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    • 10. 发明授权
    • Semiconductor memory device and method of testing same
    • 半导体存储器件及其测试方法
    • US07913126B2
    • 2011-03-22
    • US11976652
    • 2007-10-26
    • Hiroshi NakagawaKanji Oishi
    • Hiroshi NakagawaKanji Oishi
    • G11C29/00
    • G11C29/24
    • Provided is a semiconductor memory device in which it is possible to conduct a parallel test by comparison with an expected value after replacement with a redundant cell. The memory device includes a logic circuit for outputting an activated redundant hit signal when at least one determination circuit of determination circuits corresponding to respective ones of a plurality of redundant addresses is activated; a logic circuit for outputting an activated signal when all outputs of the circuits are inactive; and a selector for outputting a test-result mask signal when a redundant area is tested, and outputting the output of the logic circuit when a normal area is tested. The test result is forcibly passed when a memory array is tested and when a redundant address is accessed.
    • 提供了一种半导体存储器件,其中可以通过与冗余单元替换之后的期望值进行比较来进行并行测试。 所述存储装置包括逻辑电路,用于当与多个冗余地址中的各个冗余地址相对应的确定电路的至少一个确定电路被激活时,输出激活的冗余命中信号; 用于当所述电路的所有输出都不活动时输出激活信号的逻辑电路; 以及选择器,用于当测试冗余区域时输出测试结果屏蔽信号,并且当正常区域被测试时输出逻辑电路的输出。 当测试存储器阵列和访问冗余地址时,测试结果被强制传递。