Forum: SMT Production & Design
Thread: Running with sn100c in my solder pot!
Date: June 09, 2006 11:55 AM
Author: jbrower
Subject: Running with sn100c in my solder pot!
Howdy Amol, As far as I can see, there aren't too many pitfalls with SN100C. Just make sure to keep all of your alloys seperated. The issues that I am working out right now is the profiles with our wave pallets and some of our larger components. We are using Kester 920CFX flux, this is an older alcohol based flux and has worked well for us. My solder pot is at 490F so that is only 10F over where we were with Lead. Regarding wave solder plallets, we've seen that SN100C seems to have a different surface tension and doesn't flow into some of the pockets as well. We're sitting down now and determining how we need to modify our pallets and or circuit boards to deal with this. Encouraging though is the fact that I am getting near defect free assemblies across my wave. As far as profile values that is dependent on our flux, pretty much the same profiles, a little tweak here and there, but I did the measurements and did the math to get a really nice delt across both pre heats and my wave. I'm happy with the results. I'm not seeing any microcracks or hot tearing on our boards, We're using an FR4 tg170 circuit board with an ENIG finish and this is proving to be a geat combo all around for our assemblies. Best regards, Jay Brower
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