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    • 5. 发明公开
    • SEMICONDUCTOR MEMORY
    • 半导体存储器
    • EP2006859A9
    • 2009-05-20
    • EP06730215.8
    • 2006-03-28
    • Fujitsu Microelectronics Limited
    • KOBAYASHI, Hiroyuki
    • G11C29/04
    • G11C29/848G11C7/24
    • Regular redundancy lines are provided dedicatedly and respectively corresponding to redundancy fuse circuits in which defect addresses are programmed. A reservation redundancy line is provided in common to the redundancy fuse circuits. Address comparison circuits each compare the defect addresses programmed in the redundancy fuse circuits with an access address and output a redundancy signal when a comparison result is a match. A switch circuit is controlled to switch according to a redundancy selection signal output from a selection fuse circuit, and validates in response to the redundancy signal either a corresponding regular redundancy line or the reservation redundancy line. By dividing the redundancy lines into the regular redundancy lines and the reservation redundancy line, each of the redundancy fuse circuits can be made to correspond to one of the plurality of redundancy lines with the simple switch circuit. Therefore, a difference in propagation delay time of a signal can be made small and a difference in access time can be made small between when relieving a defect and when there is no defect.
    • 常规冗余线专门提供并分别对应于其中编程了缺陷地址的冗余熔丝电路。 冗余熔丝电路共同提供预留冗余线。 地址比较电路各自将冗余熔丝电路中编程的缺陷地址与访问地址进行比较,并且当比较结果匹配时输出冗余信号。 控制开关电路根据从选择熔丝电路输出的冗余选择信号进行切换,并响应于冗余信号使对应的正常冗余线或预留冗余线有效。 通过将冗余线划分为正常冗余线和预留冗余线,每个冗余熔丝电路可以通过简单的开关电路而与多条冗余线中的一条相对应。 因此,可以减小信号的传播延迟时间的差异,并且可以在减轻缺陷和没有缺陷时减小访问时间的差异。
    • 6. 发明公开
    • SEMICONDUCTOR MEMORY
    • HALBLEITERSPEICHER
    • EP2006859A2
    • 2008-12-24
    • EP06730215.8
    • 2006-03-28
    • Fujitsu Ltd.
    • KOBAYASHI, Hiroyuki
    • G11C29/04
    • G11C29/848G11C7/24
    • Regular redundancy lines are provided dedicatedly and respectively corresponding to redundancy fuse circuits in which defect addresses are programmed. A reservation redundancy line is provided in common to the redundancy fuse circuits. Address comparison circuits each compare the defect addresses programmed in the redundancy fuse circuits with an access address and output a redundancy signal when a comparison result is a match. A switch circuit is controlled to switch according to a redundancy selection signal output from a selection fuse circuit, and validates in response to the redundancy signal either a corresponding regular redundancy line or the reservation redundancy line. By dividing the redundancy lines into the regular redundancy lines and the reservation redundancy line, each of the redundancy fuse circuits can be made to correspond to one of the plurality of redundancy lines with the simple switch circuit. Therefore, a difference in propagation delay time of a signal can be made small and a difference in access time can be made small between when relieving a defect and when there is no defect.
    • 专门提供常规冗余线,分别对应于冗余熔丝电路,其中对缺陷地址进行编程。 为冗余保险丝电路提供预留冗余线路。 每个地址比较电路将冗余保险丝电路中编程的缺陷地址与访问地址进行比较,并在比较结果匹配时输出冗余信号。 控制开关电路根据从选择熔丝电路输出的冗余选择信号进行切换,并根据冗余信号进行相应的规则冗余线路或预留冗余线路的验证。 通过将冗余线划分为常规冗余线和预留冗余线,可以利用简单的开关电路使冗余熔丝电路中的每一个对应于多条冗余线之一。 因此,可以使信号的传播延迟时间的差异小,并且当不存在缺陷时和不存在缺陷时可以使访问时间的差异较小。