Dynamic magnetic information storage or retrieval – Fluid bearing head support – Disk record
Reexamination Certificate
2005-10-18
2005-10-18
Castro, Angel (Department: 2653)
Dynamic magnetic information storage or retrieval
Fluid bearing head support
Disk record
Reexamination Certificate
active
06956718
ABSTRACT:
A slider is formed of an air bearing surface coated with a wear limiting coating that substantially limits surface wear of the air bearing surface encountered in proximity recording. The wear limiting coating is comprised of a wear inhibiting layer formed on the air bearing surface and a sacrificial layer formed on the wear inhibiting layer. The two coatings of the wear limiting coating have different mechanical properties so that the sacrificial layer is burnished, exposing the wear inhibiting layer. This design substantially limits the surface wear of the air bearing surface typically encountered in proximity recording, resulting in less debris accumulation, which could otherwise adversely affect the performance of the proximity recording head. This self-limiting burnishing action overcomes the flying height variation due to manufacturing tolerances and provides extremely small and uniform magnetic spacing, which greatly enhances the proximity recording. Moreover, the burnishing action also achieves an improved flying stability and a reduction in the altitude sensitivity.
REFERENCES:
patent: 5175658 (1992-12-01), Chang et al.
patent: 5271802 (1993-12-01), Chang et al.
patent: 5674638 (1997-10-01), Grill et al.
patent: 5943187 (1999-08-01), Chen et al.
patent: 6246538 (2001-06-01), Kasamatsu et al.
patent: 6351345 (2002-02-01), Kameyama
patent: 6396664 (2002-05-01), Koishi et al.
patent: 6424494 (2002-07-01), Koishi
patent: 6424495 (2002-07-01), Kobayashi et al.
patent: 6433965 (2002-08-01), Gopinathan et al.
patent: 6624977 (2003-09-01), Boutaghou
patent: 6728069 (2004-04-01), Otsuka et al.
Kulkarni Ashok Venkatesh
Levi Pablo Gabriel
Prabhakaran Vijay
Sladek Eric Thomas
Sullivan Michael Thomas
Castro Angel
Harrison, Esq. Joshua C.
Kassatly, Esq. Samuel A.
Western Digital (Fremont) Inc.
LandOfFree
Sandwich diamond-like carbon overcoat for use in slider... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Sandwich diamond-like carbon overcoat for use in slider..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sandwich diamond-like carbon overcoat for use in slider... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3470242