Abstract
A paper by Gmelin et al examines the thermal contact resistancebetween copper surfaces above 1 K. It was concluded thatdielectric and metallic interposers significantly increasethe conductance of demountable joints. I argue that an extrapolationof electrical resistance measurements, andof thermal measurements at lower temperatures,implies that it is possible to construct considerablybetter joints without interposers. Moreover, dielectric interposerswould reduce the conductance of such joints.
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