Advanced glidehead sensor for small slider
US6557399B1 · kind B1 · utility
4Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2001 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | Nov 16, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B33/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk surface asperities tester including a glidehead member having a piezoelectric sensor fabricated directly on the glidehead member. The piezoelectric sensors are useful in applications utilizing 70%, 50%, 30%, or smaller glideheads. The invention discloses a method for manufacturing sensors utilizing microchip fabrication techniques to form the piezoelectric sensors directly on glidehead surfaces, including standard Al2O3.TiC glideheads. The fabricated piezoelectric sensors are used in combination with signal processors to detect and analyze asperities in a disk drive surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.