Manufacturing method for a magnetic recording medium

Details Manufacturing method for a magnetic recording medium Manufacturing method for a magnetic recording medium

1986-10-02

1987-12-15

Pianalto, Bernard D.

Coating processes

Magnetic base or coating

Magnetic coating

427128, 427131, 427132, 427251, 427295, 427296, 427299, 427316, 427319, H01F 1002

Patent

active

047132620

ABSTRACT:
A method for manufacturing a magnetic recording medium, comprising evaporating a magnetic metal material from an evaporation source to form a vapor stream of the magnetic metal material, vapor-depositing the magnetic metal material on a tape-shaped substrate moving along a cooling can such that the incident angle (.theta.) of the vapor stream which is incident upon the substrate changes continuously from a high incident angle (.theta.max) to a low incident angle (.theta.min), and at the same time introducing one or more gases selected from the group consisting of a rare gas, CO.sub.2 gas, N.sub.2 gas, and nitrogen oxide gas, or a mixed gas composed of oxygen gas and one or more gases selected from the group consisting of a rare gas, CO.sub.2 gas, N.sub.2 gas and nitrogen oxide gas from a gas inlet part disposed at a position in the vicinity of the substrate and near the vapor stream at a low incident angle (.theta.min) upon the substrate, thereby providing a ferromagnetic metal film on the substrate.

REFERENCES:
patent: 4450186 (1984-05-01), Shinohara

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