Electronics Forum | Fri Sep 12 22:57:13 EDT 2003 | Dean
What is the surface finish of the PCB? Tin? Imersion Silver? What flux is used in wave solder and / or SMT? I have much experience with silver migration and tin wiskers. Both can disappear during a reqork cycle. Both can be extremely difficult
Electronics Forum | Fri Dec 19 08:47:47 EST 2003 | browning
I recently found a company that will take the Gerber data and create full Documentation and machine programs from Gerber. The cost is extremely reasonable, so much so, that I have been having them do all of our work. I cannot even do the work myself
Electronics Forum | Fri Jul 16 15:01:31 EDT 2004 | waveroom
I cant wait to hear the replies. We are an Ersascope dealer. Have sold over 25 systems. Have looked at all the competitors and Fortunately in our minds, Ersa still offers the best system. Not the least expensive, but the best. I found that ease of
Electronics Forum | Tue Jul 27 11:34:05 EDT 2004 | C Lampron
Nippy, This is exactly what we are seeing. The exessive pads are all on one side of the board. This is a 10 up panel 5x2. All of the QFP's on one side on the panel are not releasing or are not gasketing and causing bridging. So the defects are rangi
Electronics Forum | Fri Aug 20 13:36:46 EDT 2004 | ttye01
We conduct temperature stress test (-40 to +100C)on our products which sits on our expensive test board. This stress test on our product shorten the life span of the test board due to the extreme temperature change. I have tried epoxy coating on the
Electronics Forum | Wed Jan 26 12:36:14 EST 2005 | Rob Wilson
I saw in a presentation that military testing of lead-free soldering for reliability has not gone well. Basically, unlike commercial applications where the alloys performed better they did worse when under the more extreme military and aerospace con
Electronics Forum | Tue Mar 01 10:55:07 EST 2005 | spot
A lot depends on the complexity of the board/process as well as the amount of placements. If the board has few placements and the parts are not smaller that 0805 then doing all the rework after completion is ok. The human eye can only pick out obvi
Electronics Forum | Tue Jun 28 11:31:23 EDT 2005 | kennyg
Anyone know of a maximum solder overprint formula? I need to overprint a 0.011" wide aperture but want to go out to 0.050" overprint. This seems extreme, but necessary as I can't go out in width due to numerous issues. It seems like one could come
Electronics Forum | Wed Jul 27 16:46:48 EDT 2005 | russ
I don't think that you would need to test these. Have you ever seen any evidence of solder sticking to them? We use the same material and never notice anything besides flux staying on the bottom. Would the lead absorption if any even be of a concer
Electronics Forum | Fri Oct 28 07:31:37 EDT 2005 | avalancher
I have always encountered problems when using Kester (everything from bad solder to solder balls). I have profiled the boards to the extreme thinking it was my reflow recipie, but with no luck. I ended up going to AIM and I have never had a problem s
