Method and apparatus for ultrasonically texturing ABS of magnetic head of hard disk drive
US5967880A · kind A · utility
9Cited by
9References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 3, 1997 |
| Grant date | Oct 19, 1999 |
| Priority date | — |
| Expiry date | Jan 3, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/102
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for texturing the air bearing surface (ABS) of a magnetic head of a hard disk drive includes juxtaposing the ABS with an ultrasonically-driven sonitrode having a diamond die end. An alumina slurry is disposed between the sonitrode and ABS at a slight pressure, with the slurry having a grit size of less than one micron. The sonitrode is then vibrated to agitate the slurry and thereby texture the head. If desired, a cavity can be formed in the die, with the cavity being a mirror image of a portion of the head, e.g., the sensing element, that is not intended to be textured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.