Magnetic recording medium having a carbon protective film contai

Details Magnetic recording medium having a carbon protective film contai Magnetic recording medium having a carbon protective film contai

1995-10-23

1998-07-07

Resan, Steven A.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428336, 428408, 428694T, 428694TP, 428694TC, 428694TF, 428695, 428900, G11B 0566

Patent

active

057766029

ABSTRACT:
A magnetic recording medium of the present invention includes: a non-magnetic substrate; a ferromagnetic thin metal layer formed on the non-magnetic substrate; and a carbon layer and a lubricant layer in contact with the carbon layer, which is formed above the ferromagnetic thin metal layer so that the lubricant layer is an outermost layer, wherein the carbon layer contains nitrogen atoms, a Raman spectrum of the carbon layer has a peak A in the range of about 1310 to about 1410 cm.sup.-1 and a peak B in the range of about 1520 to about 1570 cm.sup.-1, and a ratio of integrated intensities of the peak A to the peak B is in the range of about 1.2 to about 2.0.

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patent: 5637393 (1997-06-01), Ueda et al.

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