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In this work, the effect of the grooved elastic damping component on the friction-induced vibration is investigated by using both experimental and numerical analysis. Experimental results show that the Styrene Butadiene Rubber (SBR) with grooves on its surface can reduce the vibration level, suppress the generation of vibration frequency and alleviate the effect of disc surface run-out. To reveal...
ITRS has predicted that integrated chip (IC) packages will have interconnections with I/O pitch of 90 nm by the year 2018. Lead-based solder materials in flip chip technology will not be able to satisfy the thermal mechanical requirement these fine pitches. Of all the known interconnect technologies, nanostructure interconnects such as nanocrystalline Cu are the most promising technology to meet the...
The increased electrical currents used to drive light emitting diode (LED) cause significant heat generation in the solid state lighting (SSL) system. As the temperature will directly affect the maximum light output, quality, reliability and the life time of the SSL system, thermal management is a key design aspect in terms of cost and performance. Particularly for consumer SSL system, natural convection...
In this paper, the Copper wirebonding technology is investigated. From a numerical point of view, the wirebonding process is modelled. Experiments on specially designed bondpads are performed in order to verify the models. As such, this leads to a thorough understanding of the wirebonding process, especially the forces that take a role during this process.
Thin metal films are widely used in modern electro mechanical systems. The need for more integrated functionality and minimization of material and energy consumption leads to miniaturization of these systems. As a consequence, materials are processed on the micro- and nanometer scale. On this scale, material properties become a function of size. To predict performance and reliability, knowledge on...
Turbulent air flow characteristics in a hard disk drive (HDD) model are simulated through a novel non-linear two-equation turbulence model. Simulated numerical results are validated by comparing against a higher order model (RSM) predictions. Comparisons in terms of mean flow characteristics are found to agree well with the RSM model predictions than that of the linear model predictions. The computational...
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