Magnetic sensor and a method and device for mapping the magnetic field or magnetic field sensitivity of a recording head
US9837108B2 · kind B2 · utility
0Cited by
24References
16Claims
0Family size
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Key dates
| Filing date | May 10, 2012 |
| Grant date | Dec 5, 2017 |
| Priority date | — |
| Expiry date | Dec 28, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49004
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention provides a method and apparatus for scanning a read/write head of a hard disk drive during manufacture. The method comprises: providing a magnetic sensor; moving the magnetic sensor relative to and in close proximity to the read/write head under test; obtaining measurements from the head under test or the sensor, representing a two-dimensional magnetic map; processing the map to obtain an accurate map of the head sensitivity of the head under test from which the key performance characteristics of the head can be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.