Electronics Forum | Sun Jun 10 23:49:17 EDT 2001 | Robert Sykoh
No-clean is definitely a cheaper process. It will eliminte cleaning. Some issues associated with no-clean are: -- the flux stain left behind on the PCB will create a cosmetic issue. You may want to seek advice from your customers. -- next, the flux
Electronics Forum | Wed Feb 13 05:56:55 EST 2008 | johnlee9210
Our front panels (where the controls show) for our assembled amplifiers are anodized and we make sure that it is free from oils or other stains prior packing the whole assembled unit. We just use damp cloth in cleaning and sometimes flux remover for
Electronics Forum | Fri Apr 16 13:22:48 EDT 2010 | stepheniii
Have you tried running a few bare boards through the oven? If there is no flux on them and you still get the "stains" then I think you can eliminate the flux as the cuprit. And I've been told that white is the second most difficult solder mask colou
Electronics Forum | Mon Jun 06 12:51:17 EDT 2016 | wlsmt
My operator applied flux gel ALPHA WS-609 on MG P/N FTH101XAP (CAP ALUM 100UF 50V 20% SMD) before aqueous washing the PCBAs. Solder paste used was ALPHA WS-820. Now the caps have yellow stains. Any solution to this is appreciated. Tks
Electronics Forum | Wed Jul 05 20:54:17 EDT 2000 | Dave F
Hi Patrick: Mike is correct. Taking it a little differently ... The approach you take is dependent on: 1 Type of gold finish 2 Source of the staining. Since you�re talking gold fingers, this is probably hard gold. So, � * If it�s a water or an o
Electronics Forum | Tue Jan 26 09:33:24 EST 2010 | smt_guy
Hi, I have a copper plate that we received from supplier with oils and some sort of stains. We tried most of the general type of degreasers by soaking but didn't work until we tried a Floor Stripper from Ace and it does make the copper clean and shi
Electronics Forum | Fri Apr 16 14:01:48 EDT 2010 | richardli
It could be the flux condensed in the oven. We plan to clean the vent and filter next week. Then we see if help. I just want to see if anybody has same problem in experience. Soldermask supplier told us the same white soldermask always change to a l
Electronics Forum | Wed Sep 26 12:16:44 EDT 2012 | bwjm
Hi Guys,recently i am facing an issue. Refer to the attached photo. This PCB is high RF speed, gold immersion single layer. After reflow, my solder seems to have black stains on it. I tried with SAC305 paste water soluble and no-clean, both results a
Electronics Forum | Tue Jun 07 12:07:30 EDT 2016 | wlsmt
Sorry davef. I was not being clear. PCBAs came out cold soldered after being reflowed the first time with ALPHA WS-820. The flux gel ALPHA WS 609 was supposed to be applied only onto the terminations of caps where ALPHA WS-820 was for a second refl
Electronics Forum | Fri Feb 23 12:24:59 EST 2001 | traviss
200-300u that�s tinny but I read IPC as saying ANY metal other than gold in the critical contact areas is not acceptable.
