Electronics Forum | Sun Sep 26 11:54:06 EDT 1999 | Earl Moon
| i had a problem here, during the wave soldering process, we apply a water soluble mask on the gold finger to protect it from contamination. But after washing, there is still some mask left on the gold finger. | Can anyone pls advise is there any pa
Electronics Forum | Tue Dec 09 10:04:36 EST 2008 | lazzara55
SMT-ypw: Does PWB supplier start to implement PWB drying packaging? B3: YES! The fabrication of the PCB involves a series of wet processing that requires counter-measures to remove moisure. While some of the PCB processes also include bake cycles th
Electronics Forum | Fri Jan 25 13:07:31 EST 2013 | johng
Thank you for replying Phil. We use water only wash at 130°F and at 4 ft/min (about 2 min). They are mostly dried by the hot ait knife and left to air dry until next day. The operators do not wear gloves. When I run a bare board through the same pro
Electronics Forum | Wed Jan 05 18:25:29 EST 2022 | cyber_wolf
Its kind of nice to be able to put a dirty stencil in the cleaner and get a dry clean one out. That pretty much points to the spray units with a dry cycle. Things to consider, chemistry consumption, how your stencils are bound, maintenance,and of c
Electronics Forum | Tue Mar 30 07:34:46 EST 2004 | TONY
We are running double side micro bga boards and we were told to run one side, wash them, put them in the oven at 125c for 1 hour and putting them in the dry cabinet until we run the other side. Is this necessary? It is time consuming for us to wait
Electronics Forum | Thu May 24 22:46:10 EDT 2007 | colormaker
The waste water is filtered then sent to city sewer. When we first started we had inspections and then they said our volume was so low and did not require continued testing. We wash 20-40 boards a month. Small 3x4 inch boards. If we hand rinse the b
Electronics Forum | Thu Jul 21 14:54:32 EDT 2016 | ttheis
Acetone is flammable and hazardous to deal with. The fewer fire hazards and nasty fumes the better in my opinion. I would either go with a alcohol based no-clean for economical processesing and boards that can't be washed, or water washable if you ca
Electronics Forum | Thu Jun 11 09:39:03 EDT 1998 | Sherry
| | | | | We use them, but we never thought about them. | | | WHAT ARE THEY? The hand lotion we provide for our operators. | | | BACKGROUND: Operators hands take a beating. They | | | 1 Work in a humidity controlled 35 to 50%RH environment that
Electronics Forum | Wed Aug 17 13:57:27 EDT 2005 | ppwlee
We have encountered what appears to be mask discoloration after wave soldering. The areas of concern coincide with the areas that were exposed selectively by fixtures during wave soldering, dominated by one date code of PCB with a slightly different
Electronics Forum | Wed Jan 18 12:10:33 EST 2006 | Fred Calkins
Since this happens just after PM and you mentioned solvent in an earlier post, I suspect that the solvent is washing a light grease film from the turret shaft area into the bore that the nozzle fits in. I think that the nozzle shank and bore must be
