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Roughening of Air Bearing Surface by Ion Bombardment

IP.com Disclosure Number: IPCOM000115902D
Original Publication Date: 1995-Jul-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 25K

Publishing Venue

IBM

Related People

Kaufman, JH: AUTHOR [+2]

Abstract

Higher storage density with acceptable soft error rates requires a smoother disk. Maintaining acceptable mechanical properties (low friction) at the head disk interface requires texturing the disk or the slider or both. Texturing the disk is known to increase the Soft Error Rate (SER) at high storage densities. To decrease the SER, some of the roughness must be introduced at the Air Bearing Surface (ABS) to permit manufacture of a smoother disk. It has been shown that ion bombardment by argon ion beam, carbon sputtering in Argon, and PECVD deposition of carbon all lead to a roughening of the N58 ABS.

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Roughening of Air Bearing Surface by Ion Bombardment

      Higher storage density with acceptable soft error rates
requires a smoother disk.  Maintaining acceptable mechanical
properties (low friction) at the head disk interface requires
texturing the disk or the slider or both.  Texturing the disk is
known to increase the Soft Error Rate (SER) at high storage
densities.  To decrease the SER, some of the roughness must be
introduced at the Air Bearing Surface (ABS) to permit manufacture of
a smoother disk.  It has been shown that ion bombardment by argon ion
beam, carbon sputtering in Argon, and PECVD deposition of carbon all
lead to a roughening of the N58 ABS.

      Carbon is now used on sliders as a protective coating.  Because
the N58 slider can be roughened during the carbon deposition process,
through ion bombardment by biased sputtering or CVD, texturing the
slider requires no additional steps.