Magnetic head and multitrack transducer for perpendicular recording and method for fabricating
US4423450A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 6, 1981 |
| Grant date | Dec 27, 1983 |
| Priority date | — |
| Expiry date | May 6, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/4969
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved recording and read head particularly suited for use with perpendicular recording techniques. The recording head can be fabricated either as a single head or as a multitrack array. If fabricated as a multitrack array, the head includes a plurality of main poles spaced closely to one another and a common long flux closing pole which completes a magnetic circuit between the main poles and the recording medium. Each main pole of the head array is individually addressable with a purpose of recording or reading by means of a flux gate arrangement. The flux gate may be utilized so that the head operates either in a conventional fashion by detecting the rate of change of induced flux or by detecting the magnitude of the induced flux.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.