Method of curtain coating to make thin dielectric ceramic layers

Details Method of curtain coating to make thin dielectric ceramic layers Method of curtain coating to make thin dielectric ceramic layers

1986-08-25

1987-12-29

Beck, Shrive P.

Coating processes

Falling curtain of coating material utilized

427 9, 427 10, 118688, 118324, 118DIG4, B05D 130

Patent

active

047160586

ABSTRACT:
The dielectric layer or layers in a ceramic capacitor having at least one buried electrode is deposited by a curtain coating process that includes obtaining a measure of the ceramic-paint-curtain thickness. A source of electromagnetic radiation, e.g. in the infrared range, is directed equally near the left and right edges of the curtain, and detectors at the opposite curtain surface side pick up the difference in the radiation transmissivity which is a measure of curtain thickness assymetry left to right. By adjusting the paint reservoir from which the curtain issues to make the difference zero and the curtain symmetrical, uniformity in paint coating thickness is achieved.

REFERENCES:
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patent: 2884531 (1959-04-01), Bosch
patent: 3212127 (1965-10-01), Flook et al.
patent: 3599288 (1971-08-01), Eakman
patent: 3717487 (1973-02-01), Hurley et al.
patent: 4060649 (1977-11-01), Coleman
patent: 4342423 (1982-08-01), Coleman
patent: 4510175 (1985-04-01), Burn

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