Overgrowth Phenomenon: Poor DFR Adhesion -> Review DFR process. Pre-treatment error -> Adjust pre-treatment conditions. If DFR adhesion is poor or pre-treatment is too strong, overgrowth (bulging) of DFR occurs, causing detachment of the plated area. Thick film layer -> Change current settings. If the film layer is too thick, overgrowth beyond the DFR boundary occurs. Poor adjustment of shieldin..

Void Defect: Weak agitation -> Review spray pump settings / Nozzle cleaning / Filter replacement. Weak agitation accelerates detachment near the hole's opening, making voids more likely to form. If the nozzle and filter inlet are blocked, agitation weakens, leading to void formation. High current density -> Reduce current density. High current density accelerates detachment near the hole's openi..