Apparatus for spin coating in the production of thin magnetic la

Details Apparatus for spin coating in the production of thin magnetic la Apparatus for spin coating in the production of thin magnetic la

1978-09-27

1980-05-06

Pitlick, Harris A.

Coating apparatus

With means to centrifuge work

118 56, 118320, B05C 1108

Patent

active

042011493

ABSTRACT:
The invention relates to an improved apparatus for the manufacture of magnetic discs carrying very thin magnetic layers, by applying a fluid dispersion of magnetic materials in a binder mixture to rigid base discs by the spin-coating process. Above the side of the base disc which is to be provided with the magnetic layer, there are arranged means which produce an aerodynamic boundary layer above the discs during rotation of the latter. This avoids the formation of surface irregularities and of coating streaks during production of the layer by spin-coating.

REFERENCES:
patent: 2632725 (1953-03-01), Marks et al.
patent: 3323491 (1967-06-01), Granick
patent: 3760822 (1973-09-01), Evans
patent: 3870014 (1975-03-01), Buck
patent: 4031852 (1977-06-01), Clarke et al.
patent: 4033288 (1977-07-01), Woellhaf et al.
patent: 4068019 (1978-01-01), Boeckl
patent: 4073262 (1978-02-01), Scheffel et al.
patent: 4096295 (1978-06-01), Marks
IBM Techn. Discl. Bulletin, vol. 14, No. 6, Nov. 1971, p. 1908.

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