Tribological behavior of amorphous carbon nitride overcoats for magnetic thin-film rigid disks

Eric C. Cutiongco*, Dong Li, Yip Wah Chung, C. Singh Bhatia

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

4 Scopus citations


Amorphous carbon nitride coatings of thickness of 5 and 30 nm were deposited onto 65 and 95 mm magnetic thin-film rigid disks surfaces using single-cathode and dual-cathode magnetron sputtering systems containing nitrogen-argon plasmas. Under optimum deposition conditions, amorphous carbon nitride coatings can be synthesized on ultrasmooth thin-film disks with no significant pinholes at thickness down to 5 nm, with hardness 22-28 GPa (compared to 7-12 GPa for amorphous carbon), and r.m.s. roughness as low as 0.25 nm. These amorphous carbon nitride coatings were shown to have better contact-start-stop performance and three-to-four times under identical testing conditions. Amorphous carbon nitride appears to be a promising candidate overcoat material for replacing amorphous carbon in the next-generation magnetic thin-film rigid disk systems.

Original languageEnglish (US)
Pages (from-to)6
Number of pages6
JournalAmerican Society of Mechanical Engineers (Paper)
StatePublished - 1995
EventProceedings of the 1995 Jt. ASME/STLE Tribology Conference - Orlando, FL, USA
Duration: Oct 8 1995Oct 11 1995

ASJC Scopus subject areas

  • Mechanical Engineering


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