Electronics Forum | Tue Jul 24 10:23:36 EDT 2007 | ck_the_flip
Michelle, Traditionally, the adhesive side is always run first since most designers put passives (resistors, caps) on the adhesive (solder side) of the board. I worked in an environment where we did the adhesive side first, sometimes the boards "sa
Electronics Forum | Thu Aug 02 11:46:22 EDT 2007 | realchunks
Congrats Shrek - sounds like you found your heaven, blaming others. About "IT". Wow, what kind of hype was that? I thought this would be something worth reading. Looks like a first year Project Manager thought of this. I agree, who ever thought
Electronics Forum | Thu Jul 26 13:08:59 EDT 2007 | Mike Konrad
The best method of cleaning misprinted boards is with a stencil cleaner. I would not recommend the use of a spray-in-air system for misprints. Spray systems can cause solder paste to become embedded into vias and under components (if double sided).
Electronics Forum | Tue Jul 31 17:11:28 EDT 2007 | rpadilla
Is the via hole not supposed to be there, or is this by design? If you are trying to fill the via hole with solder and not have voiding issues, I suggest using a type 4 solder powder mesh size. Reason being, anytime you go beyond Type 4 mesh, to so
Electronics Forum | Sat Jul 28 08:37:52 EDT 2007 | davef
There is no good choice. Board Finishes: Industrial/Battelle Class 3 Environment [Reliability Knowledge Gaps: For use of Pb-free solders in High Reliability Applications, J Smetana, iNEMI Availability of SnPb-Compatible BGAs Workshop, March 1, 2007,
Electronics Forum | Fri Jul 27 09:28:35 EDT 2007 | rich7799
I have Mpm ap25hie, s/w ver 7.1a The problem I have is that the machine works fine until I teach or use the pre board stop function. As soon as I use this the machine will not load the pcb to the centre of the work nest. I can manually change boardst
Electronics Forum | Wed Aug 08 17:50:22 EDT 2007 | flipit
X7R >Z5U,Y5V Greater means less likely to crack or in other words NP0 is better than X7R for crack resistance. Don't think that there is a set formula. There isn't! I cracked ceramic resonators at 0.050" from the board edge with CAB M2 and M3 dep
Electronics Forum | Mon Jul 30 16:33:21 EDT 2007 | billyd
Hi everyone. While this isn't exactly SMT, I'm sure most of you at least utilize the technology; I'm looking for someone I can contact with questions regarding my BMEP-5T press. I've been charged with getting the process up and running, but it's been
Electronics Forum | Tue Jul 31 10:10:45 EDT 2007 | patrickbruneel
AJ The metal prices are set by the London LME. The Tin prices went from 8,000 US$/tonne July 2006 to 16,000 US$/tonne July 2007. Check here http://www.lme.co.uk/tin_graphs.asp Just change the dates to get the price differences over time, the furth
Electronics Forum | Tue Jul 31 22:06:12 EDT 2007 | davef
We had no problems reflowing an assembly on Bergquist Thermal Clad. The assembly was small. So, we built it on a 8-up fixture. It stayed in the fixture from screen print, through pick and place, and into reflow. When the fixture came out of the r
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