Coating apparatus – With means to centrifuge work
Patent
1989-08-18
1993-04-06
Bell, Janyce
Coating apparatus
With means to centrifuge work
118 50, B05C 1102
Patent
active
051999889
ABSTRACT:
An apparatus for producing an optical data recording medium comprising a turn table adapted to support a substrate of the recording medium and a nozzle for dropping a coating liquid onto the substrate, the coating liquid dropped on the substrate being spread over the substrate by a rotational force of the turn table to form a coating layer, the apparatus being provided with a gas flow suppressing type housing which is partitioned off from the atmosphere so as to suppress the convection current flowing, due to the rotation of the turn table, toward a central portion of the substrate and further toward the outer circumferential portion thereof along a top surface of the substrate and to suppress the evaporation of a solvent of the coating liquid into the atmosphere, the nozzle being arranged above the inner circumferential portion of the substrate with its end portion being directed to the outer circumferential portion of the substrate, the end portion of the nozzle being inclined so as to form an angle less than 90 degrees relative to the substrate as viewed from a side of the substrate, the coating liquid application being carried out in a hermetically sealed atmosphere within a sealed chamber.
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Kamezaki Hisamitsu
Saito Osamu
Tsuburaya Yoshitane
Bell Janyce
Hitachi Maxell Ltd.
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