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    • 11. 发明授权
    • Semiconductor memory and nonvolatile semiconductor memory having redundant circuitry for replacing defective memory cell
    • 具有用于替换有缺陷的存储单元的冗余电路的半导体存储器和非易失性半导体存储器
    • US06320800B1
    • 2001-11-20
    • US09583540
    • 2000-06-01
    • Hidetoshi SaitoMasao KuriyamaYasuhiko HondaHideo Kato
    • Hidetoshi SaitoMasao KuriyamaYasuhiko HondaHideo Kato
    • G11C700
    • G11C29/78G11C8/06G11C16/26G11C2216/22
    • Redundant cell arrays 201 of a plurality of columns are provided for replacing a defective bit line of a memory cell array 101. Each of the redundant cell arrays 201 is provided with a redundant sense amplifier circuit 105 separately from a sense amplifier circuit 103 of the memory cell array 101. A defective address storing circuit 108 stores a defective address of the memory cell array 101, an input/output terminal, to and from which data corresponding to the defective address are. to be inputted and outputted, and a column set number of the redundant cell array which is to be replaced in accordance with the input/output terminal. An address comparator circuit 109 detects the coincidence of an input address with the defective address. A switch circuit 112 is controlled by the coincidence detection output to switch one corresponding to the defective address of a sense amplifier circuit to one selected by the set number in the redundant sense amplifier circuit, to connect it to a data input/output buffer 113. Thus, it is possible to provide a semiconductor memory capable of effectively relieving a plurality of defective columns and a defect in a boundary region in column directions of the cell array.
    • 多个列的冗余单元阵列201被提供用于替换存储单元阵列101的有缺陷的位线。每个冗余单元阵列201设置有与存储器的读出放大器电路103分离的冗余读出放大器电路105 单元阵列101.缺陷地址存储电路108存储与缺陷地址对应的数据的存储单元阵列101的缺陷地址,输入/输出端。 输入和输出,以及根据输入/输出端子要替换的冗余单元阵列的列组号。 地址比较电路109检测输入地址与缺陷地址的一致性。 开关电路112由重合检测输出控制,将与读出放大器电路的缺陷地址对应的一个切换到由冗余读出放大器电路中的设定数字选择的一个,将其连接到数据输入/输出缓冲器113。 因此,可以提供能够有效地消除多个缺陷列的半导体存储器和单元阵列的列方向上的边界区域中的缺陷。
    • 12. 发明授权
    • Semiconductor memory device having redundant circuitry for replacing defective memory cell
    • 具有用于替换有缺陷的存储单元的冗余电路的半导体存储器件
    • US06532181B2
    • 2003-03-11
    • US09963404
    • 2001-09-27
    • Hidetoshi SaitoMasao KuriyamaYasuhiko HondaHideo Kato
    • Hidetoshi SaitoMasao KuriyamaYasuhiko HondaHideo Kato
    • G11C700
    • G11C29/78G11C8/06G11C16/26G11C2216/22
    • A nonvolatile semiconductor memory includes a memory cell array and a redundant cell array, and while a data write operation or a data erase operation is carried out in one of banks in the memory cell array, a data read operation can be carried out in the other banks. The redundant cell array has one or more spare blocks and is provided independently of the banks to relieve a defective memory cell of the memory cell array by substituting the spare block for a defective memory block in any of the blocks. The memory block is active when an access block address to be accessed in the memory cell array in the data write or erase operation or the data read operation does not coincide with the defective block address in the defective address storing circuit, whereas the spare block is active when the access block address coincides with the defective block address in the defective address storing circuit.
