Magnetic head structure with reduction of magnetic domain instability
US5617278A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1995 |
| Grant date | Apr 1, 1997 |
| Priority date | — |
| Expiry date | Mar 20, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3113
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Boundary protrusions or kinks are integrally formed along the perimeter of a magnetic layer of a magnetic transducer for nucleating a predetermined domain pattern in the magnetic layer. These protrusions or kinks behave as domineering pinning sites for the domain walls, overriding other factors such as manufacturing tolerances or external magnetic field, for establishing a stable magnetic domain pattern. As arranged, various kinds of noise encountered during the normal operations of the transducer are significantly reduced, as the noise related problems originated from the magnetic domain instabilities in the magnetic layers are substantially curtailed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.