or memory module into a special test mode. The special test mode allows leakage defects connected to bit lines to be detected using bit line sense amplifiers. A first test command is issued by a tester, after which a word line is activated. The tester issues a second test command, delayed from the first test command, during the special test mode to turn-on the memory bit line sense amplifiers. The delayed second test command allows sufficient time for the leakage from defects at the crossing of the bit lines and the word line to charge capacitance of the bit lines and allow detection by the sense amplifiers.
    • 描述了一种测试方法,其中来自测试者的信号进入存储器芯片或存储器模块进入特殊测试模式。 特殊测试模式允许使用位线读出放大器检测连接到位线的泄漏缺陷。 第一个测试命令由测试仪发出,之后激活了一个字线。 在特殊测试模式下,测试仪发出第二个测试命令,从第一个测试命令延迟,以打开存储器位线读出放大器。 延迟的第二测试命令允许足够的时间从位线和字线的交叉处的缺陷泄漏以对位线的电容进行充电,并允许读出放大器进行检测。
    • 10. 发明授权
    • Low power SRAM redundancy repair scheme
    • 低功耗SRAM冗余修复方案
    • US06643166B1
    • 2003-11-04
    • US09992518
    • 2001-11-14
    • Tah-Kang Joseph TingBor-Doou RongShi-Huei Liu
    • Tah-Kang Joseph TingBor-Doou RongShi-Huei Liu
    • G11C1100
    • G11C29/83G11C29/832
    • A particular SRAM cell power scheme is disclosed. It ensures that overall chip power is reduced, by eliminating power contributed by defective memory array cells. The VSS path to the 6T memory cell is controlled via NMOS transistors. A VSS Enable (VSSEN) circuit is used to decode which block has a defect. Further, the VSSEN signal can be used to selectively disable a defective cell, or block of cells, by cutting the VSS path via turning off the NMOS transistor, in the normal cell region, and the VSSEN signal can be used to selectively enable a redundant cell, or block of cells, by turning on the VSS path via turning on the NMOS transistor, in the redundant cell region.
    • 公开了一种特定的SRAM单元电力方案。 通过消除由缺陷存储器阵列单元造成的功率,可以确保整体芯片功耗的降低。 通过NMOS晶体管控制到6T存储单元的VSS通路。 VSS使能(VSSEN)电路用于解码哪个块有缺陷。 此外,VSSEN信号可用于通过在正常单元区域中关断NMOS晶体管来切断VSS路径来选择性地禁用故障单元或单元块,并且可使用VSSEN信号选择性地使能冗余 通过在冗余单元区域中导通NMOS晶体管来导通VSS路径,从而使单元或单元块成为可能。