Electronics Forum | Mon Sep 11 09:43:14 EDT 2006 | C.K.
So, your scenario is: * Lead Free Solder Paste * Lead Free Reflow Profile * RoHS Components * Non-RoHS (Sn-Pb HASL plated)PCB If that's the case, you should be just fine running your Lead-Free process. There is literature on the topic of lead
Electronics Forum | Mon Aug 31 09:55:09 EDT 2009 | pjc
What is the common practice for cleaning Tin/Lead and Lead Free solderpaste on stencils- some machines have filtration I'm told, so its not an issue according to the mfrs. On machines that don't have filtration do you run one after the other? Do you
Electronics Forum | Mon Feb 04 14:42:08 EST 2008 | ratsalad
Are you talking about Durastone? That's what we use for our wave pallets. Both our wave vendor and solder bar vendor told us that we had nothing to worry about as far as Pb-contamination of the pallets. We have used the same pallets across our Sn
Electronics Forum | Sun Sep 13 09:21:26 EDT 2009 | davef
You as, "What data is available showing the long term reliability of the intermetallics of the solder joints?" Alloy||Microstructure Sn-Pb||Lamella or globules Sn-Cu||Sn-matrix, Cu6Sn5 needles or globules Sn-Cu-Sb||Sn-matrix, cuboids of SbSn and Cu6
Electronics Forum | Tue Nov 07 10:43:25 EST 2006 | muse95
Also, have you considered the possibility that if you solder on an existing joint on a board that was built with SnPb solder, even though you are using leadfree solder wire, you would now contaminate the tip of your soldering iron. If you then start
Electronics Forum | Wed Jan 31 17:57:07 EST 2007 | blnorman
We've had multiple issues with non-wetting components. You say only one part is not wetting? Profile won't be the culprit, if so you would have more part issues. We've used SnPb with lead-free parts for some time now, no issues. The issues we had
Electronics Forum | Thu Jan 27 14:49:53 EST 2000 | Glenn Robertson
Tuan - One of the reasons I suggested pre-tinning (aside from the negative effects of Gold on appearance and reliability) is the known slower wetting of Sn/Ag and Sn/Cu alloys as compared to Sn/Pb. If you don't have to be Lead-free, the high Lead
Electronics Forum | Fri Jun 22 13:47:51 EDT 2007 | 18424
Good afternoon all, I am looking for help from you folks to find a place that can do metalurgical analysis on components and contamination. We are an OEM and just recently received back from the customer several units that failed in the field after
Electronics Forum | Fri Jun 22 13:49:46 EDT 2007 | 18424
Good afternoon all, I am looking for help from you folks to find a place that can do metalurgical analysis on components and contamination. We are an OEM and just recently received back from the customer several units that failed in the field after
Electronics Forum | Tue May 26 20:18:09 EDT 1998 | Justin Medernach
| | | | I'm reviewing my board fab spec. It calls for a minimum SnPb thickness of 50 microinches on HASL PWB's. I've looked at other specs that call out anything from 30 to 80 microinches, and others that just say the copper pad must be covered and
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