Measuring method of a magnetic head and measuring apparatus thereof
US8493683B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 2011 |
| Grant date | Jul 23, 2013 |
| Priority date | — |
| Expiry date | Jan 18, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/455
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Measuring method of a magnetic head includes (a) placing the magnetic head at normal position, defining a first direction parallel to an air bearing surface and two shielding layers of the magnetic head, and defining a second direction perpendicular to the first direction; (b) tilting the magnetic head at an angle to the second direction, applying a plurality of first magnetic fields with different intensities in the first direction, and measuring out a first output parameter curve; (c) repeating the step (b) with different angles and measuring out a plurality of first output parameter curves; (d) calculating a plurality of pinned direction tilt ratios that a pinned direction of a pinned layer of the magnetic head tilts towards the second direction according to the parameter curves; and (e) calculating a pinned direction tilt angle that the pinned direction tilts towards the second direction according to the pinned direction tilting ratios.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.