Electronics Forum | Fri Apr 13 03:20:57 EDT 2007 | bart.lozie@page.be
Hello, why focuss only on the printer and the paste, maybe the problem isn't there, maybe the problem is in the oven, is the component a havy one? because leadfree solder can't lift as mutch as a leadcontaining solder. regards Bart
Electronics Forum | Sat Aug 18 12:28:46 EDT 2007 | shing
I have checked all the method before, the problem still exists. Is there are more easy way for operator to visually check solder paste on golden finger? for example: using a special light as a tools for operator to identify the problems easily.
Electronics Forum | Thu Aug 20 08:24:07 EDT 2009 | padawanlinuxero
Hi ! In both solder mask and solder joint, I am going to upload a picture today promise, I use only IPA and a ESD brush this kinda clean the problem
Electronics Forum | Mon Oct 11 11:13:32 EDT 1999 | Wirat S.
| | | We've recently encountered this problem where one of our .050" pitch BGA's were reflowing at the wave thus causing shorts... The board was profiled with probes stuck to a QFP solder joint, an 0603, and one of the BGA joints. There was an almo
Electronics Forum | Mon Dec 13 00:48:33 EST 1999 | armin
Hi All I have a 0.7 mm diameter hole for vias, what�s the minimum annular ring for this hole diameter? What�s the term unsupported and supported holes refer to in IPC-2221 9.1.2 Annular Ring Requirements? I have a proto-type PCB (designed by our R&
Electronics Forum | Fri May 10 14:02:05 EDT 2002 | pjc
First off what bone-head designer put them there in the first place. Vias in solder lands is a big time no no. I had this problem at a CEM I worked at. I had the customer change the design but had to run the 6 samples they supplied. I ended up fillin
Electronics Forum | Fri May 15 18:09:00 EDT 1998 | Earl Moon
| | | We understand that testing for ionic contamination and surface insulation resistance measure different properties. We assemble printed circuit boards for other companies. We will not get combs on 90% of the boards that we assemble. | | | We h
Electronics Forum | Fri Jan 08 17:56:16 EST 1999 | Eric Miller
Hi Chrys, Hate to bring you down, but, wave solder pallets exposed to any kind of flux is subject to "Build up" on the carrier. You still have to clean them, hopefully on a regular basis.If the pallet is being run in a high production envirnment, I w
Electronics Forum | Tue Sep 03 22:32:04 EDT 2002 | davef
Naw, alcohol and solvents won't do dip. Hold-off on: * Destructive testing. [Athough this will convince you to move on to other things.] * Rework of the solder connections. [Although this will correct the problem.] Consider investigating your aque
Electronics Forum | Tue Aug 10 06:29:49 EDT 2004 | Nippy
Hello, I am in need of some assistance with a problem we are having with soldering some terminals... Basicaly I need to solder thin tabs onto a round metal post (hole through tab) We have been seeing poor quality joints, de-wetting and what looks l
