Claims
- 1. A data storage medium comprising:
- a pattern of lands and pits;
- at least one of said pits including a raised ridge; and
- wherein said raised ridge is coated with a reflective layer to record a predetermined data bit.
- 2. A data storage medium according to claim 1, further including a protective layer formed over said pattern of lands and pits.
- 3. A data storage medium according to claim 2, wherein said protective layer includes at least one layer made of any of: aluminum nitride (AIN), glass, plastic, or polymer material.
- 4. A data storage medium according to claim 1, wherein said pattern of lands and pits is formed on a data substrate.
- 5. A data storage medium according to claim 4, further including a support substrate that is at least partly transmissive to light.
- 6. A data storage medium according to claim 5, further including a protective undercoat layer which is at least partly transmissive, and which is disposed between said data substrate and said support substrate.
- 7. A data storage medium according to claim 5, wherein said support substrate and said data substrate have a combined thickness ranging between approximately 1 mm and approximately 2 mm.
- 8. A data storage medium according to claim 5, further including a light transmissive undercoat formed between said support substrate and said data substrate.
- 9. A data storage medium according to claim 5, wherein said support substrate has a thickness that ranges between approximately 1 mm and approximately 2 mm.
- 10. A data storage medium according to claim 5, wherein said data substrate is formed on said support substrate.
- 11. A data storage medium according to claim 5, wherein said data substrate is deposited on said support substrate.
- 12. A data storage medium according to claim 5, wherein said data substrate is bonded to said support substrate.
- 13. A data storage medium according to claim 5, wherein said support substrate is fully transmissive to light.
- 14. A data storage medium according to claim 5, wherein said data substrate and said support substrate form a single integral layer.
- 15. A data storage medium according to claim 4, wherein said data substrate includes two or more layers of different transmissive phase changes.
- 16. A data storage medium according to claim 4, wherein said data substrate has a thickness ranging between approximately 5 nm and approximately 60 nm.
- 17. A data storage medium according to claim 4, further including a writeable optical storage film that coats said data substrate.
- 18. A data storage medium according to claim 4, wherein said data substrate is formed of an erasable optical storage film.
- 19. A data storage medium according to claim 4, wherein said data substrate is formed of a phase change optical storage film.
- 20. A data storage medium according to claim 4, wherein said data substrate is formed of rare earth or transition metal material.
- 21. A data storage medium according to claim 4, wherein said data substrate is formed of two or more erasable and writeable optical storage films.
- 22. A data storage medium according to claim 4, further including a light transmissive overcoat formed on top of said data substrate.
- 23. A data storage medium according to claim 1, further including a pattern of ridges interposed between adjacent lands and pits.
- 24. A data storage medium according to claim 23, wherein said ridges are sloped and disposed at predetermined angles relative to said pits.
- 25. A data storage medium according to claim 24, wherein said predetermined angles vary with the placement of the ridges relative to an inner diameter track and an outer diameter track.
- 26. A data storage medium according to claim 24, wherein said reflective coating is any of: flat, concave or convex.
CROSS-REFERENCE TO RELATED APPLICATIONS
The present patent application is a continuation application of the following patent applications by the same applicant herein, assigned to the same assignee, all of which are incorporated herein by reference:
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5500266 |
Durnin |
Mar 1996 |
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5574715 |
Namba et al. |
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Related Publications (3)
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Date |
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779462 |
Jan 1997 |
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779461 |
Jan 1997 |
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779394 |
Jan 1997 |
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Continuations (1)
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779463 |
Jan 1997 |
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