Write head collision detection using MR read element in disc drives
US6822814B2 · kind B2 · utility
8Cited by
25References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2001 |
| Grant date | Nov 23, 2004 |
| Priority date | — |
| Expiry date | May 10, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and associated method for detecting head collision with disc media, or other matter, during a write operation is disclosed. The method and apparatus generally monitor the resistance of an MR element on the head in order to detect a temperature increases indicative of a head collision. The resistance can be compared to a pre-selected threshold to generate an output indicative of head collision.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.