Head with a transducer overcoat having a trailing air flow...

Details Head with a transducer overcoat having a trailing air flow... Head with a transducer overcoat having a trailing air flow...

2011-01-18

2011-01-18

Blouin, Mark (Department: 2627)

Dynamic magnetic information storage or retrieval

Fluid bearing head support

Disk record

Reexamination Certificate

active

07872833

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.

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