Sunnygirl88
Nailhead weakness and to deviation(drill a hole and electroplate behind) Manufacturing process elucidation Drill a hole quality to really recognize\\ Work contents Generally after drilling a hole,the position had to confirm to drill a hole is fitting,do not leak to drill,drill to be partial to,the bore breaks or the inner part tear to pieces of weakness.So the industry often uses of check equipments,see through to equip check machine only for the X,drill a hole circuit board position to do sampling to check with this,by drilling a hole by confirmation of district have no exceed the scope limited by copper mat.Then have to confirm and don't lead to tear to pieces phenomenon stuffily at quality aspect inside the bore,the phenomenon there been copper scraps and resin to tear to pieces,then will present so-called"nailhead type weakness" after electroplating,leading the big nailhead will become the problem of[with] quality trust of the circuit board of future,so most products will grow weakness to make a specification definition to the time.
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