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To assess their potential for interconnect applications, the interplay between electrical and thermal transport in carbon nanofibers (CNFs) under high-current stresses is examined. Electrical properties of CNFs bridging tungsten-deposited gold electrodes are measured. Average voltage is recorded as a function of current in each current stress cycle, and the resulting average resistance is shown to...
To study the reliability of carbon nanofiber (CNF) interconnect under high-current stress, electrical and thermal transports across CNF-electrode interfaces and between electrodes are considered. For this investigation, three different types of contacts are examined: (a) CNF-Au electrode, (b) CNF-SiO2 substrate, and (c) tungsten-deposited CNF-Au electrode. We have determined that contact (c) improves...
To study the reliability of carbon nanofibers (CNFs) under high-current stress, electrical measurements of CNF breakdown are performed for four configurations: (a) suspended, (b) supported, (c) suspended with tungsten deposited onto the CNF-electrode contact, and (d) supported with tungsten deposition. Supported CNF has enhanced current capacity, consistent with improved heat transport to the substrate,...
Current-induced breakdown phenomena of carbon nanofibers (CNFs) for future on-chip interconnect applications are presented. The effect of heat dissipation via the underlying substrate is studied using different experimental configurations. Scanning electron microscopy (SEM) techniques are utilized to study the structural damage by current stress. While the measured maximum current density in the suspended...
To carry out a systematic reliability study of carbon nanofibers (CNFs) under high-current stress, detailed electrical analysis of CNF breakdown is performed on four configurations using current annealing. This investigation can be described with a heat transport model that takes into account Joule heating and heat dissipation along the CNF, and assuming that breakdown occurs where the temperature...
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