Electronics Forum | Tue Jun 01 19:42:46 EDT 2004 | Ken
The biggest fear is mixing the solder pastes and bar solder. Had a training program for teaching folks what the alloys are and how to read them. I have locked up the bar solder and use the buddy system to restock the pot. Put up many signs on le
Electronics Forum | Wed Jul 06 03:23:14 EDT 2005 | javi
We start to get mixed component leaded and lead-free, we still using leaded solder paste in the SMT process. Do you see this a problem to use leaded process 179 deg celsuis temperature reflow on RoHS compatible lead-free components with same specific
Electronics Forum | Thu May 31 13:20:30 EDT 2007 | HOSS
Looking to qualify a new lead free WS paste. I'd like to know who is happy with what material and why. Reflow consistency and cleanability are critical for us. I have a paste I'm using now that is giving us mixed results (reflow issues). Any info
Electronics Forum | Fri May 11 09:56:58 EDT 2012 | cyber_wolf
Paste control is a subject that has a lot of unfounded claims surrounding it. What is the difference in having a "working paste jar" and a "new paste jar" Either way new and old are getting mixed at some point. We just don't buy onto the whole thing
Electronics Forum | Tue May 02 15:25:22 EDT 2017 | mrk
Hi, We have recently been tasked with producing a PCB assembly that requires a chip resistor to be stacked on top of a chip capacitor (both are 0603 package size). This becoming a more common practice, I was wondering if anyone has been successful i
Electronics Forum | Thu Mar 15 07:49:44 EST 2001 | jax
I am not sure if it is feasible in your situation becuase I don't know enough about your board ( mixed technology, single-sided, etc.... ) , but have you ever considered screen printing paste onto the test points?? JAX
Electronics Forum | Wed Jun 05 15:22:48 EDT 2013 | davef
Solders, Fluxes and Pastes - A Lab Report This webcast consists of 10 individual program segments focused on the important topic of electronics solders, solder pastes and fluxes. Program Segments Include: * Can You Mix Leaded and Lead-free? * Probl
Electronics Forum | Wed Sep 10 17:21:08 EDT 2008 | gregoryyork
Strange we use the 179~C eutectic 62/36/2 solder paste as standard in Europe. It is indeed 2% Ag in fact we dont sell 63/37 paste or very rarely. I think if you mix a little 60/40 powder with the 2% Ag alloy this overcomes the tombstoning problem.
Electronics Forum | Thu Jun 08 09:26:26 EDT 2023 | frankchan
placement> (curing)> reflow soldering> cleaning> inspection> rework SMT production process Surface mount process a. Single-sided assembly: (All surface-mount components are on one side of the PCB) Incoming inspection-solder paste stirring-screen prin
Electronics Forum | Fri Mar 23 11:58:01 EST 2001 | mparker
You are mixing long exposed paste back into fresh? How long has your fresh jar been open to the air? You are probably doing yourself a disservice by scavenging the paste (it could have moisture entrapped). Your visocity has definitely changed. You a
