Method of manufacturing a magnetic recording film of a thin meta

Details Method of manufacturing a magnetic recording film of a thin meta Method of manufacturing a magnetic recording film of a thin meta

1983-07-25

1984-05-01

Pianalto, Bernard D.

Coating processes

Magnetic base or coating

Magnetic coating

427132, 427172, 4273743, 427380, 4273831, 427177, H01F 1002

Patent

active

044461704

ABSTRACT:
A method of manufacturing a magnetic recording film of a thin metallic film type comprises a step of forming a magnetic layer in the form of a thin metallic film on a base film, while providing a predetermined level of tension in the base film; a thermal treatment step of heating the film with the magnetic layer to a first temperature level, at which thermal shrinkage of the base film is caused, while providing the predetermined tension in the film; and, then, cooling the film, thereby removing any curls and wrinkles found therein; and an additional thermal treatment step of heating the thermally treated film to a second temperature level, which is lower than the first temperature level, and cooling the film, thereby removing thermal stress in the magnetic layer.

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