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    • 72. 发明专利
    • Semiconductor integrated circuit, and test method of semiconductor integrated circuit
    • 半导体集成电路及半导体集成电路测试方法
    • JP2007017236A
    • 2007-01-25
    • JP2005197888
    • 2005-07-06
    • Toshiba Corp株式会社東芝
    • URATA KOJIONOZAKI YASUTOMO
    • G01R31/28
    • G01R31/318594G01R31/318552
    • PROBLEM TO BE SOLVED: To provide a semiconductor integrated circuit capable of performing an at-speed test of a system logic circuit around a RAM.
      SOLUTION: The semiconductor integrated circuit comprises a memory BIST circuit 4 for writing a test pattern for memory into a random access memory after clearing a failure test of a random access memory RAM, a scan chain 11 for performing shift-in of a test pattern for logic generated by automatic pattern generation on the condition that the test pattern for memory is read out without being rewritten, and a combination logic circuit 6 capable of constituting a system logic circuit 2 with the scan chain. The random access memory RAM outputs a read data signal d2 read out of the test pattern for memory in response to a read command signal d1 arising from the test pattern for logic and passing through the combination logic circuit, a test result arising from the read data signal and passing through the combination logic circuit 6 is input into the scan chain 11, and the scan chain shifts out the test result.
      COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:提供能够对RAM周围的系统逻辑电路进行速度测试的半导体集成电路。 解决方案:半导体集成电路包括用于在清除随机存取存储器RAM的故障测试之后将用于存储器的测试图案写入随机存取存储器的存储器BIST电路4,用于执行随机存取存储器RAM的故障测试的扫描链11 在不改写存储器的测试图案的情况下,通过自动模式生成产生的逻辑的测试模式,以及能够与扫描链构成系统逻辑电路2的组合逻辑电路6。 随机访问存储器RAM响应于从用于逻辑的测试模式产生的读取命令信号d1并通过组合逻辑电路输出从测试图案读出的读取数据信号d2,读取数据产生的测试结果 信号并通过组合逻辑电路6被输入到扫描链11中,并且扫描链移出测试结果。 版权所有(C)2007,JPO&INPIT
    • 73. 发明专利
    • Method for resolving hold error of scan chain
    • 解决扫描链错误的方法
    • JP2006258694A
    • 2006-09-28
    • JP2005078856
    • 2005-03-18
    • Fujitsu Ltd富士通株式会社
    • SAKUMA SHOJIFUKAZAWA SHINJI
    • G01R31/28
    • G01R31/318594
    • PROBLEM TO BE SOLVED: To provide a method for resolving hold errors of a scan chain for resolving hold errors in a data-holding circuit, suppresses the number of buffer circuits inserted between each data-holding circuit, to reduce processing time required for correction processing of the hold errors.
      SOLUTION: The hold error resolving method for the scan chain resolves the hold errors of the scan chain connecting a plurality of data holding circuits 1a-1f. In the method, each data-holding circuit is reordered so as to utilize wiring connected between the data-holding circuits as the delay elements for resolving the hold errors of the scan chain.
      COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:提供一种解决用于解决数据保持电路中的保持误差的扫描链的保持误差的方法,抑制插入在每个数据保持电路之间的缓冲电路的数量,以减少所需的处理时间 用于校正处理保持误差。 解决方案:扫描链的保持误差分解方法解决连接多个数据保持电路1a-1f的扫描链的保持误差。 在该方法中,每个数据保持电路被重新排序,以利用连接在数据保持电路之间的布线作为用于解决扫描链的保持错误的延迟元件。 版权所有(C)2006,JPO&NCIPI
    • 74. 发明专利
    • Scan test circuit
    • 扫描测试电路
    • JP2006145307A
    • 2006-06-08
    • JP2004333913
    • 2004-11-18
    • Sanyo Electric Co Ltd三洋電機株式会社
    • KOISHIKAWA SATORUWATANABE TADASHI
    • G01R31/28G06F11/22H01L21/822H01L27/04
    • G01R31/318544G01R31/318594
