Grain size control of superconducting materials in thin films for Josephson junctions

US11552237B2 · kind B2 · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Benjamin Wymore · Somers, US
• Christian Lavoie · Ossining, US
• Markus Brink · White Plains, US
• John Bruley · Poughkeepsie, US

Key dates

• Filing date: Aug 19, 2020
• Grant date: Jan 10, 2023
• Expiry date: Aug 19, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10N60/85

Abstract

A superconducting circuit includes a Josephson junction device including a lower superconducting material layer formed on a substrate and a junction layer formed on the lower superconducting material layer. The superconducting circuit also includes an upper superconducting material layer formed over the junction layer. At least the lower superconducting material layer comprises grains having a size that is larger than a size of the Josephson junction.