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High Quality Tunnel Junction Devices Using High T(c) Superconductors.
Patent Application, Filed 30 Jun 89,
DEPARTMENT OF THE NAVY WASHINGTON DC
Pagination or Media Count:
This invention relates generally to superconducting devices and, specifically, to tunnel junctions and Josephson junctions in superconducting devices. A structure and method for fabricating tunnel junctions from high transition temperature material are disclosed. A tunnel junction consists of three films successively deposited on a substrate a superconductor, an insulator or normal metal and a superconducting or normal metal. The critical interface is between the superconductor and the insulator or normal metal. Previous attempts to form tunnel junctions have used the upper surface of the superconductor which is invariably rough and inhomogeneous. This invention uses the lower surface which is more epitaxial to fabricate tunnel junctions and Josephson junctions. Patent Applications. AW
APPROVED FOR PUBLIC RELEASE