Claims
- 1. A magnetic memory device, comprising:
a drive motor and head assembly; and one or more magnetic disks comprising:
a substrate having a super smooth surface; a thin metallic layer on the super smooth surface of the substrate and having a surface opposite the super smooth surface of the substrate, the thin metallic layer comprising a material selected to bind to the substrate and to mask chemical and mechanical variations of the substrate, and to reactively or catalytically nucleate the electroless plating of nickel alloy; a nickel alloy layer on the surface of the thin metallic layer, the nickel alloy layer having a super smooth surface; and a magnetic layer on the super smooth surface of the nickel alloy layer.
- 2. The device of claim 1, wherein said substrate comprises an alloy of aluminum.
- 3. The device of claim 1, wherein said substrate comprises a highly polished, cold-worked alloy of aluminum.
- 4. The device of claim 1, wherein said nickel alloy layer comprises a non-magnetic, nickel-phosphorous alloy.
- 5. The device of claim 1, wherein said metallic layer comprises a reactively nucleating material.
- 6. The device of claim 1, wherein said metallic layer comprises a sacrificial layer comprising zinc.
- 7. The device of claim 1, wherein said metallic layer comprises a catalytically nucleating material.
- 8. The device of claim 1, wherein said metallic layer comprises a non-magnetic nickel-phosphorus alloy.
- 9. The device of claim 1, wherein said metallic layer comprises a non-magnetic iron alloy, a non-magnetic cobalt alloy or a non-magnetic nickel alloy.
- 10. The device of claim 1, wherein said metallic layer comprises a first binder layer on the super smooth surface of the substrate, and a second nucleating layer on the first binder layer.
- 11. The device of claim 1, wherein said metallic layer comprises a first binder layer on the super smooth surface of the substrate, and a second nucleating layer on the first binder layer, and wherein the first binder layer comprises a material selected from the group comprising chromium, titanium, alloy mixtures of chromium and titanium, alloy mixtures of chromium and vanadium, alloy mixtures of titanium and tungsten and other metallic mixtures or elements known as promoters of adhesion.
- 12. The device of claim 1, wherein said substrate comprises ceramic or glass.
- 13. The device of claim 1, wherein said substrate comprises magnesium, magnesium alloy, titanium, titanium alloy, beryllium copper, manganese steel, or austenitic stainless steel.
- 14. The device of claim 1, wherein said substrate comprises organic material.
- 15. The device of claim 1, wherein said substrate comprises polymeric material.
- 16. The device of claim 1, wherein said substrate comprises carbon, graphitic substances or composites thereof.
- 17. The device of claim 1, wherein said substrate has a first side and a second side, and said thin metallic layer, said nickel alloy layer, and said magnetic layer are applied to only said first side of said substrate.
RELATED APPLICATIONS
[0001] The present application is a divisional of pending Application Ser. No. 09/894,375 filed Jun. 27, 2001 entitled Method of Coating Smooth Electroless Nickel on Magnetic Memory Disks and Related Memory Devices, which application claims the benefit under 35 U.S.C. 119(e), and all other available benefits, of prior U.S. Provisional Application No. 60/252,365; filed Nov. 21, 2000; entitled Method of Coating Electroless Nickel On Magnetic Memory Disks and Related Memory Devices; invented by Leonard Nanis, which is incorporated by reference as if fully set forth herein.
Provisional Applications (1)
|
Number |
Date |
Country |
|
60252365 |
Nov 2000 |
US |
Divisions (1)
|
Number |
Date |
Country |
Parent |
09894375 |
Jun 2001 |
US |
Child |
10427158 |
May 2003 |
US |