International Business Machines Corporation

Allan David Marwick

Richard Joseph Gambino

Robert B Laibowitz

Roger Hilsen Koch

Corwin Paul Umbach

Gregory John Clark

A superconducting device operable at temperatures in excess of 30&#xb0; K. and a method for making the device are described. A representative device is an essentially coplanar SQUID device formed in a single layer of high Tsuperconducting material, the SQUID device being operable at temperatures in excess of 60&#xb0; K. High energy beams, for example ion beams, are used to convert selected portions of the high Tsuperconductor to nonsuperconductive properties so that the material now has both superconductive regions and nonsuperconductive regions. In this manner a superconducting loop having superconducting weak links can be formed to comprise the SQUID device.

Method for making a superconductor device

A superconducting device operable at temperatures in excess of 30.degree. K. and a method for making the device are described. A representative device is an essentially coplanar SQUID device formed in a single layer of high T.sub.c superconducting material, the SQUID device being operable at temperatures in excess of 60.degree. K. High energy beams, for example ion beams, are used to convert selected portions of the high T.sub.c superconductor to nonsuperconductor properties so that the material now has both superconductive regions and nonsuperconductive regions. In this manner a superconducting loop having superconducting weak links can be formed to comprise the SQUID device.

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Yorktown Heights, NY, United States of America

Allan David Marwick