Tilted media for hard disk drives and magnetic data storage devices
First Claim
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1. A digital storage medium, comprising:
- a substrate;
a first magnetic layer disposed over the substrate, wherein the first magnetic layer has a first magnetic moment having a tilted easy axis;
a second magnetic layer disposed over the first magnetic layer, wherein the second magnetic layer has a second magnetic moment having a tilted easy axis; and
an overcoat layer disposed over the second magnetic layer.
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Abstract
A digital storage medium for use in data storage devices has two magnetic layers where the respective easy axes of the magnetic moments in the two layers are perpendicular to each other. Exchange coupling of the magnetic moments in the magnetic layers produces a resultant magnetic moment that is tilted out of the plane of the digital storage medium. The resultant magnetic moment of the medium allows the use of either a ring head, a single pole head, or a head that generates a field tilted at an angle for write operations.
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Citations
40 Claims
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1. A digital storage medium, comprising:
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a substrate;
a first magnetic layer disposed over the substrate, wherein the first magnetic layer has a first magnetic moment having a tilted easy axis;
a second magnetic layer disposed over the first magnetic layer, wherein the second magnetic layer has a second magnetic moment having a tilted easy axis; and
an overcoat layer disposed over the second magnetic layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of manufacturing a digital storage medium, the method comprising:
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depositing a first magnetic layer on a substrate surface, wherein the first magnetic layer has a first magnetic moment with a first easy axis; and
depositing a second magnetic layer on the first magnetic layer, wherein the second magnetic layer has a second magnetic moment with a second easy axis;
wherein the second easy axis is perpendicular to the first easy axis; and
wherein exchange-coupling of the first magnetic moment and the second magnetic moment forms tilted easy axes in the first and second magnetic layers. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification