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US 7,147,790 B2Granted
Perpendicular magnetic discrete track recording disk
AssigneeKomag, Inc.
InventorsDavid E. Wachenschwanz, Gerardo A. Bertero, David Treves, Andrew Homola, James L. Chao, Christopher H. Bajorek
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Abstract
A method of forming a discrete track recording pattern on a soft magnetic underlayer of a perpendicular magnetic recording disk. In one embodiment, the soft magnetic underlayer is continuous throughout the discrete track recording pattern.
Claims41
A method of fabrication, comprising:
- disposing a soft magnetic underlayer on a substrate;
- forming a discrete track recording pattern on the soft magnetic underlayer;
- and
- retaining the soft magnetic underlayer continuous throughout the discrete track recording pattern;
- disposing a magnetic recording layer above the soft magnetic underlayer;
- and
- permanently retaining the magnetic recording layer above the soft magnetic underlayer.
4 more elements
A method of fabrication, comprising:
- disposing a soft magnetic underlayer on a substrate;
- and
- forming a discrete track recording pattern on the soft magnetic underlayer using a subtractive process, wherein the soft magnetic underlayer is continuous throughout the discrete track recording pattern, wherein forming further comprises:
- coating the soft magnetic underlayer with an embossable layer;
- and
- imprinting the embossable layer with the discrete track recording pattern;
- disposing a magnetic recording layer above the soft magnetic underlayer;
- and
- permanently retaining the magnetic recording layer above the soft magnetic underlayer.
6 more elements
A method of fabricating a perpendicular recording disk, the method comprising:
- forming a discrete track recording pattern on a layer;
- disposing a soft magnetic underlayer above the layer to form a continuous soft magnetic underlayer above the discrete track recording pattern;
- and
- disposing a magnetic recording layer above the continuous soft magnetic underlayer;
- and
- permanently retaining the magnetic recording layer above the continuous soft magnetic underlayer.
3 more elements
Dependencies are inferred from the claim text.