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

Author

Sun, Yongjian ; Chu, Xing ; Yang, Ming M.

Author_Institution

KOMAG Inc., San Jose, CA, USA

Volume

39

Issue

1

fYear

2003

fDate

1/1/2003 12:00:00 AM

Firstpage

594

Lastpage

598

Abstract

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.

Keywords

corrosion protective coatings; corrosion testing; diamond-like carbon; hard discs; ion beam assisted deposition; magnetic recording; magnetic recording noise; stiction; wear resistant coatings; wear testing; 20 A; C; CoCrTaPt; CoCrTaPt alloy magnetic layer; contact-start-stop test; corrosion protection; corrosion tests; deposition ion energy; diamond-like carbon ultrathin film; head-disk interaction; ion-beam method; magnetic defects; magnetic recording medium overcoat; media noise; overall magnetic performance; stiction; wear protection; Amorphous magnetic materials; Anodes; Corrosion; Hydrocarbons; Magnetic films; Magnetic recording; Protection; Sputtering; Sun; Testing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.806348

Filename

1179927