Methods for making data storage media and the resultant media

• US 20040143958A1
• Filed: 01/14/2004
• Published: 07/29/2004
• Est. Priority Date: 02/12/1999
• Status: Active Grant

• Current Assignee: Sabic Innovative Plastics IP BV (Government of Saudi Arabia)
• Original Assignee: Sabic Innovative Plastics IP BV (Government of Saudi Arabia)
• Inventors: Davis, John E., Gorczyca, Thomas B., Cole, Herbert S., Woods, Joseph T., Bushko, Wit C., Feist, Thomas P.
• Granted Patent: US 7,299,535 B2
• Time in Patent Office: Days
• US Class Current: 29/602.1
• CPC Class Codes: B29C 2043/025 forming a microstructure, i.e. fine patterning
• CPC Class Codes: B29C 43/021 characterised by the shape of the surface
• CPC Class Codes: B29D 17/005 Producing optically read record carriers, e.g. optical discs
• CPC Class Codes: B29L 2017/005 CD''s, DVD''s
• CPC Class Codes: B82Y 10/00 Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: G11B 11/10582 Record carriers characterised by the selection of the material or by the structure or form
• CPC Class Codes: G11B 11/10584 characterised by the form, e.g. comprising mechanical protection elements
• CPC Class Codes: G11B 11/10586 characterised by the selection of the material
• CPC Class Codes: G11B 2007/25708 containing group 13 elements (B, Al, Ga)
• CPC Class Codes: G11B 2007/25713 containing nitrogen
• CPC Class Codes: G11B 5/72 Protective coatings, e.g. anti-static or antifriction
• CPC Class Codes: G11B 5/73913 Composites or coated substrates
• CPC Class Codes: G11B 5/73919 Aluminium or titanium elemental or alloy substrates
• CPC Class Codes: G11B 5/73921 Glass or ceramic substrates
• CPC Class Codes: G11B 5/84 Processes or apparatus specially adapted for manufacturing record carriers
• CPC Class Codes: G11B 5/8404 manufacturing base layers
• CPC Class Codes: G11B 5/855 Coating only part of a support with a magnetic layer
• CPC Class Codes: G11B 7/24038 Multiple laminated recording layers
• CPC Class Codes: G11B 7/24047 Substrates
• CPC Class Codes: G11B 7/24056 : Light transmission layers lying on the light entrance side and being thinner than the substrate, e.g. specially adapted for Blu-ray® discs
• CPC Class Codes: G11B 7/253 : of substrates
• CPC Class Codes: G11B 7/2531 : comprising glass
• CPC Class Codes: G11B 7/2532 : comprising metals
• CPC Class Codes: G11B 7/2533 : comprising resins
• CPC Class Codes: G11B 7/2534 : polycarbonates [PC]
• CPC Class Codes: G11B 7/2536 : polystyrene [PS]
• CPC Class Codes: G11B 7/2542 : consisting essentially of organic resins
• CPC Class Codes: G11B 7/2548 : consisting essentially of inorganic materials
• CPC Class Codes: G11B 7/2578 : consisting essentially of inorganic materials
• CPC Class Codes: G11B 7/258 : of reflective layers
• CPC Class Codes: G11B 7/259 : based on silver
• CPC Class Codes: G11B 7/26 : Apparatus or processes specially adapted for the manufacture of record carriers
• 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: G11C 13/02 : using elements whose operation depends upon chemical change G11C13/0009 takes precedence
• CPC Class Codes: G11C 13/025 : using fullerenes, e.g. C60, or nanotubes, e.g. carbon or silicon nanotubes
• CPC Class Codes: Y10T 156/1002 : with permanent bending or reshaping or surface deformation of self sustaining lamina
• CPC Class Codes: Y10T 29/49002 : Electrical device making
• CPC Class Codes: Y10T 29/4902 : Electromagnet, transformer or inductor
• CPC Class Codes: Y10T 29/4903 : with bonding
• CPC Class Codes: Y10T 29/49043 : Depositing magnetic layer or coating
• CPC Class Codes: Y10T 29/49069 : Data storage inductor or core
• CPC Class Codes: Y10T 29/49158 : with molding of insulated base
• CPC Class Codes: Y10T 29/49172 : by molding of insulating material
• CPC Class Codes: Y10T 29/49176 : with molding of electrically insulating material
• CPC Class Codes: Y10T 428/24355 : Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
• CPC Class Codes: Y10T 428/24479 : including variation in thickness
• CPC Class Codes: Y10T 428/24967 : Absolute thicknesses specified
• CPC Class Codes: Y10T 428/265 : 1 mil or less
• CPC Class Codes: Y10T 428/266 : of base or substrate
• CPC Class Codes: Y10T 428/31 : Surface property or characteristic of web, sheet or block
• CPC Class Codes: Y10T 428/3154 : Of fluorinated addition polymer from unsaturated monomers

Abstract

Methods for forming data storage media and the media formed thereby are disclosed herein. In one embodiment, the method for forming a data storage media, comprises: injection molding a substrate comprising surface features, wherein said surface features have greater than about 90% of a surface feature replication of an original master; and disposing a data layer over at least one surface of said substrate; wherein said data storage media has an axial displacement peak of less than about 500μ under shock or vibration excitation.

Claims

1. A method for forming a data storage media, comprising:

injection molding a substrate comprising surface features, wherein said surface features have greater than about 90% of a surface feature replication of an original master; and

disposing a data layer over at least one surface of said substrate;

wherein said data storage media has an axial displacement peak of less than about 500μ

under shock or vibration excitation.

2. The method of claim 1, wherein said substrate comprises a material selected from the group consisting of metal, glass, ceramic, metal-matrix composite, and alloys and combinations comprising at least one of the foregoing materials.

3. The method of claim 1, wherein said material comprises aluminum.

4. The method of claim 1, further comprising disposing a core within said substrate.

5. The method of claim 4, wherein said core further comprises a varied thickness.

6. The method of claim 4, wherein said core further comprises a cross-sectional geometry selected from the group consisting of concave, convex, tapered, and combinations comprising at least one of the foregoing core geometries.

7. The method of claim 4, wherein said core further comprises a core outer diameter substantially equal to a substrate outer diameter.

8. The method of claim 4, wherein said core further comprises a geometry selected from the group consisting of a radial arm, a ring, star-like, and combinations comprising at least one of the foregoing geometries.

9. The method of claim 4, wherein said core further comprises at least one hollow cavity.

10. The method of claim 4, wherein said core further comprises at least one filled cavity.

11. The method of claim 10, wherein said filled cavity comprises a material selected from the group consisting of glass, foams, carbon, metals, ceramics, thermoplastics, thermosets, rubbers, others and composites, alloys, and combinations comprising at least one of the foregoing materials.

12. The method of claim 4, further comprising performing said core.

13. The method of claim 1, further comprising reinforcing said substrate with a material selected from the group consisting of glass, foams, carbon, metals, ceramics, thermoplastics, thermosets, rubbers, and composites, alloys, and combinations comprising at least one of the foregoing materials.

14. The method of claim 1, wherein said data layer has a coercivity of greater than about 1,500 oersted.

15. The method of claim 14, wherein said coercivity is greater than about 3,000 oersted.