Method of curtain coating to make thin dielectric ceramic layers
US4716058A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 25, 1986 |
| Grant date | Dec 29, 1987 |
| Priority date | — |
| Expiry date | Aug 25, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S118/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.