Head with a transducer overcoat having a trailing air flow dam that is shallowly recessed from an air bearing surface
US7872833B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2007 |
| Grant date | Jan 18, 2011 |
| Priority date | — |
| Expiry date | Aug 8, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/6082
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A head includes a transducer and a slider having an air bearing surface (ABS) and a trailing face. The slider has an overcoat layer that includes the trailing face and that overcoats the transducer. The ABS includes a trailing pad having a major surface adjacent the transducer, with the major surface lying in a primary plane. The ABS also includes a sub-ambient pressure cavity disposed upstream of the overcoat layer and being recessed from the primary plane by a cavity depth in the range 0.8 to 2 microns. The overcoat layer includes a trailing air flow dam being recessed from the primary plane by a step depth in the range 0.05 to 0.5 microns. The overcoat layer also includes a corner region recessed from the primary plane by at least the cavity depth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.