Electronics Forum | Tue Feb 22 02:51:25 EST 2022 | davef
The industry standard for Resistivity of Solvent Extract (ROSE) Testing analysis is IPC-TM-650 Method 2.3.25 – Detection and Measurement of Ionizable Surface Contaminants by Resistivity of Solvent Extract (ROSE).
Electronics Forum | Tue Dec 23 17:34:07 EST 2008 | davef
We hear you talking two main issues: 1 Solder paste release 2 Thoughts on using two passes of solder paste on the stencil 1 Solder paste release * Check your aperture & aspect ratios [Search the fine SMTnet Archives for more] * Do a better job with
Electronics Forum | Fri Dec 28 13:01:24 EST 2012 | emeto
I assume your problem is comming from the carrier. If it is so: 1. use carrier from another ,aterial 2. Use solder paste that handles faster profile Good luck!
Electronics Forum | Fri Dec 28 13:01:46 EST 2012 | emeto
I assume your problem is comming from the carrier. If it is so: 1. use carrier from another material 2. Use solder paste that handles faster profile Good luck!
Electronics Forum | Mon Jan 21 17:59:11 EST 2013 | jorge_quijano
I had a similar situation with a very thick PCB (0.23") I could not get a TAL lower than 160 sec, I've spoken with my paste supplier about this issue and we have made some adjustments on the oven and we could lower it to 145 sec, I know it is higher
Electronics Forum | Thu Dec 27 13:04:58 EST 2012 | dyoungquist
From the temps you list, I'm going to assume you are using leaded solder. What type of oven profile are you using: Ramp-Spike or Ramp-Soak-Spike? I think you will have better results if you use the Ramp-Soak-Spike type of oven profile. Better chan
Electronics Forum | Tue Sep 09 16:17:45 EDT 2008 | boardhouse
Logannsan, you may want to check into this a little more with your customer to find out what 2 is. It could be as Vlad say's 2Ag -silver, or it could be 2CU -copper or 2Ni- nickel. Also check this form for 62Sn 36Pb 2Ag just my 2 cent. Regards
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 | Wed Sep 10 16:53:46 EDT 2008 | realchunks
Actually it's not rare. I use several pastes from various manufacturers that add 2% silver in their leaded pastes. I would bet it's 2% silver.
Electronics Forum | Tue Sep 09 13:03:19 EDT 2008 | logannsan
What is this? I thought 63sn 37pb was the norm. What is with the 2 at the end? Anyone know?
