Electronics Forum | Fri Jul 30 20:11:35 EDT 1999 | Mike Konrad
It is true that the use of saponifiers (and other water soluble additives) will lower the surface tension and aid in under component penetration. It is also true, however, that other specific design features within a batch machine can also aid in un
Electronics Forum | Tue Sep 24 12:58:27 EDT 2002 | dragonslayr
Although focusing on solderability may be the right answer, I wonder if you are satisfied that co-planarity is not the root cause. With random events of contact opens, this may be the case. Cleanliness of the stencil can also be a source of your pr
Electronics Forum | Fri May 15 10:36:08 EDT 1998 | Justin Medernach
| List, | Is there any special disposal protocol needed when the | filters on the PC board washer becomes clogged? How | often do these filters become clogged? These filters | would trap lead and such so how much does it cost to | get rid of the f
Electronics Forum | Tue May 03 10:57:22 EDT 2005 | Frank R.
We received about 5K assembly boards from china. They left flux residu on top of the board and the flux they use was different than us. RESULT ... we use a translucent cylicon to cover the board and it was not possible to dry the cylicon because of
Electronics Forum | Mon Jul 27 17:09:20 EDT 1998 | Rin
| We are trying to reduce the number of units fail at system test due to flux on gold finger. We know so far that the flux is deposited onto the | goldfinger during touch-up or rework and to reduce the contamination we are | planning to imp
Electronics Forum | Thu Dec 12 09:21:42 EST 2002 | blnorman
What we did: *Slump-dot diameter and height as a function of time *Print Speed-Vary speed, measure slump and missing/defects *Green Strength-We quantifiably measured tack vs time and we placed components and measure skew by SVS *Cure profile sensitiv
Electronics Forum | Thu Jan 23 14:19:56 EST 2003 | Mike Konrad
Hi Randy, No-clean flux needs to be activated in order to burn off the volatiles in the flux. This normally occurs partly during preheat and certainly during the reflow or soldering process. In most hand soldering applications, an operator applies
Electronics Forum | Tue Sep 04 09:38:38 EDT 2012 | cobham1
The best thing you can do is to clean the board that has a solder paste defect on it. If you don't you probably will have issues after reflow. This could include bridging, raised parts, or any number of issues. You need to remember that if you are re
Electronics Forum | Tue Oct 09 11:22:08 EDT 2001 | nifhail
Can I use one common cleaning agent to clean the stencils from a lines which are using RMA, No-clean and clean paste ( b'cos we onlyhv one stencil cleaner ). What about those misprinted board ? Can all of them use the same chemical or cleaned in the
Electronics Forum | Tue Dec 08 11:49:44 EST 1998 | Dave F
All Y'All: A recent (10/98) article in "Circuits Assembly" magazine touted the use batch cleaners using a aqueous alcohol solvent. Reported benefits of this approach were: 1 Better use of floor space 2 Ability to develop custom recipes 3 Ability
