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This paper presents a current measurement setup to determine polarization and conduction processes of solid insulation materials under HVDC stress. The setup enables simultaneous polarization, depolarization, and conduction current measurements of up to four material samples. The volume or surface current measurements are performed in a pressure vessel, adjustable to the whole range of possible long-term...
Surface resistance measurements on insulating solids are usually performed by measuring the current induced when an electric field tangential to the surface is applied. The measured current results from the addition of currents flowing along the surface, and also partly in the volume. In this paper, surface current measurements on an alumina-filled epoxy resin are performed under varying conditions...
The present work aims at studying the cooling performance of a thermoelectric device that integrated with integrated heat spreader (IHS) on a flip-chip plastic ball grid array (FC-PBGA) package. The new thermoelectric device herein is fabricated on the metal substrates by flip-chip assembly process. Thermal performance of the new package was comprehensive studied. The thermal resistances of IHS with/without...
The real time monitoring and control of resistance spot welds is a problem of critical importance in automotive and many other manufacturing industries. However, till this date, there are no reliable, low-cost, non-destructive techniques for predicting the size and strength of the weld nuggets in real time. This paper investigates the usage of voltage, current, and force data for the above tasks....
Thick film resistance and capacitance elements have recently come to be used in miniaturized and lightweight electronic instruments. The thick-film magnetic semiconductor (IMS), with a thickness of 80 ??m, is a sintered substance based on ferrite powder and a ruthenium compound. The TMS has both the ferromagnetic and the semiconducting properties of the ferrite and the ruthenium compound. The TMS...
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