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VARIABLE CARBON OVERCOATS FOR IMPROVED SLIDER FLYING PERFORMANCE

IP.com Disclosure Number: IPCOM000013304D
Original Publication Date: 1999-Sep-01
Included in the Prior Art Database: 2003-Jun-18

Publishing Venue

IBM

Related People

Authors:
Gopalakrishna, S

Abstract

Today's sliders have a uniform (70 125 angstroms) carbon overcoat. The pressure distribution in the slider-disk gap can be strongly altered by varying this carbon thickness selectively. One embodiment is to have a gradually sloped carbon deposition depth that decreases in thickness from leading edge to trailing edge. This can result in a redistribution of airbearing load from, for example, the rear of the center rail to the rear of the side rails, thereby offering additional flexibility in air bearing design. Possible applications include a DC shift downward in flying height, better flying profile control, altitude performance, and improved roll stiffness. 1