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The time and temperature dependence of Stress-Induced-Voiding below and in copper VIA's with a diameter of 80 nm integrated in a k = 2.5 material was studied. The focus was on the early phase of the voiding process. To accelerate the degradation, test structures with big metal plates below and/or above the VIA were used. We found two degradation mechanisms in which one dominated below and the other...
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