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    • 5. 发明授权
    • Stress migration evaluation method
    • 压力迁移评估方法
    • US5930587A
    • 1999-07-27
    • US917955
    • 1997-08-27
    • Vivian W. Ryan
    • Vivian W. Ryan
    • H01L21/66H01L21/44
    • H01L22/24Y10S148/003Y10S148/162Y10S438/927
    • A method for accurately and objectively evaluating stress migration effects on long term reliability of integrated circuits. A sample containing a conductive runner is fabricated according to a given fabrication process. The fabricated sample undergoes a heating step at a first temperature for a first time period to induce material interactions at an accelerated rate, followed by cooling the sample to a second temperature and maintaining the second temperature for a time of sufficient duration such that relaxation occurs. Then the sample undergoes a heating process at a third temperature for a time sufficient to nucleate a predetermined number of voids, followed by heating the sample runner at a fourth temperature, less than than the third temperature, to propagate the voids such that a maximum void size is determined. Void distribution is preferably monitored by optical and scanning electron microscopy. By analyzing the void size distribution data for the isothermal void propagation annealing, a measure of the long term reliability is provided.
    • 准确,客观地评估应力迁移对集成电路长期可靠性的影响的方法。 根据给定的制造工艺制造包含导电流道的样品。 所制造的样品在第一温度下经历加热步骤,以第一时间段以加速速率诱导材料相互作用,随后将样品冷却至第二温度,并将第二温度保持足够的持续时间以使得发生弛豫。 然后,样品在第三温度下进行加热过程足以将预定数量的空隙成核,然后在小于第三温度的第四温度下加热样品流道,以使空隙传播,使得最大空隙 尺寸是确定的。 优选通过光学和扫描电子显微镜监测空隙分布。 通过分析等温空隙传播退火的孔径分布数据,提供了长期可靠性的测量。