Magnetic recording/playback head comprising a superconducting material
US4979064A · kind A · utility
7Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1988 |
| Grant date | Dec 18, 1990 |
| Priority date | — |
| Expiry date | Oct 26, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a magnetic head, there is provided, in the gap, a superconducting material that has zero permeability and prevents the passage of the magnetic field in the gap. Various alternative embodiments are used to improve the efficiency of the head by channelling the magnetic flux outside the gap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.