Fine thermoelectric elements were fabricated on electrode chips by welding together the tips of thin 5 μm diameter Pt and W wires by Joule heat welding. The Pt/W junction was heated by bringing it into contact with a wire carrying a current, thus generating a voltage due to the Seebeck effect in the circuit containing the junction. The Pt/W junctions of two thermoelectric elements in separate circuits were brought into contact with each other. Current was supplied to one of the thermoelectric elements, while the temperature was measured using the other element as a thermocouple. The temperature, which is due to the Peltier effect, was found to depend on the direction of current supply.
Joule Heat Welding of Thin Platinum and Tungsten Wires and the Thermoelectric Effects Around Bi-Metal Junctions
Contributed by the Manufacturing Engineering Division of ASME for publication in the JOURNAL OF MICRO- AND NANO-MANUFACTURING. Manuscript received January 19, 2012; final manuscript received February 20, 2013; published online April 17, 2013. Assoc. Editor: J. Rhett Mayor. Paper presented at the 2011 International Electronic Packaging Technical Conference and Exhibition (IPACK2011), Portland, Oregon, July 6–8, 2011.
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Tohmyoh, H., Tanaka, T., Fujimori, M., and Saka, M. (April 17, 2013). "Joule Heat Welding of Thin Platinum and Tungsten Wires and the Thermoelectric Effects Around Bi-Metal Junctions." ASME. J. Micro Nano-Manuf. June 2013; 1(2): 024501. https://doi.org/10.1115/1.4024082
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