Patent ID: 8306590

Claim:
A contact made by a process comprising the steps of: making a groove at the end of a superconductor, depositing a first silver layer by metal spray gun at a temperature of 120° C., heating the deposited silver layer at a temperature in a range of 200-250° C. for a time period in the range of 2-5 hrs, wrapping a perforated silver foil on the heat treated first silver layer, depositing a second silver layer by metal spray gun at a temperature of 120° C., heating the combination of first silver layer, wrapped perforated silver foil and second silver layer at a temperature in a range of 830-850° C. in air for a time period in the range of 100-150 hrs, wherein contact resistance is in a range of 3.07×10 −6 to 3.0×10 −7 Ω in zero applied magnetic field at 77K.