INSPECTION METHODS FOR PECVD COATINGS
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United States of America Patent
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May 9, 2013
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May 9, 2012
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Abstract
A method for inspecting the product of a coating process is provided. In certain embodiments, the release of at least one volatile species from the coated surface into the gas space adjacent to the coated surface is measured and the result is compared with the result for at least one reference object measured under the same test conditions. Microbalance weighing methods are also disclosed to detect and distinguish among PECVD coatings. Thus the presence or absence of the coating, and/or a physical and/or chemical property of the coating can be determined. The method is useful for inspecting any coated articles, e.g. vessels. Its application on the inspection of PECVD coatings made from organosilicon precursors, especially of barrier coatings, is also disclosed.
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