Grain boundary junctions in high temperature superconductor films

US5157466A · kind A · utility

Assignee

• Conductus, Inc. · US

Inventors

• Kookrin Char · Palo Alto, US
• Stephen M. Garrison · Palo Alto, US
• Nathan Newman · Beverly Hills, US
• Gregory Zaharchuk · San Francisco, US

Key dates

• Filing date: Mar 19, 1991
• Grant date: Oct 20, 1992
• Expiry date: Mar 19, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S505/702

Abstract

Grain boundary, weak-link junctions are formed at a predermined location of a uniform, planar substrate by depositing superconducting film on two sections of the substrate. The film is grown as a bicrystal having two distinct areas of superconducting film whose crystal lattices are rotated with respect to each other, either in-plane or out-of-plane, by more than 5.degree. and less than 90.degree.. The grain boundary acts as a weak link junction. The film can be induced to grow as a bicrystal by depositing intermediate strata such as seed layers or buffer layers or by modifying the growth conditions during deposition.