Patent ID: 6689425
Filing Date: 2004-02-10
Classification: G11B,Y10T

Abstract:
A method of forming an abrasion-resistant protective overcoat layer which method comprises the steps of:(a) supplying an ion beam generator with a hydrocarbon gas of formula CxHy, where x=1-4 and y=2-10, and nitrogen (N2) gas to generate an ion beam comprising C, H, and N-containing ions; and (b) directing said ion beam onto the surface of a substrate to deposit a layer of ion beam-deposited, nitrogen-doped, hydrogenated carbon (IBD i-C:HN) thereon, 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 1.45-1.6 eV.