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Method for Controlling Flyheight of Relative Motion Air Bearing

IP.com Disclosure Number: IPCOM000062263D
Original Publication Date: 1986-Oct-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Apuzzo, NC: AUTHOR

Abstract

Increased static and dynamic control of the distance between a magnetic recording head and the recording media can be obtained by bonding a layer of piezo-electric material to the head/slider so as to induce axial bending. Diminished sticking properties on lift-off of the head/slider will also be realized from the incorporation of said piezo-electric material.

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Method for Controlling Flyheight of Relative Motion Air Bearing

Increased static and dynamic control of the distance between a magnetic recording head and the recording media can be obtained by bonding a layer of piezo-electric material to the head/slider so as to induce axial bending. Diminished sticking properties on lift-off of the head/slider will also be realized from the incorporation of said piezo-electric material.

In current high density magnetic recording systems, the recording head resides on a relative motion air bearing, referred to as a slider. The slider is designed to fly over a spinning magnetic media disk at a certain flyheight and with certain stiffness and damping characteristics. With the bonding of a layer of a piezo-electric material to the opposite to disk side of said slider, the slider can be induced to bend about the axis parallel to the rails. Activation of the piezo- electric material causes the slider to fly lower due to the induced non-parallelism of the slider rails.

This induced bending effect can be used to statically control the flyheight in an open loop system. For example, when not reading or writing, the slider can be flown at higher than normal flyheights to avoid potential crashes. However, on demand, the piezo-electric material can be energized which would cause the flyheight to decrease for reading and/or writing data on the media. A closed loop servo system could also be used wherein the flyheight would be adjusted by ac...