Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1994-06-28
1997-04-08
Kiliman, Leszek
Stock material or miscellaneous articles
Composite
Of inorganic material
428336, 428408, 428694TP, 428694TC, 428694TZ, 428694TF, 428694TR, 428694TS, 428900, 427127, 427128, 427129, 427130, 427131, 427132, 369272, 369283, 360128, 360 81, G11B 566, B05D 512, C23C 1400
Patent
active
056186398
ABSTRACT:
A magnetic recording medium used in a magnetic recording apparatus has a non-magnetic substrate, a magnetic film formed on the substrate, an optional protective film formed on the magnetic film and a lubricating layer formed on the top surface of the medium. The lubricating layer is made of an organic polymer lubricant having molecules with an interstitial radius of not more that 0.31 nm. The interstitial radius is affected by coating the lubricant on the protective film after the protective film has been cleaned with a surface treatment, such as an oxygen plasma treatment or an ozone treatment. By maintaining the interstitial radius between molecules of the lubricant layer equal to or less than 0.31 nm, water and corrosive molecules in water cannot penetrate the lubricating layer and corrode the magnetic film. Also, the lubricant layer provides good sliding durability with a resultant long CSS life.
REFERENCES:
"The Symposium on Memory and Advanced Recording Technologies (S.M.A.R.T.)" WS3-B-2, San Jose, CA, May 1986, pp. 1-25.
Journal of Colloid and Interface Science, V. 22, 1966, pp. 165-171.
Ohno Tomoyuki
Ootani Yuichi
Osaki Akira
Shiroishi Yoshihiro
Yahisa Yotsuo
Hitachi , Ltd.
Kiliman Leszek
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