Electronics Forum | Thu Dec 07 10:05:18 EST 2006 | Learn from U
Hi all, Sorry for the late reply..I am sure it is flux residue..Found no such symptom as Grey mention above. This is non clean process and no way we can clean this whole big board(Server) with any kind of flux removal...Currently, the ICT probe pre
Electronics Forum | Wed Dec 06 16:48:42 EST 2006 | Mario Scalzo
I would be glad to help you eliminate the solder balling and beading that you are seeing. As this is a fairly common defect, I would like to forward you an Application Note that we have developed that explains the cause and possible solutions. Most
Electronics Forum | Thu Dec 07 19:20:28 EST 2006 | ganoi
Most likely there is movement during reflow. How about conduction oven over convection oven for reflow? This is a small PCB with the LED sitting on a Flex-Rigid extension from the PCB. I was thinking if the stencil aperature for the LED was to be cu
Electronics Forum | Tue Dec 19 12:14:47 EST 2006 | realchunks
Hi Darby, No, I'm not cutting on the robot guys. I actually went thru their site and found it interesting. They truely use their knowledge and creativity, which is a rare thing to find these days. That, coupled with their common sense and resourc
Electronics Forum | Thu Dec 21 15:11:53 EST 2006 | billyd
Hey fellas. Listen, I'm trying to see what the industry as a whole is doing with regard to placement and reflow of the tiny QFN devices. Not the larger ones, but the 4mm or 5mm ones. We struggled a bit with a QFN24, 5mm square. The thermal pad undern
Electronics Forum | Thu Jan 04 15:39:49 EST 2007 | realchunks
Is it a failure or a schedule overdue? If it's a failure check the vacuum sensor in the exhaust. You should be able to locate the straw and follow it back to the diaphragm. You can adjust the diaphragm. Or you can electrically jumper past it.
Electronics Forum | Thu Dec 28 16:17:23 EST 2006 | joey_dragon
Good tidings, all. I am looking for a machine that will allow us to mount a flat flexible strip (such as TennRich's B.Type) to a row of pads on a PCB. I have not much knowledge about the process, I guess I expect to see a machine with some hot bar.
Electronics Forum | Wed Jan 03 21:20:22 EST 2007 | davef
Comments are: * General purpose RTV (RTV-108) releases an acetic acid (vinegar) during cure and corrodes copper, brass and sensitive metals. It is therefore NOT for use in delicate electrical or electronic applications. However, there is an electrica
Electronics Forum | Thu Jan 11 00:17:08 EST 2007 | behrsam
Thanks both of you for responding. I am using a protoype reflow oven. It uses a programable controller to ramp the temp up. It has convection and radiative heating. Ultimately yes, I would like to use a vacuum furnace like the sst but it is not c
Electronics Forum | Mon Jan 15 03:42:08 EST 2007 | adamp
Hi all, Last week I have noticed, that solder changed colour in our Soltec wave soldering machine. I am using normal 62Sn37Pb alloy and it's colour changed to violet/darkblue with gold areas. I know that gold colour means that, there is to much Cu i
