Magnetic recording head slider with piezoelectric sensor for measuring slider to disc interference levels
US6046871A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1997 |
| Grant date | Apr 4, 2000 |
| Priority date | — |
| Expiry date | Nov 12, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B33/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording head for use in a disc drive system including a rotating disc has a slider body and a transducer on the slider body for reading and/or writing data from and/or to the disc. A piezoelectric sensor is provided on the slider body and produces a signal representing a level of interference between the slider body and the rotating disc. A method of predicting a head crash includes establishing a nominal level of interference between the magnetic recording head and the rotating disc and establishing a threshold interference level difference. The level of interference between the magnetic recording head and the rotating disc represented by the signal provided by the piezoelectric sensor is monitored during operation of the disc drive system. A predicted head crash is indicated when the level of interference between the magnetic recording head and the rotating disc is different from the nominal level of interference by more than the threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.