Tape recording head with trench defining wear zone for...

Details Tape recording head with trench defining wear zone for... Tape recording head with trench defining wear zone for...

2005-03-31

2009-08-04

Renner, Craig A (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Head surface structure

C360S129000, C360S130210

Reexamination Certificate

active

07570457

ABSTRACT:
A magnetic recording head is provided comprising a flat contour head having a deposited closure. An ion-milled trench or recess is provided near the substrate edge to create a lip or wear zone between the trench edge and the substrate/gap interface. As the tape passes over the head, the lip begins to wear and acquires a bevel. After up to a few hundred hours of runtime, the bevel spans the entire length of the lip after which the bevel length remains constant resulting in a constant rate of head wear. The width of the lip or wear zone is chosen such that head wear chases gap and transducer wear resulting in reduced recession of the transducer from the recording tape.

REFERENCES:
patent: 4853814 (1989-08-01), McClure
patent: 5345353 (1994-09-01), Krantz et al.
patent: 5623383 (1997-04-01), Gregory et al.
patent: 5710683 (1998-01-01), Sundaram
patent: 5905613 (1999-05-01), Biskeborn et al.
patent: 6122147 (2000-09-01), Fahimi et al.
patent: 6690542 (2004-02-01), Wang
patent: 2003/0090833 (2003-05-01), Tani et al.

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