Abstract
A very-thin Pt/W thermoelectric element is fabricated on small chip. The Pt and W thin wires having the diameter of 5μm are attached on a Cu electrode chip, and these are electrically isolated by air grove on the chip. The tips of both thin wires are welded by Joule heating. The other ends of wires are connected to a voltmeter and the electro-thermal circuit is constructed. The voltage observed is proportional to the difference in temperature between the dissimilar weld and the chip (room temperature) due to Seebeck effect, and the Seebeck coefficient is found to be about 0.21μV/K. The temperature distribution of 5μm-diameter wire, where the constant current is flowing, is successfully measured by the fabricated very-thin Pt/W thermoelectric element.
