Superconducting circuit sub-assembly having an oxygen shielding

Details Superconducting circuit sub-assembly having an oxygen shielding Superconducting circuit sub-assembly having an oxygen shielding

1994-06-09

1995-12-12

Ryan, Patrick J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428930, 428901, 428688, 428210, 505812, 505813, 361748, 361750, 361751, B32B 900

Patent

active

054748348

ABSTRACT:
A circuit sub-assembly as a mounting for an electronic component such as Josephson device, i.e., a superconducting element, comprises a ceramic insulating substrate, an oxygen-shielding barrier layer formed on the insulating substrate, and a circuit film of niobium, as a superconducting material formed on the barrier layer according to a desired pattern. The barrier layer prevents oxidation of the circuit layer by shielding it from oxygen present in the insulating substrate. Due to the barrier layer, the circuit film is scarcely subject to superconductivity-impairing oxidation. The circuit film is thus capable of high-speed electronic signal conduction.

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Holmes, Handbook of Thick Film Technology Electrochemical Publ. Lim., 1976, pp. 74-75.
Tummala et al., "Microelectronics Packaging Handbook" Ch. 6, 1988, pp. 368-373.

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