Method for characterizing a perpendicular recording head writing pole
US6969989B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 11, 2005 |
| Grant date | Nov 29, 2005 |
| Priority date | — |
| Expiry date | Mar 11, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/1278
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method characterizes a generally-trapezoidally-shaped portion of a writing pole of a perpendicular magnetic write head in proximity to a magnetic medium. The method includes providing measured track width data corresponding to magnetic track widths of a plurality of tracks written by the writing pole on a rotating magnetic medium underlying the writing pole. The magnetic track widths vary as a function of skew angle of the writing pole during writing. The method further includes determining a magnetic width of the wider of a leading edge and a trailing edge of the writing pole from a first portion of the measured track width data corresponding to a first range of skew angles. The method further includes determining at least one magnetic taper angle of the writing pole from the measured track width data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.