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A module for insulatively housing and refrigerating a semiconductor device which is designed to be plugged into a printed circuit board within a conventional air-cooled electronic system. The plug-in module is designed such that the semiconductor device within the module can be operated at temperatu

A module for insulatively housing and refrigerating a semiconductor device which is designed to be plugged into a printed circuit board within a conventional air-cooled electronic system. The plug-in module is designed such that the semiconductor device within the module can be operated at temperatures from -200°C. down to the temperatures of liquid helium, while a short distance below the housing portion of the module the plug-in conductors connect to a connector on a conventionally cooled processor board. This is accomplished without frost or other type of troublesome moisture forming on the plug-in conductors.

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A low thermal conductance electrical connection apparatus for use between a lead of a semiconductor device and a receptacle of a connector mounted upon a printed circuit board, comprising: a first member having a receptacle on a first end for receiving said lead of said semiconductor device and a se

A low thermal conductance electrical connection apparatus for use between a lead of a semiconductor device and a receptacle of a connector mounted upon a printed circuit board, comprising: a first member having a receptacle on a first end for receiving said lead of said semiconductor device and a second end opposite said first end; an electrical conductor member, including: a thin-walled stainless steel tube member having a low thermal conductance; and a coating, that is thin relative to the thickness of the wall of said stainless steel tube member, of a metal having a high electrical conductance; said electrical conductor member having a first end connected to said second end of said first member; and a second end of said electrical conductor member connected to the receptacle of the printed circuit board connector; whereby said electrical conductor member has a good electrical conductance and a low thermal conductance.