Electronics Forum | Thu Feb 12 11:57:59 EST 2009 | jmiller
i have searched the forum for hours. read all the threads that deals with cleanliness and ionic testing. (http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=40295) (http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=22603) (http://www.
Electronics Forum | Tue Mar 03 03:02:17 EST 2009 | emmanueldavid
25% out of Lands in PCB, Insufficient/Inconsistent Alloy deposition which causes for poor Tackiness between Device Spheres & Paste deposited. Also note that Aperture Opening Designs in Your Stencil draws a huge role for these defects. 4. Placement: P
Electronics Forum | Mon Apr 13 12:06:53 EDT 2009 | jefflkupkt
BoardHouse, Thanks for the reply. The board supplier did cover the cost of the bare boards. Five years ago I saw a different part pass ET only to fail at final assembly test as well. One engineer called it "acid trap" on the inner layers where the
Electronics Forum | Sun Apr 12 08:49:12 EDT 2009 | mki
Hello, I bought used QUAD IVc MKII with transport in "as-is" condition, powered it up (without air and PCB on machine) and all axes (X, Y, Z AND T(heta)shows signs of life. Machine is performing HOME positioning self test. I am not familiar with QUA
Electronics Forum | Tue May 26 11:13:49 EDT 2009 | xinxi
Is the components on the top or on the bottom of the pcb? Have you checked whether the temperature on pcb are too high when it pass through SW that it exceeds the limit that the components can take? Do check with the component manufacture for the te
Electronics Forum | Sun Aug 02 19:47:16 EDT 2009 | isd_jwendell
Now that I've seen the pics... Soldering could work just fine. If you are going for large production then you could get copper discs cut and mounted in tape carrier ($$). This would make it very easy for automated equipment to assemble. Mounting a
Electronics Forum | Fri Aug 14 10:51:30 EDT 2009 | rway
If he is the same Martin Gershenson who works for Christopher, then I'de believe he's being sneaky. We demoed one of their units three years ago, along with Mirtech and YesTech. Of the three, they were the only ones who wouldn't let us experiment w
Electronics Forum | Wed Aug 26 12:38:31 EDT 2009 | smtirl
Folks, discovered an issue this morning where solder joints on PCBs that came out of wash system have turned BLUE! Bare pads and test points also contaminated but not as obvious visually. Looks like it could be a chemical reaction between wash
Electronics Forum | Fri Sep 04 02:09:03 EDT 2009 | sachu_70
Hi Walter, Do you refer to a sprayfluxer operation? The problem seems to be a parameter setting issue. 1. Ensure the wide angle spray reaches PCB with optimum jet pressure. You could pass a glass plate to understand flux coverage and view Jet pressur
Electronics Forum | Thu Oct 01 07:03:55 EDT 2009 | davef
We doubt that Humiseal 1A33 is causing opens in your assemblies. We'd guess the opens occur earlier in the process, but are not hard failures. So, you pass your tests. When applied, the conformal coat flows into the gap in the ball crack and insulate
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