Optical media having graphene wear protection layers

• US 8,663,771 B2
• Filed: 05/05/2013
• Issued: 03/04/2014
• Est. Priority Date: 05/13/2012
• Status: Active Grant

• Current Assignee: Tyson York Winarski
• Original Assignee: Tyson York Winarski
• Inventors: Winarski, Tyson York
• Primary Examiner(s): MULVANEY, ELIZABETH EVANS
• Application Number:
  US13/887,322
• Publication Number:
  US 20130302553A1
• Time in Patent Office: 303 Days
• Field of Search: 428/6.1, 428/64.4, 430/270.11, 430/270.12, 430/270, 430/13
• US Class Current: 428/64.1
• CPC Class Codes: G11B 7/254 of protective topcoat layers
• CPC Class Codes: G11B 7/2548 consisting essentially of inorganic materials
• CPC Class Codes: Y10T 428/21 Circular sheet or circular blank

Abstract

An optical storage medium is disclosed that includes an optical disc having layers of graphene on one or both sides of the disc to provide wear protection against scratches and mechanical abrasion. Grahpene is a hard material that is 97.7% optically transparent. Thus, layers of graphene at or near the exterior sides of an optical disc provide wear protection to the optical media from mechanical abrasion and scratches while allowing laser light to pass through the graphene layers to read or write to the optical media.

Claims

1. An optical disc, comprising:

a disc having an optical recording layer; and

a wear protection layer comprising an annular sheet of graphene encapsulated within a matrix.

2. The optical disc of claim 1, wherein said annular sheet of graphene is formed of a single contiguous sheet of graphene.

3. The optical disc of claim 2, wherein said annular sheet of graphene has a uniform thickness, thereby providing uniform transmission of light through said wear protection layer to facilitate uniform reading and writing of information to and from said optical recording layer.

4. The optical disc of claim 1, wherein said annular sheet of graphene is formed of a single contiguous monolayer of carbon atoms.

5. The optical disc of claim 1, wherein a center of said annular sheet of graphene is located at a center of said optical disc, said annular sheet of graphene has an inner radius that has a length that is less than an inner radius of said optical recording layer, and said annular sheet of graphene has an outer radius that has a length that is greater than an outer radius of said optical recording layer.

6. The optical disc of claim 1, wherein said wear protection layer further comprising a plurality of annular sheets of graphene stacked vertically such that each of said plurality of annular sheets of graphene share a common center point.

7. The optical disc of claim 1, wherein said annular sheet of graphene sheet being attached to said disc with an adhesive.

8. The optical disc of claim 1, wherein said wear protection layer comprises a seed layer upon which said annular sheet of graphene is deposited.

9. The optical disc of claim 1, wherein said annular sheet of graphene is formed of a plurality of annular pie-shaped graphene wedges.

10. The optical disc of claim 1, wherein said matrix is made of a material selected from the group consisting of an adhesive, a glass, a polymer, and a resin.

11. The optical disc of claim 1, further comprising a second annular sheet of graphene, wherein said optical media is positioned between the two annular sheets of graphene.

12. An optical disc, comprising:

a disc having an optical recording layer; and

a wear protection layer comprising an annular sheet of graphene embedded within a matrix.

13. The optical disc of claim 12, wherein said matrix is formed of a material that is soluble to facilitate the embedding of said annular sheet of graphene within said matrix when at least a portion of said material is in at least a partially dissolved state.

14. The optical disc of claim 13, wherein said matrix is formed of a material that is softened by flash-heating to facilitate the embedding of said annular sheet of graphene within said matrix when at least a portion of said material is in a softened state.

15. The optical disc of claim 12, wherein said annular sheet of graphene is formed of a single contiguous sheet of graphene.

16. The optical disc of claim 15, wherein said annular sheet of graphene has a uniform thickness, thereby providing uniform transmission of light through said wear protection layer to facilitate uniform reading and writing of information to and from said optical recording layer.

17. The optical disc of claim 12, wherein said annular sheet of graphene is formed of a single contiguous monolayer of carbon atoms.

18. The optical disc of claim 12, wherein a center of said annular sheet of graphene is located at a center of said optical disc, said annular sheet of graphene has an inner radius that has a length that is less than an inner radius of said optical recording layer, and said annular sheet of graphene has an outer radius that has a length that is greater than an outer radius of said optical recording layer.

19. The optical disc of claim 12, wherein said annular sheet of graphene is formed of a plurality of annular pie-shaped graphene wedges.

20. The optical disc of claim 12, further comprising a second annular sheet of graphene, wherein said optical media is positioned between the two annular sheets of graphene.