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Title: Ultra-thin overcoats for the head/disk interface tribology

Abstract

Areal density in magnetic storage is increasing at a blistering pace of 60% annually. Recently IBM announced its mobile product with the industry highest areal density of 2.64 Gb/In{sup 2}. The areal density demonstrations have shown up to 5 Gb/In{sup 2} possible. Reaching higher areal density targets dictate that magnetic spacing between heads and disks be reduced. For the example of a 10 Gb/In{sup 2} areal density goal, the magnetic spacing should be {approx}25 nm. In budgeting this magnetic spacing, it is required that disk and slider air bearing surface overcoats thickness be reduced to 5 nm range. Present choice of carbon overcoat in the magnetic storage hard disk drive industry is sputter deposited, hydrogenated carbon (CH{sub x}) with thickness in the range of 12-15 nm on heads and disks. Novel overcoats such as nitrogenated carbon (CN{sub x}) and cathodic arc carbon films are being developed for future applications. Cathodic arc deposition forms ultra-thin amorphous hard carbon films of high sp{sup 3} content, high hardness, and low coefficient of friction. These properties make it of great interest for head/disk interface application, in particular for contact recording. In many cases, the tribological properties of the head disk interface could be improvedmore » by factors up to ten applying cathodic arc overcoats to the slider or disk surface. This paper reviews the results of cathodic arc ultra-thin (2-10 nm) carbon overcoats for head/disk interface tribological applications.« less

Authors:
 [1]; ;  [2]
  1. SSD/IBM, San Jose, CA (US)
  2. Lawrence Berkeley National Lab., CA (US) [and others
Publication Date:
Research Org.:
Lawrence Berkeley Lab., CA (US); Advanced Light Source ALS (US)
Sponsoring Org.:
Defense Advanced Research Projects Agency, Arlington, VA (US); USDOE Office of Energy Research, Washington, DC (US)
OSTI Identifier:
539884
Report Number(s):
LBNL-40416; LSBL-385; CONF-970798-; LBNL/ALS-774
ON: DE97008864; CNN: Grant MDA972-93-1-0009; TRN: US200210%%24
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Conference
Resource Relation:
Conference: International conference on micromechatronics for information and precision equipment, Tokyo (JP), 07/20/1997--07/23/1997; Other Information: Supercedes report DE97008864; PBD: May 1997; PBD: 1 May 1997
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 36 MATERIALS SCIENCE; AIR; BEARINGS; CARBON; DEPOSITION; FRICTION; HARDNESS; STORAGE; TARGETS; THICKNESS; TRIBOLOGY; ADVANCED LIGHT SOURCE ALS

Citation Formats

Bhatia, C.S., Anders, S., and Brown, I.G. Ultra-thin overcoats for the head/disk interface tribology. United States: N. p., 1997. Web.
Bhatia, C.S., Anders, S., & Brown, I.G. Ultra-thin overcoats for the head/disk interface tribology. United States.
Bhatia, C.S., Anders, S., and Brown, I.G. Thu . "Ultra-thin overcoats for the head/disk interface tribology". United States. https://www.osti.gov/servlets/purl/539884.
@article{osti_539884,
title = {Ultra-thin overcoats for the head/disk interface tribology},
author = {Bhatia, C.S. and Anders, S. and Brown, I.G.},
abstractNote = {Areal density in magnetic storage is increasing at a blistering pace of 60% annually. Recently IBM announced its mobile product with the industry highest areal density of 2.64 Gb/In{sup 2}. The areal density demonstrations have shown up to 5 Gb/In{sup 2} possible. Reaching higher areal density targets dictate that magnetic spacing between heads and disks be reduced. For the example of a 10 Gb/In{sup 2} areal density goal, the magnetic spacing should be {approx}25 nm. In budgeting this magnetic spacing, it is required that disk and slider air bearing surface overcoats thickness be reduced to 5 nm range. Present choice of carbon overcoat in the magnetic storage hard disk drive industry is sputter deposited, hydrogenated carbon (CH{sub x}) with thickness in the range of 12-15 nm on heads and disks. Novel overcoats such as nitrogenated carbon (CN{sub x}) and cathodic arc carbon films are being developed for future applications. Cathodic arc deposition forms ultra-thin amorphous hard carbon films of high sp{sup 3} content, high hardness, and low coefficient of friction. These properties make it of great interest for head/disk interface application, in particular for contact recording. In many cases, the tribological properties of the head disk interface could be improved by factors up to ten applying cathodic arc overcoats to the slider or disk surface. This paper reviews the results of cathodic arc ultra-thin (2-10 nm) carbon overcoats for head/disk interface tribological applications.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {5}
}

Conference:
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