Electronics Forum | Wed May 30 17:21:25 EDT 2007 | troyboesch
Pretty much everybody does functional or system test at the end of a printed board assembly line. In-circuit or MDA test hits most complex boards. But, 3D xray is being pushed by Agilent, Teradyne, and TRI. No fixtures and a high call rate for sol
Electronics Forum | Thu May 31 11:07:23 EDT 2007 | pjc
ICT and AXI are two different methods for MDA. ICT checks component values and polarity- component and circuit electrical testing while AXI checks solder joints- volume, voids, bridging, etc.... Typically, AXI is in the SMT process engineering and QA
Electronics Forum | Tue Jun 19 13:57:40 EDT 2007 | realchunks
Hi Bill, You should contact your local water work dept. and work with them. Every county is different. Sometimes it not what you put in the drain, but how much. They may want to monitor your drain, which is standard stuff. Be prepared to show th
Electronics Forum | Thu Jul 05 08:11:45 EDT 2007 | naynayno
This is wave soldering process and design question since most folks associated with SMT are processing mixed assemblies. We have a 3-leaded sensor (radial) with such a tight pitch always bridges. Solutions unders disussion are pre-forming and addin
Electronics Forum | Thu Jul 05 13:47:10 EDT 2007 | arun2382
QFN assembled on a PCB indicates paramteric fails when tested. When the QFN on PCB is reflowed a second time, it recovers and passes testing. Visual, X-ray inspection revealed no anomalies. Cross-section images of solder joint revealed no anomalies (
Electronics Forum | Fri Aug 17 17:55:42 EDT 2007 | htran
My small reflow oven doesn't have the rails (only metal mesh). I personally don't think it was built for double side reflow assembly and there is vibration as well. We are a small low volume mfg house and our reflow oven doesn't have the capability t
Electronics Forum | Tue Aug 14 16:50:43 EDT 2007 | rgduval
I see...said the blind man. If you've got the LED's on one side, and the SMT on the other...and you have the clearance, I'd go with the previous suggestion of gluing the SMT, and waving the whole assembly... As for stenciling....use a glue dispense
Electronics Forum | Wed Aug 22 11:58:11 EDT 2007 | ev
Thanks for all responses really good feedback. I have placed a number of extra supports underneath each pcb in the panel and by checking each print diligently we seem to be able to keep running. Not feaseable at the moment to check out leaded paste o
Electronics Forum | Wed Sep 19 17:36:16 EDT 2007 | slthomas
Like davef mentions, there are guidelines for both design and fabrication, not to mention assembly (which from the original post doesn't appear to come into play here). Not that I could improve on what dave has already shared, but it would be nice t
Electronics Forum | Thu Oct 04 16:07:03 EDT 2007 | jdengler
Everything for a lead free job is labeled with green lead free labels. This includes all processing documentation. When the kit is issued to production the production supervisor and SMT lead operator are reminded that the job is lead free. When th
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