Thick film magnetic nanoparticulate composites and method of...

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Reexamination Certificate

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C428S404000, C428S405000, C428S406000, C428S407000, C427S202000, C427S216000, C427S376100, C427S376200

Reexamination Certificate

active

07485366

ABSTRACT:
Thick film magnetic/insulating nanocomposite materials, with significantly reduced core loss, and their manufacture are described. The insulator coated magnetic nanocomposite comprises one or more magnetic components, and an insulating component. The magnetic component comprises nanometer scale particles (about 1 to about 100 nanometers) coated by a thin-layered insulating phase. While the intergrain interaction between the immediate neighboring magnetic nanoparticles separated by the insulating phase provides the desired soft magnetic properties, the insulating material provides high resistivity, which reduces eddy current loss.

REFERENCES:
patent: 3330697 (1967-07-01), Pechini
patent: 4353958 (1982-10-01), Kita et al.
patent: 5230729 (1993-07-01), McCandlish et al.
patent: 5279994 (1994-01-01), Kerkar
patent: 5667716 (1997-09-01), Ziolo et al.
patent: 5952040 (1999-09-01), Yadav et al.
patent: 6045925 (2000-04-01), Klabunde et al.
patent: 6048920 (2000-04-01), Ziolo et al.
patent: 6162530 (2000-12-01), Xiao et al.
patent: 6447848 (2002-09-01), Chow et al.
patent: 6720074 (2004-04-01), Zhang et al.
patent: 6773765 (2004-08-01), Gambino et al.
patent: 2005/0200438 (2005-09-01), Renaud et al.
Leslie-Pelecky et al, “Magnetic Properties of NanoStructured Materials”, Chem. Mater.199:1770-1783.
Hayakawa et al., “High Resistive Nanocrystalline FE-M-O . . . ” J.Appl. Phys. 81(8), Apr. 15, 1997; 3747-3752.
H. Gleiter, Materials With Ultrafine Microstructures: Retrospectives and Perspectives, Nanostructured Materials, vol. 1, pp. 1-19, 1992.
C.G. Granqvist and R.A. Buhrman, “Ultrafine Metal Particles”, Journal of Applied Physics, vol. 47, No. 5 pp. 2200-2219., May 1976.
D.L. Leslie-Pelecky, et al., “Self-Stabilized Magnetic Colloids: Ultrafine Co Particles in Polymers”, Journal of Applied Physics, 79 (8), pp. 5312-5314, Apr. 15, 1996.
Y.D. Zhang, et al., “Nanocomposite Co/SiO2 Soft Magnetic Materials”, IEEE Transactions on Magnetics, vol. 37, No. 4, pp. 2275-2277, Jul. 4, 2001.
J.P. Wang et al., “Preparation and Magnetic Properties of Fe100-xNix-SiO2 Granular Alloy Solid Using a Sol-Gel Method”, Journal of Magnetism and Magnetic Materials, 135, pp. L251-L256, 1994.
D.E. Nikles, et al., “Protection of Fe Pigments with Amine-Quinone Polymers”, IEEE Transactions of Magnetics, vol. 30, No. 6, pp. 4068-4070, Nov. 1994.
M.L. Lau, et al., “Synthesis of Nanocrystalline M50 Steel Powders by Cryomilling”, NanoStructured Materials vol. 7, 847-856, 1996.
J.P. Partridge and P.R. Strutt, “Laser-Assisted Chemical and Morphological Modification of Metallic Substrates,” SPIE 669 Laser Applications in Chemistry, 150-160, 1986.
T.D. Xiao, Y.D. Zhang, P.R. Strutt, J.I. Budnick, K. Mohan, and K.E. Gonsalves, “Synthesis of FexN/BN Magnetic Nanocomposite Via Chemical Processing,” NanoStructured Materials, vol. 2, 285-294, 1993.
J. Smit and H.P.J. Wijn, Ferrites, (Philips', Holland, 1959).
P.R. Strutt, K.E. Gonsalves and T.D. Xiao, “Synthesis of Polymerized Preceramic Nanoparticle Powders by Laser Irradiation of Metallorganic Precursors,” NanoStructued Materials, vol. 1, 21-25, 1992.
T.D. Xiao, S. Torban, P.R. Strutt and P.G. Klemens, “Synthesis of Si(N,C) Nanostructued Powders from an Organometallic Aerosol Using a Hot-Wall Reactor,” Journal of Material Science 28, 1334-1340, 1993.
T.D. Xiao, S. Torban, P.R. Strutt and B. H. Kear, “Synthesis of Nanostructured Ni/Cr and Ni-Cr3C2 Powders by an Organic Solution Reaction Method,” NanoStructured Materials, vol. 7, pp. 857-871, 1996.
