Electronics Forum | Fri Jul 06 12:39:01 EDT 2007 | blnorman
What's the metallization on the board? We use an immersion tin board and had to increase our profile to successfully solder.
Electronics Forum | Thu Sep 13 13:36:46 EDT 2007 | russ
switch pastes and see what happens, Kester had issues with their fluxes a little while ago and you may have gotten one of the bad batches. R
Electronics Forum | Thu Nov 01 13:02:13 EDT 2007 | slthomas
What are you using? I'm having a tough time finding something I used to use (Kester, seems like it had a liquidus temp. of about 265�).
Electronics Forum | Mon Nov 12 14:16:27 EST 2007 | sueph
Sorry, should have said the type of flux we use. It's Kester 186 RMA flux. Does that make a difference?
Electronics Forum | Mon Nov 26 15:22:09 EST 2007 | kevslatvin
It is the EM907 that we are currently using. All of the jars we currently have are made in Mexico. When did production move back to the US?
Electronics Forum | Tue Nov 27 08:47:24 EST 2007 | ratsalad
The letter below was dated December 13, 2006 from Kester's Senior Market Development Engineer. I guess since then they have moved production back to Mexico. We no longer use EM907 as our primary Pb-free paste so I haven't seen any containers in a w
Electronics Forum | Wed Oct 22 12:13:18 EDT 2008 | brismittr
A no-clean paste with an above average amount of halides should do the trick. Kester EP256HA is a good choice for this application if you are using a leaded alloy (Sn63 or Sn62).
Electronics Forum | Mon Feb 02 16:30:16 EST 2009 | davef
Probably the three biggest players for screenable, water soluble temporary soldermasks are Techspray, Chemtronics and Kester/Techform. What do they say?
Electronics Forum | Fri Nov 13 08:27:43 EST 2009 | herman
Your customer is very unreasonable to demand void-free BGA SJs. Minor voiding is not a condition for rejection per IPC-A-610D, J-STD-001D, or even J-STD-001DS (Space addendum). Having said that, let me tell you that the voiding has little or nothing
Electronics Forum | Tue Sep 14 13:43:25 EDT 2010 | rayguide
Use No-Clean fine-particle solder paste from Kester. http://www.suite101.com/content/solder-paste-and-its-application-in-smt-a249514
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