The 'Missing' Conformal Coating

摘要

This month we feature an issue recently submitted to the database. It purports to be missing conformal coating, but is it?rnActually, this is a satisfactory board assembly after coating. This board assembly has a Parylene coating, which is around 15 μm in thickness on all surfaces of the board and components. Based on the process, coverage and thickness is virtually guaranteed. It is difficult to see the coating due to the process and the type of material used, so it's not a defect.