Thick film resistance thermometer

Details Thick film resistance thermometer Thick film resistance thermometer

1977-01-17

1979-04-03

Esposito, Michael F.

Metal working

Method of mechanical manufacture

Electrical device making

29620, 427102, 427125, 427282, 427376A, 427376B, 427383A, 427383B, 252514, 338 25, 338 28, B05D 512, B05D 132, H01C 702, H01C 1700

Patent

active

041469577

ABSTRACT:
A folded, highly pure platinum, thick film, path on a ceramic cylindrical substrate provides a high TCR of about 3850 ppm/.degree. C. The path is applied by screen printing a thick film paste onto a substrate and then firing the paste at a time and temperature sufficient to bond the path to the substrate and to produce a TCR of at least about 3850 ppm/.degree. C. The paste is comprised of about 20% by weight of an organic carrier into which 80% by weight of particles have been mixed. The particles are 96% by weight platinum particles of less than about ten microns size and 4% by weight of a contaminant-free vitreous glass frit of less than ten microns size.

REFERENCES:
patent: 3629776 (1971-12-01), Watano
patent: 3699650 (1972-10-01), Cocca
patent: 3781749 (1973-12-01), Iles et al.
patent: 4028657 (1977-06-01), Reichelt
patent: 4050052 (1977-09-01), Reichelt
McGraw Hill Encyclopedia of Science and Technology, p. 418, (Definition of micron).

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