    • 非易失性半导体存储器包括存储单元阵列和冗余单元阵列,并且在存储单元阵列中的一个存储体中进行数据写入操作或数据擦除操作时,可以在另一个存储单元阵列中执行数据读取操作 银行。 冗余单元阵列具有一个或多个备用块,并且独立于存储体提供,以通过将备用块替换为任何块中的有缺陷的存储块来解除存储单元阵列的有缺陷的存储单元。 当在数据写入或擦除操作或数据读取操作中要存储在存储单元阵列中的访问块地址与缺陷地址存储电路中的有缺陷块地址不一致时,存储块有效,而备用块是 当访问块地址与缺陷地址存储电路中的有缺陷的块地址一致时有效。
    • 13. 发明授权
    • Semiconductor memory device
    • 半导体存储器件
    • US06906960B2
    • 2005-06-14
    • US10383633
    • 2003-03-10
    • Hidetoshi SaitoHideo KatoTokumasa Hara
    • Hidetoshi SaitoHideo KatoTokumasa Hara
    • G11C16/02G11C8/12G11C16/08G11C16/04
    • G11C8/12G11C16/08G11C2216/22
    • A semiconductor memory device includes: a plurality of banks with electrically rewritable memory cells arranged therein, the banks being configured to be simultaneously accessible in such a manner that a data write operation into a bank and a data read operation for another bank are simultaneously performed; a write-use data bus commonly disposed for the plurality of banks; a read-use data bus commonly disposed for the plurality of banks; a write circuit connected to the write-use data bus; a read circuit connected to the read-use data bus; a bank address decoder circuit for decoding external bank address signals for bank selecting to output internal bank address signals, the bank address decoder circuit having such an address conversion function that one of plural kinds of address conversions between the external bank address signals and the internal bank address signals is selectable; and a rewrite control circuit for sequence controlling a data write operation for a bank selected by the bank address decoder circuit.
    • 一种半导体存储器件包括:具有布置在其中的电可重写存储器单元的多个存储体,所述存储体被配置为可同时访问,以使得对于存储体的数据写操作和对于另一存储体的数据读操作同时进行; 通常为多个银行设置的写用数据总线; 通常为多个银行设置的读取用数据总线; 连接到写入用数据总线的写入电路; 连接到读取用数据总线的读取电路; 用于解码用于存储体选择的外部存储体地址信号以输出内部存储体地址信号的存储体地址解码器电路,该存储体地址译码器电路具有这样一种地址转换功能:外部存储体地址信号与内部存储体之间的多种地址转换之一 地址信号可选; 以及重写控制电路,用于对由银行地址解码器电路选择的存储体进行数据写入操作的顺序控制。
    • 14. 发明授权
    • Semiconductor storage device with automatic write/erase function
    • 具有自动写入/擦除功能的半导体存储设备
    • US06222779B1
    • 2001-04-24
    • US09460644
    • 1999-12-15
    • Hidetoshi SaitoHideo KatoNaoto TomitaTokumasa Hara
    • Hidetoshi SaitoHideo KatoNaoto TomitaTokumasa Hara
    • G11C700
    • G11C16/16G11C16/12
    • A semiconductor storage device, which has an automatic write/erase function, and uses a potential obtained by boosting a power supply voltage upon write/erase, has a write division control circuit which shifts the selection timings of bit lines upon write, so as to decrease the number of bits to be written simultaneously, thereby reducing the consumption current and compensating for insufficient current supply performance of a power supply circuit in case the power supply voltage is low, and refers to the contents of erase flags upon pre-programming in erase, and erase only blocks that require erases, while, when the power supply voltage is high as the power supply voltage has a wide range or the write time is short as in an acceleration test, the number of bits to be selected at the same time is increased to prevent an increase in write/erase time.
    • 具有自动写入/擦除功能并且使用通过在写入/擦除时提高电源电压而获得的电位的半导体存储装置具有写入分配控制电路,其在写入时移位位线的选择定时,以便 减少要同时写入的位数,从而降低消耗电流并补偿在电源电压低的情况下电源电路的电流供应不足,并且在擦除预编程时参考擦除标志的内容 ,并且仅擦除需要擦除的块,而当电源电压为高电平时,电源电压具有较大的范围或写入时间短于加速度测试时,同时选择的位数 增加以防止写入/擦除时间的增加。