REPLICA DISK FOR DATA STORAGE

• US 20130121128A1
• Filed: 12/28/2012
• Published: 05/16/2013
• Est. Priority Date: 04/06/1998
• Status: Active Grant

• Current Assignee: Max Blu Technologies, LLC (IP Investments Group LLC)
• Original Assignee: Legger COL AB LLC (Intellectual Ventures LLC)
• Inventors: Edwards, Jathan D., Kerfeld, Donald J.
• Granted Patent: US 8,593,931 B2
• Time in Patent Office: Days
• US Class Current: 369/275.4
• CPC Class Codes: G11B 23/0085 intermediate mediums using a photosensitive material, e.g. photo-resist
• CPC Class Codes: G11B 7/24 Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the arrangement of information on the carrier G11B7/007
• CPC Class Codes: G11B 7/24091 Combinations of pits and tracks with specific interrelation
• CPC Class Codes: G11B 7/261 Preparing a master, e.g. exposing photoresist, electroforming
• CPC Class Codes: G11B 7/263 Preparing and using a stamper, e.g. pressing or injection molding substrates production of optical record carriers, e.g. optical discs B29D17/005
• CPC Class Codes: Y10S 425/81 Sound record

Abstract

Data storage replica disks having a surface relief pattern with replica lands and replica grooves are provided.

Claims

1. A replica disk, comprising:

a replica substrate having a first surface that includes a surface pattern defined by lands and grooves,

wherein the surface pattern has a track pitch that is less than 425 nanometers, and

wherein the grooves have depths less than 120 nanometers.

2. The replica disk of claim 1, wherein the depths of the grooves are less than 40 nanometers.

3. The replica disk of claim 1, wherein the lands have tops with widths between 100 nanometers and 200 nanometers.

4. The replica disk of claim 3, wherein the tops of the lands have widths that are greater than 25 percent of the track pitch.

5. The replica disk of claim 4, wherein the tops of the lands have widths that are greater than 35 percent of the track pitch.

6. The replica disk of claim 1, wherein the lands have tops that are substantially flat and coplanar.

7. The replica disk of claim 1, wherein the depths of the grooves are less than 80 nanometers.

8. The replica disk of claim 3, wherein the tops of the lands have widths between 140 nanometers and 180 nanometers.

9. The replica disk of claim 1, wherein the depths of the grooves are less than 60 nanometers.

10. The replica disk of claim 1, wherein the lands and grooves are inverse of corresponding features on a master disk used in a process of creating the replica disk.

15. The replica disk of claim 1, wherein the depths of the grooves are greater than 20 nanometers.

11. A replica disk, comprising:

a replica substrate having a first surface that includes a surface pattern defined by lands and grooves,

wherein the surface pattern has a track pitch that is less than 425 nanometers,

wherein tops of the lands define widths that are less than 200 nanometers, and

wherein the widths of the tops of the lands are greater than 25 percent of the track pitch.

12. The replica disk of claim 11, wherein the widths of the tops of the lands are greater than 35 percent of the track pitch.

13. The replica disk of claim 11, wherein the tops of the lands are substantially flat and coplanar.

14. The replica disk of claim 11, wherein the tops the lands have widths that are greater than 100 nanometers.