T. D. Xiao, K.E. Gonsalves and P.R. Strutt, “Synthesis of Aluminum Nitride/Boron Nitride Composite Materials,” J. Am. Ceram. Soc. 76, 987-92, 1993.
P. Luo, P.R. Strutt and T.D. Xiao, “Synthesis of Chromium Silicide-Silicon Carbide Composite Powder,” Materials Science and Engineering, B17, 126-130, 1993.
T.D. Xiao, Bokhimi, M. Benaissa, R. Perez, P.R. Strutt and M. JoséYacamán, “Microstructural Characteristics of Chemically Processed Manganese Oxide Nanofibres,” Acta Mater. vol. 45, 1685-1693, 1997.
G.C. Hadjipanayis and G.A. Prinz, Science and Technology of Nanostructured Magnetic Materials, (Plenum Press, New York, 1991).
Y. Hayakawa, A. Makino, H. Fujimori and A. Inoue, “High resistive nanocrystalline Fe-M-O (M=Hf, Zr, rare-earth metals) soft magnetic films for high-frequency applications”, J. Appl. Phys. 81, 3747-3752, 1997.
R.D. Shull, et al., Nanocomposite Magnetic Materials, Proc. 6th Int. Cryocooler Conf. (Eds: G. Green, M. Knox), David Taylor Research Center Publication #DTRC-91/002, Annapolis, MD 1991.
A.K. Giri, C. de Julian, and J. M. Gonzalez, “Coercivity of Fe-SiO2 Nanocomposite Materials Prepared by Ball Milling”, J. Appl. Phys. 76, 6573-6575, 1994.
A. Goldman, Handbook of Modern Ferromagnetic Materials, (Kluwer Academic Publisher, Boston, 1999).
K.H. Kim, Y.H. Kim, J. Kim, S.H. Han, and H.J. Kim, “The Magnetic Properties of Nanocrystalline Fe-Co(Cr)-Hf-N thin films”, Journal of Applied Physics, vol. 87, 5248-5250, 2000.
W.D. Jones, Fundamental Principles of Powder Metallurgy, p. 659, (E. Arnold, London, 1960).
G. Herzer, Soft Magnetic Nanocrystalline Materials, Scripta Metallurgica et Materialia, vol. 33, 1741-1756, 1995.
D.L. Leslie-Pelecky, and R.D. Rieke, Magnetic Properties of Nanostructured Materials, Chem. Mater. 8, 1770-1783, 1996.
G. T. Rado, On the Inertia of Oscillating Ferromagnetic Domain Walls, Physical Review, vol. 83, pp. 821-826. 1951.
G.T. Rado, “Magnetic Spectra of Ferrites”, Reviews of Modern Physics, vol. 25, pp. 81-89, 1953.
H. Fujimori, Structure and 100 MHz Soft Magnetic Properties in Multilayers and Granular Thin Films, Scripta Metallurgica et Materialia, vol. 33, 1625-1636, 1995.
A. Chatterjee et al., Glass-Metal Nanocomposite Synthesis by Metal Organic Route, J. Phys. D: Appl. Phys. 22, 1386-1392, 1989.
D. N. Lambeth, et al., “Media for 10Gb/in2 Hard Disk Storage, Issues and Status”, J. Appl. Phys. 79, 4496-4501, 1996.
C. Djega-Mariadassou, et al., “High Field Magnetic Study of Small Fe Particles Dispersed in an Alumina Matrix”, IEEE Transactions on Magnetics, vol. 26, No. 5, pp. 1819-1821, Sep. 1990.
M. Pardavi-Horvath, et al., “Switching Field Distribution Changes During Reactions-Milling of Iron-Zinc Nanocomposites”, IEEE Transactions on Magnetics, vol. 31, No. 6, pp. 3775-3777, Nov. 1995.
C. Laurent, et al., “Magnetic Properties of Granular Co-Polymer Thin Films”, Journal of Applied Physics, 65 (5), pp. 2017-2020, Mar. 1, 1989.
G.A. Niklasson, et al., “Optical Properties and Solar Selectivity of Coevaporated Co-Al2O3 Composite Films”, Journal of Applied Physics, 55 (9), pp. 3382-3410, May 1, 1984.
A. Gavrin, et al., “Fabrication and Magnetic Properties of Granular Alloys”, Journal of Applied Physics, 67 (2), pp. 938-942, Jan. 15, 1990.
E. Paparazzo, et al., “X-ray Photoemission Study of Fe-Al2O3 Granular Thin Films”, Rapid Communications Physical Review B, vol. 28, No. 2, pp. 1154-1157, Jul. 15, 1983.
J.I. Gittleman, et al., “Magnetic Properties of Granular Nickel Films”, Physical Review B, vol. 5, No. 9, pp. 3609-3621, May 1, 1972.
J.I. Gittleman, et al., “Superparamagnetism and Relaxation Effects in Granular Ni-SiO2 and Ni-Al2O3 Films”, Physical Review B, vol. 9, No. 9, pp. 3891-3897, May 1, 1974.
M. Pardavi-Horvath, et al., “Magnetic Properties of Copper-Magnetite Nanocomposites Prepared by Ball Milling”, Journal of Applied Physics, 73 (10), pp. 6958-6960, May 15, 1993.

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