Electronics Forum | Tue Jun 05 20:46:25 EDT 2007 | rfrog
I, too, have finished qualifying the Amtech paste for a dispensing application. We will be experimenting with the component soldering/stencil printing next. The stuff has proven to provide the best of both the no-clean/low solids and water washable
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 | 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 Oct 14 11:34:04 EDT 2003 | Axl
As far as solder paste goes search no further! I have worked for some huge CM's as a Process Engineer and a lot of them have put thousands of hours of Engineering time and evaluation just to come up with the same answer every time. For no-clean it is
Electronics Forum | Thu Sep 23 14:58:50 EDT 2004 | C Lampron
EMS-Engineer, Lead free alloys have a very low wetting creep. You probably will not ever get the same type of weting with a LF as opposed to SN 63/37. The question is if it is acceptable. Lead free solder joints cannot be inspected to the same crite
Electronics Forum | Thu Apr 06 17:02:48 EDT 2006 | jbrower
I'm just dying to hear. I think this past will be a contender for us, I'd use it but I allready commited to using the Kester EM907. Maybe after the first of the year I'll look at switching to this paste. Ive never heard of a problem like that, but
Electronics Forum | Wed Nov 08 08:59:54 EST 2006 | Amol Kane
well, if in the past you havent seen this issue, then something in the process has changed......as any good process engineer should do, investigate it.....new batch of paste?, expired paste?, clogged stencil?, change in programming parameters?, chang
Electronics Forum | Fri Aug 03 15:58:07 EDT 2001 | arsmoriendi
Hi again! First thanks to all for your help. Second, i beleive that i need to clarify something, the unsoldered component was caused due a missing window in the stencil, the process engineer leave the stencil in the production line after i
Electronics Forum | Fri Oct 17 14:33:05 EDT 2003 | AXL
Wait a minute I thought I said Celestica and a few others have done the Engineering evaluations on a list of 10 top solder paste's and Indium SMQ92J and Kester's R560&562 came out on top. First you say 'don't trust all of the so called experts on thi
Electronics Forum | Wed Apr 21 18:24:13 EDT 2004 | pjohnson@volterra.com
Simple process - we use similar Kester solder brands of "no clean" low residue solder wick to clean our pads, then brush with isopropyl, and apply Kesters brand of tacky flux under a Leica 6x microscope. We do this on 7x7mm and 9x9mm packages. This w
