Electronics Forum | Tue Aug 23 09:53:05 EDT 2005 | davef
There's some good background information on SIR [surface insulation resistance] on the web. Here's an example: http://www.tracelabs.com/TechLibraryDoc.aspx?id=4 Look to IPC-9201 - Surface Insulation Resistance Handbook SIR readings vary with: * C
Electronics Forum | Wed Feb 22 08:01:42 EST 2006 | INGE
We have a new SMT line, our customers are asking us the validation of the process. Not only the validation of the resulting assembled board (solder joint...) but also a validation of every single machine in the line (ex. stencil printer...). For exam
Electronics Forum | Mon Mar 06 07:42:48 EST 2006 | davef
Epoxy inks tend to be more resistant to discoloration than the acrylics that are used more widely now. The acrylic-based inks vary in their ability to maintain color after heat cycles. The technical data sheets from the ink supplier should indicate:
Electronics Forum | Tue Apr 04 09:39:14 EDT 2006 | pjc
No, Orbotech is pretty popular wordwide I'd say. This is suppose to be a technical forum, not an "opinion" forum. Just becuse an AOI machine works well in one appliaction does not mean in all. Plus, after sale support varies regionally. You should do
Electronics Forum | Tue Apr 25 12:29:35 EDT 2006 | Rob
Hi TMC, It's very unlikely that you'll get a temperature variation of 32 degrees by varying the top and bottom heaters - especially if it's forced air convection, as if it's a half decent system the hot air will be circulating in the zone, pretty qu
Electronics Forum | Fri Sep 15 12:30:05 EDT 2006 | Steve
If the package is robust enough to handle surface mount followed by a pass through the wave soldering process, we have had excellent results populating the fine pitch parts with the P&P machine, reflow, then mask the solder joints prior to wave solde
Electronics Forum | Thu Mar 01 16:47:05 EST 2007 | ratsalad
The guys that take our dross (and pay us for it) take our barrels that contain scrapped solder paste as well. Also in the barrels are the nitrile gloves and disposable towels used in solder paste handling and cleaning. They pay us for the metal c
Electronics Forum | Thu Mar 15 09:11:06 EDT 2007 | jdengler
Chrissie, This varies widely by paste, room temperature, and humidity. You would need to do a DOE for you exact set-up. Since you say the room is uncontrolled you need to keep in mind that time will drop as temperature goes up. Different pastes re
Electronics Forum | Thu May 24 22:56:42 EDT 2007 | davef
We'd guess that your white residue on the solder is from minerals in the supply water. We expect the levels of these minerals that you see: * Vary depending on the season. Check with your public water authority for anaylsis. [Recognize that this ma
Electronics Forum | Thu Jul 05 10:32:56 EDT 2007 | realchunks
WRONG! Actually I was going to say the same thing but figured I would have the standard 3 people dissagreeing with me, and or correcting me. I do believe your wave solder temp should remain a constant temp and prolly will not vary at all, so I woul
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