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    • 12. 发明授权
    • Land grid array socket actuation hardware for MCM applications
    • 用于MCM应用的Land Grid阵列插座致动硬件
    • US06475011B1
    • 2002-11-05
    • US09948195
    • 2001-09-07
    • Arvind K. SinhaRoger D. HamiltonJohn L. ColbertJohn S. Corbin, Jr.Danny E. Massey
    • Arvind K. SinhaRoger D. HamiltonJohn L. ColbertJohn S. Corbin, Jr.Danny E. Massey
    • H01R1362
    • H05K3/325H01R43/205
    • An apparatus for applying force to a multi-chip module, a printed wiring board and an interposer to facilitate electrical contact there-between, includes a plurality of load posts, a load transfer plate, a spring member, a backside stiffener plate and a spring actuator. The load posts are affixed to the multi-chip module and pass through the printed wiring board. The load transfer plate has a first stiffness. The spring member is disposed adjacent the load transfer plate and has a second stiffness that is less than the first stiffness. The a backside stiffener plate is disposed between the spring member and the printed wiring board and has a third stiffness that is greater than the second stiffness. The spring actuator engages the spring member to apply force to the backside stiffener plate, causing the substrate, the interposer and the printed wiring board to be held in contact.
    • 一种用于向多芯片模块施加力的装置,印刷线路板和插入件,以便于其间的电接触,包括多个负载柱,负载传递板,弹簧构件,后侧加强板和弹簧 执行器。 负载柱固定在多芯片模块上并通过印刷电路板。 载荷传递板具有第一刚度。 弹簧构件设置在负载传递板附近并且具有小于第一刚度的第二刚度。 背面加强板设置在弹簧构件和印刷线路板之间,并且具有大于第二刚度的第三刚度。 弹簧致动器接合弹簧构件以向后侧加强板施加力,使得基板,插入器和印刷线路板保持接触。
    • 19. 发明授权
    • Providing thermal compensation for topographic measurement at an elevated temperature using a non-contact vibration transducer
    • 使用非接触式振动传感器,在高温下提供对地形测量的热补偿
    • US08705050B2
    • 2014-04-22
    • US12898783
    • 2010-10-06
    • Arvind K. Sinha
    • Arvind K. Sinha
    • G01B11/30
    • G01B11/24
    • A mechanism for providing thermal compensation when measuring surface topography at an elevated temperature using a non-contact vibration transducer, such as a laser Doppler vibrometer (LDV). Thermal compensation is provided to a detector output signal to correct for thermal diffraction of a reflected portion of a beam of radiant energy directed at a surface of a test object. The thermal compensation is based on a calculated deviation between the detector output signal r2 at an elevated temperature and the detector output signal r1 at approximately room temperature. In one embodiment, the thermal compensation mechanism calculates a stationary signal r3(t) which represents the detector output signal without noise and corrected for thermal diffraction at the elevated temperature according to the following equation: r 3 ⁡ ( t ) = lim T → ∞ ⁢ 1 / T ⁢ ∫ - t / 2 + t / 2 ⁢ r 2 * ⁡ ( t ) * r 2 * ⁡ ( t + Δ ⁢ ⁢ t ) ⁢ ⁢ ⅆ t , wherein T represents the total number of spectrums measured at the elevated temperature at multiple times upon which the compensation is based, and wherein r2*=r2−r2(baseline).
    • 使用诸如激光多普勒振动计(LDV)的非接触式振动传感器在高温测量表面形貌时提供热补偿的机构。 将热补偿提供给检测器输出信号,以校正指向测试对象表面的辐射能束的反射部分的热衍射。 热补偿基于在升高的温度下的检测器输出信号r2与大约室温下的检测器输出信号r1之间的计算偏差。 在一个实施例中,热补偿机构根据以下等式计算表示无噪声的检测器输出信号的稳定信号r3(t),并根据以下等式对升高的温度下的热衍射进行校正:r 3⁡(t)= lim T→∞ 1 /T∫-t / 2 + t / 2r 2 *⁡(t)* r 2 *⁡(t +&Dgr;⁢t)⁢ⅆt,其中T表示测量的光谱总数 在补偿所基于的多次的高温下,其中r2 * = r2-r2(基线)。