Browse Prior Art Database

Magnetic Head Fly Height Regulator

IP.com Disclosure Number: IPCOM000044285D
Original Publication Date: 1984-Dec-01
Included in the Prior Art Database: 2005-Feb-05
Document File: 2 page(s) / 21K

Publishing Venue

IBM

Related People

Jones, DW: AUTHOR [+3]

Abstract

This article describes a fly height regulator utilizing a bimetallic element providing normal force to head suspension which effects the preloading and regulates gram load as an additional file adjustment. There is always a need to vary the fly height of a head without altering other parameters in files, production testers, diagnostic testers, and in the laboratory. The magnetic head fly height regulator 1 includes a regulator beam 2 with predetermined flexural capability which presses against a head suspension assembly 3 supported on a file arm 4, thereby applying a normal force to the suspension and altering the preload.

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Magnetic Head Fly Height Regulator

This article describes a fly height regulator utilizing a bimetallic element providing normal force to head suspension which effects the preloading and regulates gram load as an additional file adjustment. There is always a need to vary the fly height of a head without altering other parameters in files, production testers, diagnostic testers, and in the laboratory. The magnetic head fly height regulator 1 includes a regulator beam 2 with predetermined flexural capability which presses against a head suspension assembly 3 supported on a file arm 4, thereby applying a normal force to the suspension and altering the preload. The regulator beam 2 includes a heater element 5, such as a bimetallic heater arm, which exerts a force to push the suspension assembly, thus varying the fly height and changing the preload when connected and energized by an electric current. The heater would cause the head to fly high until the disk is up to speed and then fly low during operation when the heater element 5 is energized. In a production disk file, a dual mode would be provided for fly operation for a fast take-off high flying mode and a low flying mode for high resolution read-write. Fast take-off would enhance disk start-stop life and reduce the need for lubrication. In the low flying mode, resolution during read-write would be improved, providing higher area density. The low flying height would also result in increased preload stabilization...