Browse Prior Art Database

Improved Overcoats for Thin Film Magnetic Recording Media

IP.com Disclosure Number: IPCOM000103830D
Original Publication Date: 1993-Feb-01
Included in the Prior Art Database: 2005-Mar-18
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Kao, A: AUTHOR [+2]

Abstract

The inventions disclosed are thin film magnetic recording media with sputtered tin oxide overcoats which provide high wear resistance and low stiction.

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Improved Overcoats for Thin Film Magnetic Recording Media

      The inventions disclosed are thin film magnetic recording media
with sputtered tin oxide overcoats which provide high wear resistance
and low stiction.

      Thin film magnetic recording media require overcoats to protect
their mechanical durability for sliding, flying, and accessing.  In
addition, such coatings protect against corrosion.  Carbon is
commonly used as such a protective overcoat.  Coatings of zirconium
oxide and yttrium oxide have also performed well.

      Inventor Novotny demonstrated that tin oxide, silicon
oxynitride, and phosphorous oxynitride coatings prepared by enhanced
plasma chemical vapor deposition each have excellent tribological
performance and corrosion resistance.

      The invention is an extension of this previous work and
proposes thin film magnetic recording media with a sputtered overcoat
of tin oxide.  Such coatings, both lubricated and unlubricated, have
displayed tribological performance which exceeds the performance of
zirconium oxide overcoats.