Electronics Forum | Mon Nov 15 20:56:20 EST 2004 | davef
In the most straight foreward terms, low residue fluxes are: * Less expensive than other flux types from an equipment purchase stand-point. [Obviously, this is a benefit to only those either without equipment or readily able to dispose of the equipm
Electronics Forum | Mon Mar 25 21:50:10 EST 2002 | davef
Some of this was copped from Fred. There are numerous package types that now fall under the rubric of land grid array [LGA]. Land grid devices [ie, Bumped Chip Carrier� [BCC], LGA, Quad Flat-pack No-lead [QFN], MicroLeadFrame�, etc] are essentially
Electronics Forum | Wed Aug 29 12:12:14 EDT 2018 | solderingpro
What type of flux are you using today? - Obviously you have already outlined the difference in the parent materials and parent material preparation, so using the same program/profile will not work; the characteristics are different. Try increasing p
Electronics Forum | Tue Feb 03 13:39:08 EST 2009 | grics
Good morning Jamie. I work at a CM and can offer some input on process flexability. I do not have any data on how reliable the coating is but I can say that they are both very difficult to control. Will you be selective coating or full coating? Ho
Electronics Forum | Wed Feb 22 03:29:09 EST 2017 | niki
Which is the best way to clean the PCB after > soldering? Is it good enough with IPA > (isopropyl) or with the Flux Remover > spray? However, we use a lead free solder wire > (3,5% flux inside the core) and after the > soldering its a visible we
Electronics Forum | Wed Jul 12 09:45:16 EDT 2000 | Charlie
The following are questions my boss has ask me to send out to you folks. This is done in an effort to see "What does the rest of the world do?" [if such a world could possibly exists, in the first place]. If you would select any or all questions to r
Electronics Forum | Mon Jun 13 21:08:12 EDT 2005 | davef
Paramjeet Singh Gill So, you underfil before cleaning. Interesting. * What is it about your underfill that prevents the OA flux from attacking the FC solder balls? * Who is the underfill fabricator and product? Getting back to your solder balling
Electronics Forum | Fri Apr 16 11:03:35 EDT 2004 | davef
Your copper corrosion is not good. It indicates that you have not done a good job in cleaning. [We assume this is a medium green color, not unlike the color of the solder mask on your board, that is almost like a translucent lacquer; rather than th
Electronics Forum | Thu Apr 17 10:44:24 EDT 2008 | rculpepp
I'd suspect contamination also, possibly from the board supplier. Sr. Tech's post mentioned what looks like a blister on the board, in the upper right of the Q19 photo. This could very well be a contaminate from the PWB fab shop. I've seen similar pr
Electronics Forum | Mon Sep 14 17:39:37 EDT 1998 | Steve A
| I am running composite fixtures on my wave solder machine and after about 500 passes each (1 month)they are showing serious signs of wear in that the composite surface is bubbling up and glass fibers are also starting to show. | The problem here
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