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High-Pitch-Angle Slider Design Utilizing Top Surface Air Flow

IP.com Disclosure Number: IPCOM000034742D
Original Publication Date: 1989-Apr-01
Included in the Prior Art Database: 2005-Jan-27
Document File: 2 page(s) / 51K

Publishing Venue

IBM

Related People

Best, GL: AUTHOR [+3]

Abstract

In rigid disk magnetic recording a hydrodynamic air bearing is used to suspend the magnetic head above the disk medium. It is generally known in the art that the flying characteristics of a slider can be altered by variations in the geometry of its air bearing surface. An alternative method for varying the slider's flying characteristics is to alter the design of the slider body to utilize macroscopic air flow. Changing the air flow around the slider can lead to a redistribution of forces, causing the slider to fly differently. A specific embodiment of this slider is shown in Fig. 1. The top surface of the slider has been modified by the addition of a block at the trailing end (TE) of the slider which protrudes into the air flow. The air forces on the block alter the slider's flying characteristics. In Fig.

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High-Pitch-Angle Slider Design Utilizing Top Surface Air Flow

In rigid disk magnetic recording a hydrodynamic air bearing is used to suspend the magnetic head above the disk medium. It is generally known in the art that the flying characteristics of a slider can be altered by variations in the geometry of its air bearing surface. An alternative method for varying the slider's flying characteristics is to alter the design of the slider body to utilize macroscopic air flow. Changing the air flow around the slider can lead to a redistribution of forces, causing the slider to fly differently. A specific embodiment of this slider is shown in Fig. 1. The top surface of the slider has been modified by the addition of a block at the trailing end (TE) of the slider which protrudes into the air flow. The air forces on the block alter the slider's flying characteristics. In Fig. 2, we show a measurement of the pitch angle of a slider with the block attached as a function of disk linear velocity. For comparison, we superimpose in this figure the measurement for this slider prior to the block attachment. From these data we observe a significant increase especially at the higher velocities. Even larger effects may be realized through an optimized design.

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In summary, we describe here a slider design which utilizes air flow over its top surface to alter its flying characteristics. This effect is independent of the design of the air bearing surface at the slider-t...