Superconductive integrated circuit incorporating a magnetically controlled interferometer

Patent · Tue Nov 19 04:00:00 EST 1985

OSTI ID:5680649

Jullie, D W; Smith, L N

Superconductive integrated logic gate circuits of the magnetically controlled type incorporating Josephson tunnel junctions utilize a superconductive layer that forms a base electrode for Josephson junction devices on the integrated circuit, a ground plane, and magnetic control lines. A layer of super-conductive material superposed on a barrier layer provides inductive loops connected to junction counterelectrodes and coupled to the magnetic control lines. By patterning the control lines in the same plane as the ground plane-base electrode layer, two layers, an insulating layer and a superconductive layer, can be eliminated from the prior art structure of a 1:2:1 magnetically controlled logic gate interferometer. A preferred embodiment utilizing an all refractory superconductor-barrier-superconductor trilayer patterned by local anodization is also described. Processes for manufacturing the embodiments of the invention are disclosed.

• Assignee: Sperry Corp.
• Patent Number(s): US 4554567
• OSTI ID: 5680649
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANODIZATION
CHEMICAL COATING
CORROSION PROTECTION
DEPOSITION
DESIGN
ELECTRIC CONDUCTIVITY
ELECTRICAL INSULATION
ELECTRICAL PROPERTIES
ELECTROCHEMICAL COATING
ELECTRODES
ELECTROLYSIS
ELECTRONIC CIRCUITS
FABRICATION
FILMS
GATING CIRCUITS
INTEGRATED CIRCUITS
INTERFEROMETERS
JOSEPHSON JUNCTIONS
JUNCTIONS
LOGIC CIRCUITS
LYSIS
MEASURING INSTRUMENTS
MICROELECTRONIC CIRCUITS
PHYSICAL PROPERTIES
REFRACTORIES
SUPERCONDUCTING FILMS
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTIVITY
SURFACE COATING
TUNNEL EFFECT