Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1987-07-13
1989-05-23
Thibodeau, Paul J.
Stock material or miscellaneous articles
Composite
Of inorganic material
365122, 369 13, 369288, 428900, G11B 724
Patent
active
048330434
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 X) 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.
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Kirn Walter N.
Little Douglas B.
Minnesota Mining and Manufacturing Company
Sell Donald M.
Thibodeau Paul J.
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