Do nanocoatings really extend stencil underwipe intervals? As part of a larger stencil study we were performing for SMTAI, we decided to include a quick test. We'd take two of our nanocoated fine grain stencils and run one print per wipe vs. 10 prints per wipe on a really complex test vehicle. The Process of Record (POR) for this PCB is a vac-dry-vac wipe after every print, based on prior experimentation before the nanocoating was introduced to the process. We were almost certain that a tenfold extension of wipe intervals would show a definite decline in print quality, regardless of the coating's influence.
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