Electronics Forum | Wed Jun 24 14:20:53 EDT 1998 | Ben Salisbury
I know this topic has probably been talked about before...But I ran into a small situation where Solder Balls were appearing in large quantities on the PCB....the Problem has been isolated and taken care of, my question is, what are some good methods
Electronics Forum | Thu Oct 03 04:04:10 EDT 2002 | Bob Willis
SMTNet has a video tape and interactive CD ROM on Intrusive Reflow Soldering that you may want to check out. In addition there are some free inspection standards for pin in hole printing, placement and soldering available at http://www.dpmo-monitori
Electronics Forum | Wed Dec 18 08:19:00 EST 2002 | cyber_wolf
One thing that will also cause this is very slight stencil mis-alignment. Sometimes the paste will have a tendency to hang up in the apertures if you are over hanging just a little on the solder mask. Some solder mask are very slick and will not pull
Electronics Forum | Wed May 25 17:29:58 EDT 2005 | Peter
We are evaluating a low halide Water soldering flux (Aim WS716). Has anyone had good/bad experience with it? Our operator has mentioned strong and irrating smell, even when standing a foot away from the conveyor entry/exit. The fluxer is embedded w
Electronics Forum | Thu Aug 25 08:26:48 EDT 2005 | DannyJ
Hi MM, Off the cuff, is it possible that the QFP leads were not coated? I'm by no means an expert in QFP manufacturing, but I do believe that there is a coating which enables solderability that is added to the leads somewhere in the process. I ha
Electronics Forum | Tue Nov 21 12:22:26 EST 2006 | billwestiet
I work for a company importing Wave Solder Machines from China, and I continue to be amazed at how many new importers I run into. Many of which have not sold more than one or two machines. I'm looking to try to come up with a list. Who do you know
Electronics Forum | Tue Nov 06 07:16:36 EST 2007 | hussman
Run a board with regular solder paste and put your worries to rest. Total cost about $0.50 American. Total Time about 3 minutes placement - 6 minutes oven. Looks like it might be worth a cup of coffe and 9 minutes of your time to try.
Electronics Forum | Tue Aug 17 11:24:04 EDT 2010 | namruht
I have a question that has been discussed many times, but is always good to get some new insight. We have lots of issues with our no clean process. We use a Kester EP256 solder paste. I would just like to get some general tips on how to get rid of mi
Electronics Forum | Mon Aug 10 12:58:04 EDT 2020 | SMTA-64386637
We have found Acrylic CC under QFNs is a failure mechanism in thermal cycling. The coating acts as a wedge and causes solder joint cracks. We do not coat QFNs. To enhance reliability we have the vias plugged with solder mask. This eliminates some
Electronics Forum | Tue Jan 08 14:54:10 EST 2002 | Yannick
Hi, I experience some trouble with my solder joint recently. And I'm wondering if someone could help me with this. First I use a thermocouple wich I must tape to the board to profile my temperature. I want to buy the Temprobe from Saunder Tech
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