Method of smoothing magnetic film

Details Method of smoothing magnetic film Method of smoothing magnetic film

1988-06-27

1990-03-27

Pianalto, Bernard

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

427128, 427130, H01F 1002

Patent

active

049119508

ABSTRACT:
This invention provides a method of smoothing a magnetic film comprising the steps of: coating a magnetic paint over the surface of a web to form a film thereon; and moving the web in an alternating current magnetic field before the film thereon being dried so that smoothing of the film may be effected. This method causes fluctuation of the magnetic particulates contained in the paint so as to uniformly reduce the viscosity of the film, thereby preventing the formation of a high-viscosity layer on the film surface. Accordingly, the surface of the film can be easily smoothed by means of either an air doctor or a flexible sheet.

REFERENCES:
patent: 3001891 (1961-09-01), Stoller
patent: 3256112 (1966-06-01), Camras
patent: 3518109 (1970-06-01), Halley
patent: 3928657 (1975-12-01), Armstrong
patent: 4336278 (1982-06-01), Pertzsch et al.
patent: 4547393 (1985-10-01), Asai et al.

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