Hydrogenated amorphous carbon (a-C:H) overcoat for thin-film magnetic rigid-disk application

Mehmandoust, Y.; Tsai, Hsiao‐chu; Samani, H.; Eltoukhy, A.

doi:10.1109/intmag.1990.734888

Cited by 1 publication

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“…The durability test indicates that nitrogen carbon films sputtered in argon and nitrogen gas exhibit a significant effective increase in the number of revolutions to failure, reduce the friction and show better wear resistance than that of carbon films deposited in pure argon gas. The reason for this improvement is that the introduction of nitrogen during the sputtering enriches the diamondlike sp 3 bonding in the carbon films as verified by the XPS measurements (8]. Since diamond is a strong and hard cubic tetrahedral structure, the bonding in the carbon lattice is such that each carbon atom has four valence electrons to form covalent bonds with neighbor atoms.…”

Section: Durability Study Of C:n Thin Film Overcoatsmentioning

confidence: 96%

“…A protective overcoat has been used between the recording head and magnetic layer to improve wear durability. Due to superior mechanical properties and corrosion resistance, amorphous diamondlike hydrocarbon (a-C:H) films have recently been used as a protective overcoat on magnetic storage disks [1][2] [3]. Carbon films which exhibit diamond-like sp3 bondin~ have also been produced by RF diode sputtering 10 a mixture gas of nitrogen and argon.…”

Section: Introductionmentioning

confidence: 99%

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Durability and Stress Analysis of the Rf Sputtered C:n Overcoat for Rigid Disks of Magnetic Thin Film Media

et al. 1991

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Abstracts---Thin carbon overcoats were deposited on rigid disks of magnetic thin film media by RF diode sputtering using a mixture of argon and nitrogen gas. Constant drag test of thin film head sliders were performed by a computer-controlled friction-wear tester. As the nitrogen partial pressure was increased from o mTorr to 7.5 mTorr, the number of revolutions before wear failure increased from 3000 to 9000 revolution, the catastrophic wear was also found on carbon overcoats deposited on pure argon. The stress distribution on multilayer were also analyzed by Finite Element Method.

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Section: Durability Study Of C:n Thin Film Overcoatsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%