Abstract
It is shown how to make compact, thermally grounded terminal strips for electrical leads in cryostats from flexible electrical laminates composed of copper foil bonded to a polyimide film. Laminates of lead foil and polyimide film are used to make a superconducting strip line, a type of transmission line in which it is easy to thermally ground both conductor and shield. The thermal resistance across a laminate was measured between 0.02 and 4 K from which the thermal conductivity of polyimide film is deduced between 0.1 and 4 K.
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