Magnetic recording medium, process for producing the same, and magnetic recording and reproducing apparatus
AssigneeShowa Denko K.K.
InventorsMasato Fukushima, Ryuji Sakaguchi, Yukihisa Matsumura
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Abstract
A magnetic recording medium exhibiting excellent read-write conversion characteristics, including a non-metallic substrate including, on its surface, texture grooves having a line density of 7,500 lines/mm or more; an orientation-determining film; a non-magnetic undercoat layer; and a magnetic layer in order is disclosed. A production process for the medium; and a magnetic recording and reproducing apparatus are also disclosed.
Claims24
A magnetic recording medium comprising, in order, a non-metallic substrate having texture grooves having a line density of 7,500 lines/mm or more on its surface;
- an orientation-determining film;
- a non-magnetic undercoat layer;
- and a magnetic layer.
A process for producing a magnetic recording medium, which process comprises:
- a texturing step for forming texture grooves having a line density of 7,500 lines/mm or more on the surface of a non-metallic substrate;
- and
- a step for forming an orientation-determining film, a non-magnetic undercoat layer, and a magnetic layer on the non-metallic substrate.
Dependencies are inferred from the claim text.