Stock material or miscellaneous articles – Circular sheet or circular blank – Recording medium or carrier
Patent
1997-10-01
2000-11-14
Kiliman, Leszek
Stock material or miscellaneous articles
Circular sheet or circular blank
Recording medium or carrier
428 653, 428694ST, 428694SG, 428694TR, 428694TM, 428900, 427128, 427129, 427130, 360133, 360135, 205 90, 205119, 205217, G11B 566
Patent
active
061467359
ABSTRACT:
A mini-floppy disk or like information storage device is comprised of a circle of data storage medium having a central metal hub. In use, the hub is contacted with and driven by a magnetized spindle. The hub comprises a ferromagnetic substrate and a metal coating. The coating has magnetization B.sub.s which is less than the magnetization of the substrate. The coating is harder than the substrate, preferably greater than 400 DPH hardness number. The coating is deposited with an amorphous microstructure while the substrate is crystalline. The coating has a nodular surface texture and surface oxide film which provides improved adhesive bond strength, where the medium is joined to the hub. The coating preferably is an electroless plating deposit, comprised of nickel or cobalt base metal, with phosphorous or boron additive; most preferably it is nickel-11% phosphorous.
REFERENCES:
patent: 4063295 (1977-12-01), Mann et al.
patent: 4068271 (1978-01-01), Kok
patent: 4244788 (1981-01-01), Faulkner
patent: 4757412 (1988-07-01), Iizuka et al.
patent: 4868699 (1989-09-01), Kingsbury et al.
patent: 4910625 (1990-03-01), Albrecht et al.
patent: 4967184 (1990-10-01), Regelsberger
patent: 5289456 (1994-02-01), Takahashi
patent: 5896241 (1999-04-01), Hilton
W. Riedel "Electroless Nickel Plating" ASM International (1991) pp. 1-159; 204-220; 261-281.
V.G. Shawnan et al. "Chemisch-Nickel Richtig Einsetzen," Galvinotechnik V. 73 N. 3 Mar. 1986, pp. 550-560.
J. Hajdu et al. "Comparison of Electroless Deposits for Electro-Magnetic Interference Shielding" Plating & Surface Finishing; pp. 42-44; (Jul. 1983).
Component Technologies, Inc.
Kiliman Leszek
Nessler C. G.
LandOfFree
Information storage device having coated metal hub does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Information storage device having coated metal hub, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Information storage device having coated metal hub will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2063051