Claims
- 1. An optical disk, comprising:
a substrate having a circular first surface and an opposing circular second surface, wherein the outer diameter of the first and second surface is approximately less than 50 mm; a spiral pattern of bumps on a first portion of the circular first surface, wherein information is stored on and read from the bumps; a spiral land on a second portion of the circular first surface, wherein information is written to and read from the land; and a continuous multi-layer optical coating overlaying the bumps and land on the circular first surface, wherein the optical coating comprises:
a metal/alloy layer comprising tin, antimony and an element selected from the group consisting of indium, germanium, aluminum, and zinc; and a dielectric layer overlaying the metal/alloy layer.
- 2. The disk of claim 1, wherein the outer diameter of the first and second surface is approximately 32 mm or less.
- 3. The disk of claim 1, wherein the thickness of the substrate is approximately 0.6 mm±0.03 mm.
- 4. The disk of claim 1, wherein the width of the bumps is between approximately 200 nm and 250 nm, the width measured at half-width full-max.
- 5. The disk of claim 1, wherein the width of the bumps is 30%±3% of the track pitch of the bumps, the track pitch being the distance between the centerlines of adjacent bumps along the radial direction.
- 6. The disk of claim 1, wherein the average distance between centerlines of adjacent bumps along the radial direction is 0.74 μm±0.03 μm.
- 7. The disk of claim 1, wherein the height of the bumps is between approximately 80 nm and 90 nm.
- 8. The disk of claim 1, wherein the bumps comprise sidewalls at an angle between 30° and 50°, as measured along the first circular surface.
- 9. The disk of claim 8, wherein the angle is approximately 45°.
- 10. The disk of claim 1, wherein the distance between two of the bumps in a radially adjacent direction is between approximately 485 nm and 545 nm, measured at full width half max.
- 11. The disk of claim 1, wherein the length of the bumps, covered by the optical coating, are multiples of 179 nm, the shortest length being a third multiple and the longest length being a fourteenth multiple.
- 12. The disk of claim 1, wherein the height of the land is between approximately 80 nm and 90 nm.
- 13. The disk of claim 1, wherein the width of the land is approximately 400 nm±50 nm, the width measured at half-width full-max.
- 14. The disk of claim 1, wherein the width of the land is approximately 55% of the track pitch of the land, the track pitch being the distance between the centerlines of radially adjacent portions of the land.
- 15. The disk of claim 1, wherein the average distance between centerlines of radially adjacent portions of the land is between approximately 0.70 μm to 0.78 μm.
- 16. The disk of claim 1, wherein the land comprises sidewalls at an angle between 30° and 50°, as measured along the first circular surface.
- 17. The disk of claim 16, wherein the angle is approximately 45°.
- 18. The disk of claim 1, wherein the land has sinusoidal wobbles.
- 19. The disk of claim 18, wherein the amplitude of the wobbles along the radial direction is 55±15 nm.
- 20. The disk of claim 18, wherein the amplitude of the wobbles along the radial direction is 7.5%±2% of the track pitch of the land, the track pitch being the distance between the centerlines of radially adjacent portions of the land.
- 21. The disk of claim 18, wherein the frequency of the wobbles is approximately 128 kHz.
- 22. The disk of claim 18, further comprising high frequency wobble marks (HFWMs) along the wobbles.
- 23. The disk of claim 22, wherein the frequency of the HFWMs is approximately 3 to 5 times the frequency of the wobbles.
- 24. The disk of claim 22, wherein the frequency of the HFWMs is between approximately 384 kHz to 641 kHz.
- 25. The disk of claim 18, wherein the amplitude of the wobbles and HFWMs is within ±25% of each other.
- 26. The disk of claim 1, wherein the dielectric layer comprises silicon oxynitride.
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation-in-part of U.S. Pat. Appl. Ser. No. 09/854,333, filed May 11, 2001, which is a continuation-in-part of U.S. Pat. Appl. Ser. No. 09/764,042, filed Jan. 16, 2001.
Continuation in Parts (2)
|
Number |
Date |
Country |
Parent |
09854333 |
May 2001 |
US |
Child |
10107854 |
Mar 2002 |
US |
Parent |
09764042 |
Jan 2001 |
US |
Child |
09854333 |
May 2001 |
US |