Method for centering a hub in an optical disc, and an optical storage system using such disc
AssigneesImation Corp., Terastor Corporation
InventorsChad R. Sandstrom, Brian T. Bonn
Life of this patent
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Abstract
Optical storage system including a disc drive and an optical media having a low radial total indicated runout and method of manufacturing such media. The optical media includes a disc substrate having a formatted surface and a center hole. A disc alignment mechanism is provided, wherein the concentric registration of the formatted surface is specified relative to the disc alignment mechanism. A hub having a center hole is positioned at the disc center hole, wherein the hub center hole is centered relative to the disc alignment mechanism. The disc drive includes a drive spindle and a center pin extending from the drive spindle for centering the drive spindle to the optical media.
Claims20
An optical storage system including a disc drive and an optical media having a low radial total indicated runout, the optical media comprising:
- a disc substrate having a center hole, the disc substrate including a formatted surface and central region, wherein the central region is located between the formatted surface and the center hole;
- a disc alignment mechanism located within the central region and having a center axis, wherein the formatted surface is concentrically registered and the concentric registration of the formatted surface is specified relative to the disc alignment mechanism;
- and
- a hub having a hub center hole, the hub secured to only one side of the disc substrate and including a hub center wherein the hub center is precisely located concentric with the center axis of the disc alignment mechanism such that the hub center hole is centered relative to the disc alignment mechanism using the disc alignment mechanism in a separate centering process, wherein the hub is not receivable by the disc alignment mechanism;
- and
- the disc drive comprising:
- a drive spindle:
- and
- a center pin extending from the drive spindle for centering the drive spindle to the optical media.
An optical disc for the storage of a high capacity of information therein, the optical disc comprising:
- a disc substrate having a center hole, the disc substrate including a formatted surface and a central region, wherein the formatted surface includes a plurality of spiral or concentric tracks, and wherein the central region is located between the formatted surface and the center hole;
- a disc alignment mechanism located within the central region and having a center axis, wherein the formatted surface is concentrically registered and the concentric registration of the formatted surface is specified relative to the disc alignment mechanism;
- and
- a hub having a hub center, the hub secured to only one side of the disc substrate and positioned at the center hole, wherein the hub center is precisely located concentric with the center axis of the disc alignment mechanism, such that the hub is centered relative to the disc alignment mechanism using the disc alignment mechanism in a separate centering process, wherein the hub is not receivable by the disc alignment mechanism.
Dependencies are inferred from the claim text.