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Ultrathin ion-beam carbon as an overcoat for the magnetic recording medium

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3 Author(s)
Yongjian Sun ; KOMAG Inc., San Jose, CA, USA ; Xing Chu ; Yang, Ming M.

A diamond-like carbon film of 20 Å deposited by the ion-beam method demonstrated good wear and corrosion protection on a magnetic medium. No wear or high stiction was observed after the contact-start-stop (CSS) test terminated at 20000 cycles. The corrosion tests on the medium indicated that an ion-beam carbon overcoat, as thin as 20 Å, provides better corrosion protection than a 50 Å sputtered carbon overcoat. The carbon deposition ion energy influenced the overall magnetic performance of the recording medium. Magnetic defects and media noise increased with increasing carbon deposition ion energy.

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Magnetics, IEEE Transactions on  (Volume:39 ,  Issue: 1 )