Electronics Forum | Thu Jun 26 20:54:08 EDT 2008 | davef
As pointed-out above, the downside of telling your supplier how to perform a process can create problems: * It sets the cost of the operation ... I did what you told me to do * Materials selected may be incompatible ... I did what you told me to do *
Electronics Forum | Fri May 12 07:41:15 EDT 2023 | tommy_magyar
Although I see the advantages in your method, not sure though how to deal with the following: 1. Your batch is actually only one board (or panel) - this would not work in a low volume manufacturing environment, unless there are other jobs set up on t
Electronics Forum | Thu Oct 21 08:25:23 EDT 2004 | fcox
What are the most common solvents/processes being used to clean paste from metal stencils? Any heat?
Electronics Forum | Thu Apr 10 14:35:18 EDT 2003 | russ
What flux are you using to put them back on? you should be able to adequately clean the site after removal with alcohol or water depending upon the type of flux. "White grungy" usually comes from a liquid flux such as Alpha 857 being squirted on th
Electronics Forum | Thu May 04 11:42:05 EDT 2023 | proceng1
I did some further reading yesterday and an ultra-sonic dip tank seems to be the recommendation, using a BGA cleaning solvent. I am not sure how such a process would affect the populated side of the board.
Electronics Forum | Thu May 04 11:37:25 EDT 2023 | proceng1
Thank you. I do feel that the document is very lacking in detail. It mostly says "yes, it needs cleaned. Make sure the cleaning process doesn't screw it up". The majority of boards that get wiped are already populated on the other side. So that lim
Electronics Forum | Tue May 09 11:46:03 EDT 2023 | tommy_magyar
I re-read the comments and it is unclear what will be the resolution applied in your case, neither if you use the stencil washer for misprint cleaning purposes. I am just curious. Are you not using your stencil washer to wash the PCBs too? Thinking i
Electronics Forum | Thu May 04 01:52:17 EDT 2023 | davef
Look at IPC-7526 - Stencil and Misprinted Board Cleaning Handbook, Misprinted Circuit Board CleaningCLEANING [ https://www.multi-circuit-boards.eu/fileadmin/user_upload/downloads/leiterplatten_design-hilfe/ipc-7526.pdf ] ITW/EAE says "Typically, th
Electronics Forum | Tue May 30 09:27:08 EDT 2000 | PhilB
More and more PCB fabs are switching from chemical copper to what is called a "black hole" process from McDermitt.In this process a very thin layer of carbon is put on the base material instead of chemical copper. Can anyone tell me about the advanta
Electronics Forum | Fri Aug 26 10:10:14 EDT 2011 | blnorman
IPC just released IPC-CH-65B which gives a lot of guidance regarding the cleaning process. It addresses the processes, chemicals, well worth getting a copy.
