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This paper describes the experiences and operational parameters of the Josephson voltage system cooled by closed cycle refrigerator produced by HYPRES, INC., USA and operated in CZECH METROLOGY INSTITUTE. The change of the cooling system was required and the new cooling system was implemented by SUPRACON AG. The overall increase in operational parameters of the system was observed.
Thermal measurement of simple components (transistors, diodes) is a well-defined task. However, power steps applied on complex structures such as smart-power devices, RAM modules or voltage regulators cause electric transients in the millisecond order. As an interesting portion of thermal transients characterising the die attach quality of the chips lies in the mus range, proper measurement techniques...
Cooling is important to keep the temperatures of the highly integrated silicon electronic devices and power devices e.g. power MOSFET, IGBT. Yamaguchi et al. have proposed a new scheme to cool down the devices by its own current named ldquoself-cooling devicerdquo, in which the cooling process uses Peltier effect. In the proposed scheme, we should use the materials that have high thermal conductivity,...
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...
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