Method for controlling overcoat recession in a magnetic thin film head
US7455332B2 · kind B2 · utility
4Cited by
15References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 16, 2005 |
| Grant date | Nov 25, 2008 |
| Priority date | — |
| Expiry date | Nov 24, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1116
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The overcoat of a slider (alumina) is recessed relative to the slider ABS by a non-abrasive CMP process sufficiently to prevent thermal protrusion of the overcoat during subsequent slider use in a hard disk drive. The CMP process involves the oscillatory and rotational compressional contact between the ABS surface of the slider and a polymerically pre-treated compliant pad that is sprayed by an aqueous alkali lubricating solution having a pH between about 9 and 10. The overcoat is thereby also softened by the lubricating solution and removed by the compressional contact and no use of abrasives is required.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.