Active superconducting devices formed of thin films

Details Active superconducting devices formed of thin films Active superconducting devices formed of thin films

1989-08-18

1991-05-28

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307245, 357 5, 505865, 505874, H03K 338, H03K 1792

Patent

active

050197215

ABSTRACT:
Active superconducting devices are formed of thin films of superconductor which include a main conduction channel which has an active weak link region. The weak link region is composed of an array of links of thin film superconductor spaced from one another by voids and selected in size and thickness such that magnetic flux can propagate across the weak link region when it is superconducting. Magnetic flux applied to the weak link region will propagate across the array of links causing localized loss of superconductivity in the links and changing the effective resistance across the links. The magnetic flux can be applied from a control line formed of a superconducting film deposited coplanar with the main conduction channel and weak link region on a substrate. The devices can be formed of any type to superconductor but are particularly well suited to the high temperature superconductors since the devices can be entirely formed from coplanar films with no overlying regions. The devices can be utilized for a variety of electrical components, including switching circuits, amplifiers, oscillators and modulators, and are well suited to microwave frequency applications.

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