Patent ID: 8425975

Claim:
A magnetic disk manufacturing method of manufacturing the magnetic disk, said magnetic disc comprising: a magnetic layer for magnetic recording, a protective layer formed over said magnetic layer for protecting said magnetic layer, and a lubricating layer formed over said protective layer, wherein said protective layer is a layer composed substantially of carbon, hydrogen, and nitrogen and an atomic ratio (N/C) of nitrogen and carbon calculated from intensities of N1s and C1s spectra detected at a photoelectron detection angle of 7° by angularly resolved X-ray photoelectron spectroscopy is 0.15 or more and 0.25 or less, wherein said protective layer comprises a hydrogenated carbon protective film composed substantially of carbon and hydrogen and formed over said magnetic layer, and a surface layer portion containing carbon and nitrogen and formed at a surface portion in contact with said lubricating layer, said magnetic disk manufacturing method comprising: forming said hydrogenated carbon protective film in an atmosphere with a vacuum degree of 0.1 Pa or more and less than 2 Pa by a plasma CVD method, and forming said surface layer portion in an atmosphere with a vacuum degree of more than 2 Pa and 6 Pa or less by the plasma CVD method.