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US 2008/0090002 A1Published application
Magnetic recording medium, method for manufacturing recording medium and magnetic recording apparatus
AssigneeKabushiki Kaisha Toshiba
InventorsTomoyuki Maeda, Akira Kikitsu, Soichi Oikawa, Takeshi Iwasaki
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Abstract
A magnetic recording layer is formed on an under-layer comprising a Cu crystalline grain layer and a deposited nitrogen atom layer on the Cu crystalline grain layer surface. Then the magnetic recording layer comprising very small average grain diameter and sharp grain diameter distribution is obtained. The magnetic recording medium comprising the magnetic recording layer shows excellent signal to noise ratio at high density recording.
Claims6
A method for producing magnetic recording medium, comprising:
- a process for forming a grain diameter control layer comprising Cu crystalline grains on a substrate;
- a process for forming a deposited layer of nitrogen atoms depositing nitrogen on the grain diameter control under-layer surface;
- and
- a process for forming a magnetic recording-layer on the substrate having the nitrogen-layer deposited grain diameter control under-layer.
1 more element
Dependencies are inferred from the claim text.