Browse Prior Art Database

Low Flying Interface (Head) Feature

IP.com Disclosure Number: IPCOM000015078D
Original Publication Date: 2002-Sep-30
Included in the Prior Art Database: 2003-Jun-20
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Abstract

Described is a feature on a HDD head that allows the head to fly with reduced clearance. Stability of the head is enhanced with these additional features. Specifically, a feature interposed between the slider ABS and the disk surface. This feature is there to minimize the close contact area between the disk and the head and thus reduce the drag or interactive forces. This controlled area is needed in order to achieve reliability in systems with increased levels of head disk near contacts that are expected at low flying heights. The features can be on the ABS, in the etched area, outside of the conventional slider surface, or any combination of them all together.

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Low Flying Interface (Head) Feature

Described is a feature on a HDD head that allows the head to fly with reduced clearance. Stability of the head is enhanced with these additional features. Specifically, a feature interposed between the slider ABS and the disk surface. This feature is there to minimize the close contact area between the disk and the head and thus reduce the drag or interactive forces. This controlled area is needed in order to achieve reliability in systems with increased levels of head disk near contacts that are expected at low flying heights. The features can be on the ABS, in the etched area, outside of the conventional slider surface, or any combination of them all together.

Component level testing has demonstrated an improved life for heads processed with features that minimize the contact area between the head and the disk. Additional component tests have shown the hysteresis of the head going into and out of contact with the disk is an additional benefits of these features or pads. The sliders with pads recover to a condition of stable flying much sooner than the sliders without.

In summary, head pads or texture can be used to reduce the near contact area and thus the friction or interaction level. These features are vitally important to achieve enhanced levels of reliability at very low flying heights.

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