Method of curtain coating to make thin dielectric ceramic layers
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United States of America Patent
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-
Dec 29, 1987
Grant Date -
N/A
app pub date -
Aug 25, 1986
filing date -
Aug 25, 1986
priority date (Note) -
Expired
status (Latency Note)
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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.
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