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    • 4. 发明申请
    • Designing Scan Chains With Specific Parameter Sensitivities to Identify Process Defects
    • 设计具有特定参数敏感度的扫描链来识别过程缺陷
    • US20060026472A1
    • 2006-02-02
    • US10710642
    • 2004-07-27
    • James AdkissonGreg BazanJohn CohnMatthew GradyLeendert HuismanMark JaffePhillip NighLeah PastelThomas SopchakDavid SweenorDavid Vallett
    • James AdkissonGreg BazanJohn CohnMatthew GradyLeendert HuismanMark JaffePhillip NighLeah PastelThomas SopchakDavid SweenorDavid Vallett
    • G06F17/50G01R31/28
    • G06F17/5045G01R31/31855G01R31/318586H01L22/34H01L2924/0002H01L2924/00
    • A method is disclosed for designing scan chains in an integrated circuit chip with specific parameter sensitivities to identify fabrication process defects causing test fails and chip yield loss. The composition of scan paths in the integrated circuit chip is biased to allow them to also function as on-product process monitors. The method adds grouping constraints that bias scan chains to have common latch cell usage where possible, and also biases cell routing to constrain scan chain routing to given restricted metal layers for interconnects. The method assembles a list of latch design parameters which are sensitive to process variation or integrity, and formulates a plan for scan chain design which determines the number and the length of scan chains. A model is formulated of scan chain design based upon current state of yield and process integrity, wherein certain latch designs having dominant sensitivities are chosen for specific ones of the scan chains on the chip. The model is provided as input parameters to a global placement and wiring program used to lay out the scan chains. Test data on the chip is then analyzed to determine and isolate systematic yield problems denoted by attributes of a statistically significant failing population of a specific type of scan chain.
    • 公开了一种用于设计具有特定参数灵敏度的集成电路芯片中的扫描链的方法,以识别导致测试失败和芯片产量损失的制造工艺缺陷。 集成电路芯片中的扫描路径的组成被偏置以允许它们也用作产品过程监视器。 该方法增加了分组约束,使得扫描链偏置以在可能的情况下具有共同的锁存单元使用,并且还偏置小区路由以将扫描链路由限制到用于互连的给定受限金属层。 该方法组合了对过程变化或完整性敏感的锁存器设计参数列表,并且制定了扫描链设计的计划,该计划决定了扫描链的数量和长度。 基于产量和过程完整性的当前状态来制定扫描链设计的模型,其中为芯片上的特定扫描链选择具有主要灵敏度的某些锁存器设计。 该模型作为输入参数提供给用于布置扫描链的全局放置和布线程序。 然后对芯片上的测试数据进行分析,以确定和分离由特定类型的扫描链的统计学显着失败群体的属性表示的系统产量问题。
    • 10. 发明申请
    • AN APPARATUS AND METHOD FOR TRANSMISSION AND REMOTE SENSING OF SIGNALS FROM INTEGRATED CIRCUIT DEVICES
    • 集成电路设备信号的传输和远程感测的装置和方法
    • US20060022671A1
    • 2006-02-02
    • US10710683
    • 2004-07-28
    • Theodore LevinDavid Vallett
    • Theodore LevinDavid Vallett
    • G01R33/02
    • G01R31/2886G01R15/20G01R31/3004G01R31/3025
    • An apparatus and a method for testing semiconductor devices, such as individual integrated circuits in semiconductor chips, by directing a current in each circuit through a respective selected predetermined path to establish, in each circuit, a respective focused magnetic field and converting each such magnetic field into a respective voltage which, when fed to respective amplifier gated with a respective selected frequency, will modulate each such respective voltage. Each such respective voltage is then used to create a respective pulsating magnetic field that when detected by a respective remote magnetic sensor will provide a series of respective signals representative of the current in the respective circuit from which the pulsating magnetic field was derived. By applying each such series of voltages to a lock-in amplifier synchronized at the respective frequencies gating each respective amplifier the current in each circuit being tested can be accurately determined and will be free of errors due to circuit noise or crosstalk between the circuits under test.
    • 一种用于测试半导体芯片中的各个集成电路的半导体器件的装置和方法,通过在每个电路中引导电流通过相应的选定的预定路径,以在每个电路中建立相应的聚焦磁场并将每个这样的磁场 当被馈送到以相应选定频率门控的相应放大器时,将调制每个这样的相应电压。 然后使用每个这样的各个电压来产生相应的脉动磁场,当相应的远程磁传感器检测到时,将提供一系列相应的信号,该信号表示从其产生脉动磁场的相应电路中的电流。 通过将每个这样的一系列电压施加到锁定放大器,该锁定放大器在各自的频率上同步,门控各个放大器,可以精确地确定正在测试的每个电路中的电流,并且将由于被测电路之间的电路噪声或串扰而没有错误 。