Method producing an SNS superconducting junction with weak link barrier

US5945383A · kind A · utility

Assignee

• The United States of America as represented by the Administrator of the National Aeronautics and Space Administration · US

Inventor

• Brian D. Hunt · Oroville, US

Key dates

• Filing date: Mar 19, 1992
• Grant date: Aug 31, 1999
• Expiry date: Mar 19, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S505/732

Abstract

A method of producing a high temperature superconductor Josephson element and an improved SNS weak link barrier element is provided. A YBaCuO superconducting electrode film is deposited on a substrate at a temperature of approximately 800.degree. C. A weak link barrier layer of a nonsuperconducting film of N--YBaCuO is deposited over the electrode at a temperature range of 520.degree. C. to 540.degree. C. at a lower deposition rate. Subsequently, a superconducting counter-electrode film layer of YBaCuO is deposited over the weak link barrier layer at approximately 800.degree. C. The weak link barrier layer has a thickness of approximately 50 .ANG. and the SNS element can be constructed to provide an edge geometry junction.