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US 6,136,403 AGranted
Buffered nitrogenated carbon overcoat for data recording disks and method for manufacturing the same
AssigneeWestern Digital Corporation
InventorsChanapatna Krishnamorthy Prabhakara, Amrik Singh Lehil, Stella Zofia Gornicki, Keith Samuel Goodson, Wing Tsang Tang
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Abstract
A recording medium on a hard disk is provided that includes a magnetic data recording layer on the disk, a hydrogenated carbon buffer layer over the data recording layer, and a nitrogenated carbon overcoat layer over the hydrogenated carbon buffer layer. The composition ratios and thickness of the recording and nitrogenated carbon overcoat layers are suitably controlled to optimum ranges.
Claims9
A magnetic disk for a hard disk drive, the magnetic disk comprising:
- a substrate;
- an underlayer deposited above the substrate;
- a magnetic layer deposited above the underlayer;
- a hydrogenated carbon buffer layer deposited above the magnetic layer, the buffer layer containing carbon and hydrogen and having a thickness between 1 to 7 nanometers;
- and
- a nitrogenated carbon layer deposited directly above the buffer layer, the nitrogenated carbon layer containing carbon and nitrogen.
3 more elements
Dependencies are inferred from the claim text.