Process for producing magnetic recording medium
First Claim
1. A process for producing a magnetic recording medium comprising a non-magnetic substrate, a first magnetic recording layer comprising an ordered alloy, and a second magnetic recording layer comprising an ordered alloy, the process comprising the steps of:
- (A) forming the first magnetic recording layer while monotonously changing a substrate temperature; and
(B) forming the second magnetic recording layer while monotonously changing the substrate temperature wherein material of the second magnetic recording layer is different from material of the first recording layer,wherein the substrate temperature at beginning of the step (B) is set such that magnetic anisotropy constant of the first magnetic recording layer and magnetic anisotropy constant of the second magnetic recording layer is changed monotonously at interface between the first and the second magnetic recording layers.
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Abstract
The problem of the invention is to provide a process for producing a magnetic recording medium which exhibits both of excellent thermal stability and favorable writing capability. The process for producing the magnetic recording medium of the invention includes the steps of: (A) forming the first magnetic recording layer while monotonously changing a substrate temperature; and (B) forming the second magnetic recording layer while monotonously changing the substrate temperature wherein the material of the second magnetic recording layer is different from the material of the first recording layer, wherein the substrate temperature at the beginning of the step (B) is set such that the magnetic anisotropy constant of the first magnetic recording layer and the magnetic anisotropy constant of the second magnetic recording layer is changed monotonously at the interface between the first and second magnetic recording layers.
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9 Claims
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1. A process for producing a magnetic recording medium comprising a non-magnetic substrate, a first magnetic recording layer comprising an ordered alloy, and a second magnetic recording layer comprising an ordered alloy, the process comprising the steps of:
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(A) forming the first magnetic recording layer while monotonously changing a substrate temperature; and (B) forming the second magnetic recording layer while monotonously changing the substrate temperature wherein material of the second magnetic recording layer is different from material of the first recording layer, wherein the substrate temperature at beginning of the step (B) is set such that magnetic anisotropy constant of the first magnetic recording layer and magnetic anisotropy constant of the second magnetic recording layer is changed monotonously at interface between the first and the second magnetic recording layers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification