What are application pathways you can deduce from RMS roughness value like using film as hydrophobic surface, in coatings or other platforms in electronic devices etc. Please suggest me the suitable roughness value ranges for different applications.
My background is in thin film materials for electronic applications, specifically as the dielectric material in thin film capacitors. For this application, we needed the RMS roughness value to be as low as possible, typically below 10-20nm if possible. A low roughness in the case of our thin films ensured that good electrical contact could be obtained between the dielectric film and the metallic electrodes. However, in other applications, I think the tolerance for surface roughness is larger, ie: above 20nm RMS roughness may be acceptable in certain applications.
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