A Yardstick for Measuring Uniform Coating Thickness

摘要

A constant, process-typical relative standard deviation can be assumed for coating processes. Meeting specification limits can be verified easily by using two simple nomograms as explained in this paper. The expenditures for reducing the process variations are often underestimated. As a rule, however, this expenditure will be worthwhile because as experience shows, the often extremely high consequential costs of the process variations are reduced. Before signing contracts, suppliers and customers should be clean about what is technically possible and should-also be clear that obtaining objective production results through, measurement is not only possible but also necessary.