Thin-film, cross-field, closed-flux, anisotropic electromagnetic field device
US4751598A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 1, 1985 |
| Grant date | Jun 14, 1988 |
| Priority date | — |
| Expiry date | Feb 1, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/4969
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A thin-film, cross-field, closed-flux, anisotropic electromagnetic field device for recording images on and reading them from magnetic media, such as a magnetic disk, tape or drum. The device is characterized by two orthogonally related conductors which couple electromagnetically with magnetic coupling structure. One portion of such structure substantially completely surrounds one of the conductors relative to the direction of current flow therein, this portion being anisotropic, and having an easy axis of magnetization that parallels such current flow. With the device in use, this easy axis is intended for operative coupling alignment normally relative to the recording surface in the selected recording medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.