One magnetic sided media for low cost and low capacity applications
AssigneeHitachi Global Storage Technologies Netherlands B.V.
InventorsShanlin Duan, Kenneth Johnson, Owen Melroy
Life of this patent
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Abstract
One-sided magnetic media for a hard disk drive. Methods are implemented to create a magnetic media with only one surface capable of recording data. The second surface is a non-data recording side of the media and is constructed so that it does not interfere with the recording properties of the recording side or the structural usefulness of the media. Additionally, the second surface can be a low quality surface capable of limited magnetic recording.
Claims25
A method of making a one sided media disk including the steps of:
- determining if a second side of a substrate is defective and a first side of the substrate is not defective;
- forming a high quality magnetic recording layer on only the first side of the substrate if after the step of determining, it is determined that the second side of substrate is defective and the first side of a substrate is not defective;
- forming at least one of an underlayer and an adhesion layer including CrTi on the first and the second side of the substrate;
- and
- forming a protective layer on the first side and the second side of the substrate after the step of forming a high quality magnetic recording layer on only the first side of the substrate.
A method of making a one sided media disk including the steps of:
- determining if a second side of a substrate is defective and a first side of the substrate is not defective;
- forming a high quality magnetic recording layer on only the first side of the substrate if after the step of determining, it is determined that the second side of substrate is defective and the first side of a substrate is not defective;
- forming at least one of an underlayer and an adhesion layer including AlTi on the first and the second side of the substrate;
- and
- forming a protective layer on the first side and the second side of the substrate after the step of forming a high quality magnetic recording layer on only the first side of the substrate.
A method of making a one sided media disk including the steps of:
- determining if a second side of a substrate is defective and a first side of the substrate is not defective;
- forming a high quality magnetic recording layer on only the first side of the substrate if after the step of determining, it is determined that the second side of substrate is defective and the first side of a substrate is not defective and;
- forming a protective layer on the first side and the second side of the substrate after the step of forming a high quality magnetic recording layer on only the first side of the substrate,
- wherein the first side of the substrate includes patterning for a patterned media application and the second side of the substrate includes a defective pattern for a patterned media application.
Dependencies are inferred from the claim text.