Magnetic head for magnetic recording and reproducing unit
US4888658A · kind A · utility
14Cited by
0References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1988 |
| Grant date | Dec 19, 1989 |
| Priority date | — |
| Expiry date | Apr 1, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49067
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a magnetic head comprising a head gap and a magnetic core composed of both a high permeability ferrite and a magnetic alloy, said magnetic alloy being disposed in the vicinity of said head gap, the improvement comprising a corrugation provided at a junction portion between said ferrite and said magnetic alloy, a height of said corrugation being not less than a value of the longest wavelength of luminance signals and color signals recorded on a magnetic recording medium, a distance defined between adjacent two crests or bottoms of said corrugation being smaller than a width of a head track.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.