Superconducting quantum interference device having thin film Josephson junctions
US4403189A · kind A · utility
117Cited by
6References
6Claims
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Key dates
| Filing date | Aug 25, 1980 |
| Grant date | Sep 6, 1983 |
| Priority date | — |
| Expiry date | Aug 25, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/846
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Thin film Josephson junctions are combined with a block of superconductive material to form a low inductance dc SQUID having very high sensitivity. The block has a toroidal cavity with a circular opening or gap between the cavity and one face of the block. A pair of Josephson junctions, using planar thin film technology, are formed on a substrate and clamped against the block so that the two junctions in series bridge the gap, the junctions and the block combining to form a superconductive closed loop with two junctions in the loop. Coils in the toroidal cavity are inductively coupled to this closed loop.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.