Contoured pole tip structures for minimizing side track erasure
US6122144A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1997 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | Dec 22, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/312
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A write head is provided that has an "I" shaped pole tip structure. Flux leakage between bottom corners of a top horizontal component to a bottom horizontal component of the "I" shaped pole tip structure is obviated by rounding or tapering the side edges of the top horizontal component as it recesses into the head from the ABS. The angle taken by each recessed side edge with respect to the ABS edge is less than 90.degree. so that flux concentrations at the corners are minimized and flux leakage from these corners to the bottom horizontal component is substantially eliminated. In another embodiment of the invention the top horizontal component is configured with a necked down portion between front and rear portions for minimizing flux saturation of other pole tip components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.