Josephson junction device comprising high critical temperature crystalline copper superconductive layers
US5552373A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1992 |
| Grant date | Sep 3, 1996 |
| Priority date | — |
| Expiry date | Apr 10, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N60/124
Abstract
A Josephson junction device is disclosed having a substrate upon which are located overlying and underlying high critical temperature crystalline oxide superconductive layers separated by an interposed impedance controlling layer. The underlying superconductive layer is limited to a selected area of the substrate while the overlying and interposed layers overlie only a portion of the underlying superconductive layer. Nonsuperconducting oxide layer portions laterally abut the superconductive and interposed layers. A first electrical conductor is attached to the underlying superconductive layer at a location free of overlying oxide layers, and a second electrical conductor contacts the overlying superconductive layer and extends laterally over the adjacent laterally abutting nonsuperconductive layer portion. A process is disclosed for preparing the Josephson junction device in which a Josephson junction layer sequence is deposited on a substrate, a portion of the Josephson junction layer sequence laterally abutting a selected area is converted to a nonsuperconducting form, within the selected area overlying layers are removed from the superconducting layer nearer the substrate, and a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.