Electronics Forum: after (Page 71 of 656)

Flux residues found after assembly process (Clean process)

Electronics Forum | Wed Jan 13 12:17:47 EST 2016 | trampacorp

Thanks for your input Michael. Basically the > boards had been go through from washing and even > ionic contamination already. In order to > eliminate or detect the flux residues, is there > any equipment something like a uv lamp that can > dete

ENIG (thru hole ring turns black after wave soldering)

Electronics Forum | Tue Aug 02 15:02:50 EDT 2016 | davef

ASPIS (Advanced Surface Protection for Improved Reliability PCB Systems) The three year Aspis ‘Research for SMEs’ project has been conducted to address problems found with the nickel gold (ENIG) solderable finishes that are used by the electronics in

Pin Hole Issue after Reflow Soldering - Passive Components

Electronics Forum | Thu Dec 28 16:20:12 EST 2017 | rgduval

Pictures of your issues would help us to help you. Pin holes/blow holes are generally caused by either moisture or flux volatiles/organics. Since you've virtually eliminated moisture, it might be time to look at your paste/flux. You can call eithe

Pin Hole Issue after Reflow Soldering - Passive Components

Electronics Forum | Wed Feb 14 12:37:20 EST 2018 | horchak

Ameen Now I'm feeling sorry for you. If all the other components on the assembly have good solderability you have already proven the component is the problem. I spent 27 years in contract manufacturing and been in this situation many times. If your c

Samtec Searay 500 pin connector solder wicking issue after reflow

Electronics Forum | Tue Jan 14 11:53:44 EST 2020 | avillaro2020

Hi Phil, thanks. I am successful using the same connector on small thinner boards 2-2.5kg) i cant make it work, tried all kinds of profiles with vapour phase but to no avail. Yes you read it right 4.3-6.3mm pcb thickness and 2-2.5Kg. And it is 44 lay

Samtec Searay 500 pin connector solder wicking issue after reflow

Electronics Forum | Wed Jan 15 11:18:51 EST 2020 | avillaro2020

Hi Evtimov, Thanks again! The solder wicking/open solder joint is not actually gross rejection, it is only a few and appeared random (difficult to trend the location of the opens), what is perflexing is that i have this 1 or 2 open solder joints sur

Samtec Searay 500 pin connector solder wicking issue after reflow

Electronics Forum | Wed Jan 15 11:53:40 EST 2020 | avillaro2020

As far as the large thermal gradient I have on my thick and thermal heavy board, I've done quite a bit to minimize the gradient but not successful. it's like one pad is connected to a signal while the other pad is connected to ground, you can't bring

What pressure is recommended to clean AMT boards after reflow

Electronics Forum | Fri Sep 07 15:19:42 EDT 2001 | davef

Watt tiepoo? [Cereally, you can usually fix typos after you post by using the P yellow �edit� button that shows when you are looking at your posting.] We�re had people on SMTnet that were washing their boards with a brush attached to the end of a ga

Re: reject percentage of assembled circuits after initial test?

Electronics Forum | Mon Jan 11 18:07:55 EST 1999 | Lech Bartnik

This is a question for those of you who actually assemble components onto a board. Any idea what the "industry standard" is for fall out on assembled PCB's? I realize that the controls put in place in your processes will effect your ove

Re: Small balls on boards after wave soldering.

Electronics Forum | Thu Apr 16 13:40:08 EDT 1998 | Chrys

Is there anybody to help me ? We have small balls appearing on the boards soldered by wave soldering machine and it looks that use of nitrogen is linked to the problem (because without nitrogen, we have no more problems). That remind you


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