Magnetic head
US4641213A · kind A · utility
2Cited by
4References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1984 |
| Grant date | Feb 3, 1987 |
| Priority date | — |
| Expiry date | Jul 16, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3109
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A cobalt-base ternary alloy containing small amounts of hafnium and tantalum formed by sputtering, vapor deposition, etc., is used as the principal magnetic pole of a magnetic head for perpendicular magnetic recording, the core thin layers of a thin layer magnetic recording head, or the magnetic shield thin layers of a thin layer magnetic reproducing head. The ternary amorphous alloy has a high permeability and a high saturation magnetic flux density and hence the thickness of the foregoing layers composed of the alloy can be reduced as thin as possible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.