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Micro-Wear Scan Test on the Carbon Overcoats as Thin as 6 NM or Less

  • T. W. Wu (a1), Thomas W. Scharf (a2), Hong Zhang (a3) and John A. Barnard (a2)

Abstract

Nitrogen-doped carbon (CNX) overcoats, ranging from 1 to 6nm in thickness, were deposited on magnetic recording disks by a DC-sputtering process. A critical load, based on the first occurrence of coating damage, was used as a semi-quantitative measure of the mechanical strength of these overcoats. It was found that the critical load decreased in a nearly linear manner with the CNX thickness from 6nm down to ∼2nm regime. However, the 1nm thick CNX coating deviated from this trend with a significant decrease in critical load. High-resolution SEM was employed to find the critical loads as well as to reveal the details of the coating wear morphology and the CNX failure mechanism.

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Micro-Wear Scan Test on the Carbon Overcoats as Thin as 6 NM or Less

  • T. W. Wu (a1), Thomas W. Scharf (a2), Hong Zhang (a3) and John A. Barnard (a2)

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