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US 8,263,190 B2Granted
Method of producing magnetic recording medium, and magnetic recording and reading device
AssigneeShowa Denko K.K.
InventorsMasato Fukushima, Akira Sakawaki, Yasumasa Sasaki
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Abstract
The present invention aims to provide a method of producing a magnetic recording medium which is a method of producing a magnetic recording medium having a magnetically-separated magnetic recording pattern, the method including: forming a magnetic layer on a non-magnetic substrate; then exposing a surface of the magnetic layer partially to reactive plasma, or a reactive ion generated in the plasma to amorphize the portion of the magnetic layer.
Claims13
A method of producing a magnetic recording medium having a magnetically-separated magnetic recording pattern, the method comprising:
- forming a magnetic layer over a non-magnetic substrate;
- and
- then exposing a surface of the magnetic layer partially to reactive plasma, or a reactive ion generated in the plasma to amorphize a portion of the magnetic layer and to modify the magnetic properties of the portion whereby a magnetically-separated magnetic recording pattern is formed,
- wherein the reactive plasma includes a halogen ion to form a halide of a substance constituting the magnetic layer, and removing the halogen from the halide in the portion of the magnetic layer which is exposed to the halogen ion to form a portion that does not substantially include a halide of a substance constituting the magnetic layer.
1 more element
Dependencies are inferred from the claim text.