Thermoelectric cooler

Details Thermoelectric cooler Thermoelectric cooler

1994-05-24

1995-08-15

Walsh, Donald P.

Batteries: thermoelectric and photoelectric

Thermoelectric

Peltier effect device

136204, 136224, 136237, H01L 3508

Patent

active

054415764

ABSTRACT:
A thermoelectric heat pump which is resistant against thermal stresses incurred during thermal cycling of Thermal Cyclers or the like between cold and hot temperatures of about 0.degree. C. at a ramping rate up to about 1.degree. C. per second has improved joints between the thermoelements and electrical conductors which have low electrical resistance and which substantially reduce fractures during thermal cycling. The joints include a tin-silver-indium solder containing by weight about 95% tin, 3.5% silver, and 1.5% indium, or a tin-silver-cadmium solder containing by weight about 95.5% tin, 3.5% silver, and 1.0% cadmium. A robust nickel diffusion barrier between the joints and thermoelectric elements ends provides additional improvement against joint fracture.

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Leong, et al "Finite-Element Thermal Stress Analysis of a Thermoelectric Cooler" Third International Conference on the Thermoelectric Energy Conversion, UTA, Mar. 12-14, 1980, IEEE Catalog No. 80CH1546-1 Reg 5, pp. 86-91.
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"Thermocycler", MJ Research, Inc. Copyright 1989, pp. 1-3.

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