    • PROBLEM TO BE SOLVED: To reduce a test cost by curtailing time required for a scan test with respect to a scan test circuit. SOLUTION: As to this scan test circuit, the cycle of a clock in shift operation is made shorter than the cycle of the clock in capture operation. For example, the cycle of the clock in the shift operation is set at 20 nano-seconds while the cycle of the clock in the capture operation is set at 100 nano-seconds. The clock is supplied from an LSI tester outside an LSI via a clock terminal CLK and the cycle of the clock can be changed over in synchronization with the change of a scan enabling signal SCANEN on the LSI tester side. Time occupied by the shift operation is shortened to make it possible to shorten the time required for the scan test. COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:通过缩短扫描测试电路所需的时间来降低测试成本。

      解决方案:对于该扫描测试电路,移位操作中的时钟周期短于捕获操作中的时钟周期。 例如,将移位操作中的时钟周期设定为20纳秒,而捕捉操作中的时钟周期设定为100纳秒。 该时钟通过时钟端子CLK从LSI外部的LSI测试仪提供,并且可以与LSI测试仪侧的扫描使能信号SCANEN的改变同步地切换时钟周期。 通过换档操作占用的时间缩短,可以缩短扫描测试所需的时间。 版权所有(C)2006,JPO&NCIPI

    • 75. 发明专利
    • Integrated circuit
    • 集成电路
    • JP2006058242A
    • 2006-03-02
    • JP2004242779
    • 2004-08-23
    • Nec Electronics CorpNecエレクトロニクス株式会社
    • TERAI HIROAKI
    • G01R31/28G11C29/02G11C29/12H01L21/822H01L27/04
    • G01R31/318594
    • PROBLEM TO BE SOLVED: To provide an integrated circuit capable of testing efficiently a memory block, in an actually operated clock frequency, in a short time. SOLUTION: This integrated circuit 1 has the memory block 10 having a RAM macro 2, the first and second scanning circuits 7, 8 having a plurality of scanning flip-flops (FF), and a serial access memory BIST circuit 3. The scanning circuit 7 has an input-side scanning FF group 9A, capable of inputting and outputting a data to/from the memory block 10, and the scanning circuit 8 has an output-side scanning FF group 9B, capable of receiving the data from the memory block 10. A normal scan test is carried out in the first test mode, and a BIST signal is output serially, from the serial access memory BIST circuit 3 in the second test mode. A selector 4 selects the BIST signal to be output to the input-side scanning FF group 9A and conducts test for the memory block 10. COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:提供能够在短时间内以实际操作的时钟频率高效地测试存储块的集成电路。 解决方案:该集成电路1具有具有RAM宏2的存储块10,具有多个扫描触发器(FF)的第一和第二扫描电路7,8以及串行存取存储器BIST电路3。 扫描电路7具有输入侧扫描FF组9A,能够向/从存储块10输入和输出数据,扫描电路8具有输出侧扫描FF组9B,能够从 存储块10.在第一测试模式下执行正常扫描测试,并且在第二测试模式中从串行存取存储器BIST电路3串行地输出BIST信号。 选择器4选择要输出到输入侧扫描FF组9A的BIST信号,并对存储块10进行测试。版权所有:(C)2006,JPO&NCIPI
    • 76. 发明专利
    • Testing method for semiconductor device and testing circuit of semiconductor device
    • 半导体器件的测试方法和半导体器件的测试电路
    • JP2006058152A
    • 2006-03-02
    • JP2004240873
    • 2004-08-20
    • Toshiba Corp株式会社東芝
    • OKADA KOHEIMORI JUNJI
    • G01R31/28G06F11/22H01L21/822H01L27/04
    • G01R31/318594
    • PROBLEM TO BE SOLVED: To reduce a circuit area by reducing the number of circuits added for executing scan tests. SOLUTION: The testing method for a semiconductor device 1 utilizes a test target circuit 2 and a non-test target circuit 3 and also a plurality of holding circuits FF. Each of the holding circuits FF fetches and holds data based on a clock. The semiconductor circuit 1 contains a plurality of first scan chains 5A constituted by connecting the holding circuits FF in the test target circuit 2 in serial and a plurality of second scan chains 5B constituted by connecting the holding circuits FF in the non-test target circuit 3. The testing method includes a step for giving testing data to the first and the second scan chains 5A and 5B and a step for inputting the clock in the first scan chain 5A and not inputting the clock in the second scan chain 5B. COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:通过减少执行扫描测试所添加的电路数来减少电路面积。 解决方案:半导体器件1的测试方法利用测试目标电路2和非测试对象电路3以及多个保持电路FF。 每个保持电路FF基于时钟取出和保存数据。 半导体电路1包含多个第一扫描链5A,其通过将测试对象电路2中的保持电路FF串联连接而构成,以及通过将非测试对象电路3中的保持电路FF连接而构成的多个第二扫描链5B 测试方法包括向第一和第二扫描链5A和5B提供测试数据的步骤以及用于在第一扫描链5A中输入时钟并且不在第二扫描链5B中输入时钟的步骤。 版权所有(C)2006,JPO&NCIPI