1 wave solder machine not filling the holes result

Same wave process do not apply to all finish board

Electronics Forum | Fri Oct 14 09:58:13 EDT 2005 | patrickbruneel

Here's what I believe is happening. The main difference between the HASL boards and the gold plated boards is that HASL boards are pre-soldered. HASL boards need very little flux activity to get good hole fill and the machine settings have a wide pro