Magnetic recording medium and its manufacturing process

Details Magnetic recording medium and its manufacturing process Magnetic recording medium and its manufacturing process

1991-06-11

1995-01-03

Thibodeau, Paul J.

Stock material or miscellaneous articles

Composite

Of inorganic material

428692, 428694TP, 428695, 428900, G11B 566

Patent

active

053785487

ABSTRACT:
A magnetic recording medium, comprising; a 2-layer film formed on a glass disk substrate as an under layer composed of an amorphous oxide or NaCl oxides like a NiO or CoO and the like, or any soft magnetic oxide of Mn-Zn ferrite, Ni-Zn ferrite and the like, or a combination of those 2 materials; a magnetic recording medium formed thereon composed of a Co ferrite perpendicular magnetic film of a columnar structure; and a structure formed thereon with a lubricant layer medium. This magnetic recording medium is used for a magnetic rigid disk apparatus. The substrate is made by press-molding the glass plate at a high temperature. The under layer film and Co ferrite film are composed of vapors of organic material compounds and oxygen as their raw materials, and made by a plasma assisted CVD method.

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Fujii et al., IEEE Translation Journal on Magnetics in Japan vol. 4, No. 8, Aug. 1989.

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