US 6,982,071 B2
Thin-film magnetic recording media with dual intermediate layer structure for increased coercivity
Xiaoding Ma, Redwood City, Calif. (US); Kevin J. Grannen, Fremont, Calif. (US); Jing Gui, Fremont, Calif. (US); Jeffrey A. McCann, Tracy, Calif. (US); and Mark A. Shows, Fremont, Calif. (US)
Assigned to Seagate Technology LLC, Scotts Valley, Calif. (US)
Filed on Jan. 14, 2004, as Appl. No. 10/756,466.
Application 10/756466 is a division of application No. 09/982937, filed on Oct. 22, 2001, granted, now 6,689,425.
Application 09/982937 is a division of application No. 09/400187, filed on Sep. 21, 1999, granted, now 6,312,798.
Claims priority of provisional application 60/101843, filed on Sep. 25, 1998.
Prior Publication US 2004/0146685 A1, Jul. 29, 2004
Int. Cl. C01B 31/06 (2006.01); C23C 14/48 (2006.01); C23C 14/24 (2006.01); H05H 1/46 (2006.01)
U.S. Cl. 423—445R 2 Claims
 
1. An abrasion-resistant material useful as a protective overcoat layer for a magnetic recording medium, which material comprises ion beam-deposited, nitrogen-doped, hydrogenated carbon (IBD i-C:HN),
wherein the hardness of the IBD i-C:HN layer being about 15–20 GPa, the density being about 1.5–2.5 g/cm3, the electrical resistivity being less than about 1011 ohm-cm, and the EBG being about 1.4–1.6 eV.