Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1986-06-13
1988-01-26
Lesmes, George F.
Stock material or miscellaneous articles
Composite
Of inorganic material
428702, 428900, 428928, G11B 724
Patent
active
047216581
ABSTRACT:
A magneto optical thin film recording medium is disclosed having very high carrier-to-noise ratios and high rotation angles. A transmission electron microscope photomicrograph (at 200,000.times.) of one such medium is shown in FIG. 1. These are multi-phase amorphous materials having magnetic anisotropy perpendicular to the plane of the thin film. They are produced in a triode vacuum sputtering process at vacuums in the range of 4.times.10.sup.-3 to 6.times.10.sup.-4 Torr. By adjusting process parameters such as substrate temperature, anode bias and deposition rate, the properties of the thin film can be altered.
REFERENCES:
patent: 3427154 (1969-02-01), Mader et al.
patent: 3472575 (1969-10-01), Hunt
patent: 3514766 (1970-05-01), Mee et al.
patent: 3530441 (1970-09-01), Ovshinsky
patent: 3650601 (1972-03-01), Bierlein
patent: 3651281 (1972-03-01), Becker
patent: 3696352 (1972-10-01), Schilling
patent: 3838450 (1974-09-01), Bongers et al.
patent: 3949387 (1976-04-01), Chaudhari et al.
patent: 3965463 (1976-06-01), Chaudhari et al.
patent: 4042341 (1977-08-01), Smeggil
patent: 4310899 (1982-01-01), Biesterbos et al.
patent: 4347112 (1982-08-01), Togami
patent: 4367257 (1983-01-01), Arai et al.
patent: 4414650 (1983-11-01), Ohta et al.
patent: 4438508 (1984-03-01), Urner-Willie et al.
patent: 4497870 (1985-02-01), Kudo et al.
patent: 4569881 (1986-02-01), Freese et al.
Takenouchi, A. et al., "Magneto-Optical Characteristics of Double-Layered Amorphous RE-Fe Films by RF Sputtering", J. Appl. Phys., Mar. 1984, pp. 2164-2166.
Sakurai, Y. et al., "RE-TM Amorphous Films for Magneto-Optical Recording", IEEE Transactions on Magnetics, Sep. 1983, pp. 1734-1736.
Kowalski, D. C., "High Data Rate Erasable Magneto-Optic Media Tester", Xerox Palo Alto Research Center.
Katayama, H. et al., "Study of High Reliability of the Magneto-Optic Medium with the Multi-Layer Structure", Sharp Corp., Nov., 1983.
Takahashi, A. "Magneto-Optic Properties of GdTbFe Thim Films", Sharp Corporation, Nov., 1983.
Nomura, T., "Recent Trends in Magneto Optic Disk", Technocrat, Mar., 1983.
O.sub.2 Contaminated Amorphous Fe Gd Films, J. Schneider et al., J. App. Phys., 49(3), Mar., 1978, p. 1747.
Mansuripur, M., et al., "Optimum Disk Structures and Energetics of Domain Formation in Magneto Optical Recording", IEEE Transaction on Magnetics, Nov., 1982.
Togami, Y., et al., "Amorphous Thin Film Disk for Magneto Optical Memory", SPIE Optical Disk Technology, 1982.
Honda, S., et al., "Dynamic Behavior of Small Bits Written by Laser Irradiation on GdFe Films", J. Appl. Phys., Mar., 1981.
Mimura, Y., et al., "Thermomagnetic Writing on GdFe and GdFe-Y Amorphous Films", Japanese Journal of Applied Physics, Aug., 1978.
Imamura, N., "Research Applies Magnetic Thin Films and the Magneto-Optical Effect in Storage Devices", Journal of Electronic Engineering, pp. 100-103, Mar., 1983.
Imamura, N., "The Development of Magneto-Optical Disk Memory with Semiconductor Lasers", KDD Research Development Laboratory, Jan. 17-20, 1983.
Bell., A. E., "Optical Data Storage", Laser Focus, Jan., 1983.
Ohta, K., et al., "Magneto-optical Disk with a Reflecting Layer", Optical Data Storage Conference at Incline Village, Nevada, Jan. 17-20, 1983.
Allen, R. and Connell, G. A. N., "Magneto-Optical Properties of Amorphous Terbium-Iron", J. Appl. Phys., Mar. 1982, pp. 2353-2355.
Togami, Y., et al., "Amorphous GdCo Disk for Thermomagnetic Recording", J. Appl. Phys., Mar., 1982, pp. 2335-2337.
Chen, Tu, et al., "Thickness Dependence of Magneto-Optical Effects in Tb-Te Film", Optical Storage Date Conference at Incline Village, Nev., Jan. 17-20, 1983.
Mansuripur, M., et al., "Signal-to-Noise in Magneto-Optic Storage", SPIE vol. 329, Optical Disk Technology, 1982, pp. 215-222.
Connell, G. A. N., "Interference Enhanced Kerr Spectroscopy for Very Thin Absorbing Films", Applied Physics Letter, Feb., 1982.
Gambino, R. J. and Cuomo, J. J., "Selective Resputtering-Induced Anisotropy in Amorphous Films", J. Vac. Sci. Technol., Mar./Apr., 1978, pp. 296-301.
Structure of Argon Sputtered Gd-Co and Gd-Co-Mo Amorphous Thin Films", J. Graczyk, J. App. Phys., 49(3), Mar., 1978, p. 1738.
Atkinson William M.
Lesmes George F.
Little Douglas B.
Minnesota Mining and Manufacturing Company
Sell Donald M.
LandOfFree
Amorphous magneto optical recording medium does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Amorphous magneto optical recording medium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Amorphous magneto optical recording medium will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1467773