Method of manufacturing magnetic recording medium

Details Method of manufacturing magnetic recording medium Method of manufacturing magnetic recording medium

1981-05-19

1983-07-26

Pianalto, Bernard D.

Coating processes

Magnetic base or coating

Magnetic coating

427128, 427251, 427296, 427300, H01F 1002

Patent

active

043954391

ABSTRACT:
A method and apparatus for manufacturing a magnetic recording medium using vacuum-deposition from an evaporated metal source having a very high efficiency and uniform deposition. The support onto which the magnetic film is to be evaporated is guided and conveyed along a curved path above a molten metal evaporating source at a substantially constant speed. The curved path is shaped such that evaporated metal flow lines connecting a central point on the evaporation surface of the molten metal in the evaporating source to corresponding intersection points on the support form the same angle of incidence with respect to the longitudinal direction of the support for all positions along the support where the film is to be deposited. Endless belt structures including guide rollers and magnets are used to form rising and falling paths for conveying the support along the desired curved path.

REFERENCES:
patent: 4220117 (1980-09-01), Shinohara

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