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Confinement Effects of Hard Disk Lubricant Investigation by Atomic Force Microscopy

Published online by Cambridge University Press:  01 February 2011

George L Caia ,
Cynthia Buenviaje-Coggins ,
Nicole Munoz ,
David Faddis ,
Doru I Florescu ,
Sung Park  and
SungChang Lee
George L Caia
Affiliation:
[email protected], Park Systems, Advanced Technology, 3040 Olcott St., Santa Clara, CA, 95054, United States, 4089861110, 4089861199
Cynthia Buenviaje-Coggins
Affiliation:
[email protected], Park Systems, Advanced Technology, 3040 Olcott St., Santa Clara, CA, 95054, United States
Nicole Munoz
Affiliation:
[email protected], Park Systems, Advanced Technology, 3040 Olcott St., Santa Clara, CA, 95054, United States
David Faddis
Affiliation:
[email protected], Park Systems, Advanced Technology, 3040 Olcott St., Santa Clara, CA, 95054, United States
Doru I Florescu
Affiliation:
[email protected], Park Systems, Advanced Technology, 3040 Olcott St., Santa Clara, CA, 95054, United States
Sung Park
Affiliation:
[email protected], Park Systems, Advanced Technology, 3040 Olcott St., Santa Clara, CA, 95054, United States
SungChang Lee
Affiliation:
[email protected], Samsung, Samsung Information Systems America, 75 West Plumeria Dr., San Jose, CA, 95125, United States
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Abstract

As the critical design requirements decrease, we need to understand how confinement affects the performance of the materials we use. One example of this occurs with the lubricant used on magnetic recording disks to reduce wear between the disk and head reader during unexpected intermittent contact. Lubricants for use in hard drives need to have sufficient reflow and redistribution properties which are stable in a wide range of temperatures experienced in today's hard drive. Since the material properties of the confined system often differ from the bulk properties, the tools needed to properly investigate these systems need to be developed and understood. In this study, we utilized atomic force microscopy (AFM) techniques, to study the confinement effects on lubricant stability with temperature. Our studies have demonstrated distinct changes in adhesion force with changes in the thickness of the confining substrate layer. As adhesion is a component of friction, these changes in adhesion are directly related to lubricant performance and its ability to reduce wear between disk and reader.

Keywords

adhesionlubricantscanning probe microscopy (SPM)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1025: Symposium B – Nanoscale Phenomena in Functional Materials by Scanning Probe Microscopy , 2007 , 1025-B08-10
Copyright
Copyright © Materials Research Society 2008

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