Electronics Forum | Wed Sep 14 09:19:30 EDT 2011 | swag
Target those specific parts/leads with a thermal-couple and a mole and try to get the peak reflow temps up to 225 C. It's not a cure but it will improve the apperance of the solder joints.
Electronics Forum | Mon Sep 12 10:41:50 EDT 2011 | processmxli
Hi All We have run SMT process with SnPb but we’re installing some lead free components like capacitors and resistor lead free. After the reflow oven all components have good appearance with solder join sheen. But the lead free components the solde
Electronics Forum | Tue Aug 31 21:45:49 EDT 2004 | KEN
I have experienced this directly in SMT and wave solder. Fillet lift (can) be a direct indicator to lead enrichment (but its not the exclusive symptom). Lead enrichment in smt joints reduces the interfacial strength shortening the time to creep f
Electronics Forum | Thu Jan 19 14:43:08 EST 2006 | jeffharley
So as far as pb free compliance in EU there would be no residuals from pb on the pcb's to speak of. We also have deionization cabinet with chealate filter for heavy metals that recirculates the wash water.
Electronics Forum | Tue Aug 31 19:17:43 EDT 2004 | russ
Now see Dave, now I have some good info on why it is "bad", This must be the lead enrichment I have heard about but never got any substantiated data or explanantion. I wonder how much weaker or less reliable these are. Is there any data that you k
Electronics Forum | Mon Dec 13 14:02:28 EST 2004 | DasonC
Question: If we run the same oven to run both lead free and lead paste. Will any lead contamination transfer to the lead free board by force conversion?
Electronics Forum | Thu Nov 30 11:10:36 EST 2000 | DL
Can anyone point me in the direction of where to find some lead placement equipment. Currently we have Clip leads that come in reels with solder pre attached are currently done by hand. surface mountable leads/connectors will not do, due to board/end
Electronics Forum | Thu Aug 11 14:10:31 EDT 2005 | kmorris
Okay....we're all familiar with "J" leads and "Gull wing" leads on SMT components.....can anyone elighten me on what a "flat ribbon" lead is?? Can you supply a picture? Thanks in advance.
Electronics Forum | Thu Aug 11 16:38:36 EDT 2005 | russ
Don't have a picture but a ribbon lead is jaust a flat lead with no standoff capability. look at a SMT electrolytic cap for this lead type.
Electronics Forum | Wed May 03 10:58:35 EDT 2006 | rlackey
Hi has anyone noticed any issues with reduced component lead diameters on through hole resistors? All the volume manufacturers have or are in the process of reducing the lead diameters from 0.6mm to 0.4mm due to the huge increase in copper prices o
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