Replicated regions on optical disks
AssigneeImation Corp.
InventorsAnthony O. Banal, Ted L. Bahns, Kristi L. Chavez, Donald J. Kerfeld, Chad R. Sandstrom
Life of this patent
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Abstract
The invention is directed toward techniques for stamping optical data storage disks. A master is first created to include several distinct information regions etched upon a master surface. The master is then used to create one or more stampers. The stampers include a number of distinct stamper regions in locations corresponding to locations of the distinct information regions on the master. The stamper is then used to create a number of first replica disks that include distinct replicated regions. The distinct replicated regions are removed from the first replica disks to define second disks.
Claims13
A method comprising:
- creating a master having distinct information regions etched upon a surface, wherein creating the master includes coating a master glass with a photoresist, placing the master glass in a master glass carrier, wherein the center of the master glass is offset from the center of the master glass carrier, exposing the photoresist to a laser to define one of the distinct information regions, rotating the master glass relative to the master glass carrier, exposing the photoresist to the laser to define another one of the distinct information regions, and developing the photoresist;
- creating a stamper from the master;
- stamping a first disk with the stamper, the first disk including replicated regions in locations substantially corresponding to locations of the distinct information regions on the master;
- and
- separating the replicated regions from the first disk to create a number of second disks from the first disk.
A method comprising:
- creating a master having distinct information regions etched upon a surface;
- creating a first stamper from the master, wherein creating the first stamper includes creating the first stamper to include an alignment mark;
- stamping a dual-sided first disk including replicated regions in locations substantially corresponding to locations of the distinct information regions on the master by placing the first stamper and a second substantially similar stamper into a dual-sided stamping tool, aligning the first stamper with the second stamper by aligning the alignment mark on the first stamper with an alignment mark on the second stamper, and stamping the dual-sided first disk using the dual-sided stamping tool;
- and
- separating the replicated regions from the dual-sided first disk to create a number of dual-sided second disks from the dual-sided first disk.
A method comprising:
- coating a master glass with a photoresist;
- offset placing the master glass in a master glass carrier, wherein the center of the master glass is offset from the center of the master glass carrier;
- exposing the photoresist to a laser to define a first distinct information region;
- rotating the master glass relative to the master glass carrier;
- exposing the photoresist to the laser to define a second distinct information region;
- and
- developing the photoresist.
Dependencies are inferred from the claim text.