Electronics Forum | Thu Jun 21 07:21:26 EDT 2007 | chrispy1963
5 mil is perfect for 0402's. If you are printing SnPb solder use apeture reduction such as home plating the pads. However, if youre using SAC, we've found that printing the entire pad works best due to poor wetting compared to SnPb paste. Chris
Electronics Forum | Thu Nov 08 10:05:04 EST 2007 | pjc
I have not seen hold size as an issue when switching Sn/Pb to Pb Free wave soldering. Trying increasing your dwell time in the wave- typical for Sn/Pb is 2 to 3 seconds. Try 5 seconds to see what you get.
Electronics Forum | Mon Aug 04 14:54:09 EDT 2008 | blnorman
J-STD-001 Table 5-1 lists the allowable impurity levels for SnPb wave solder pots.
Electronics Forum | Sat Sep 12 10:12:20 EDT 2009 | tylaburg
My customer wants an SnPb 63/37 BGA soldered using SAC305 solder paste. What data is avaiable showing the long term reliability of the intermetallics of the solder joints?
Electronics Forum | Fri Feb 04 16:07:38 EST 2011 | pjc
If your peak temps in profiling the Sn/Pb solderpaste are 210C-215C, then no, you will not "weld" to the SN100C finish. SN100C is liquidus at 227C, too hot for most Sn/Pb solderpastes.
Electronics Forum | Sun Mar 31 00:42:09 EDT 2013 | dhanish
Why we cannot run Pb Free BGA with Sn/Pb process but we can run high temp BGA(90/10) with Sn/Pb? Both require high temperature to form the IMC.Why there is a difference in the reliability?
Electronics Forum | Sun Jul 10 03:39:12 EDT 2016 | rgarcia0626
We have wave soldering machines with SnPb.... the problem is they want to shut off the exhaust fan when there is no production even if the entire machine was not switch Off and the pots are maintain the 250°C. Can someone give any idea on the implica
Electronics Forum | Tue Jun 20 11:31:15 EDT 2006 | muse95
This has been debated several times on this forum, but I have to say the opposite of Samir. I would rather see a SnPb BGA in a Pbfree process(as long as the component can take the heat) than a Pbfree BGA in a SnPb process. There has been some mention
Electronics Forum | Fri Apr 18 07:50:10 EDT 2008 | scottp
I'm curious if anyone has figured out a clever way to errorproof this. We're exempt from RoHS so we have mostly SnPb products but some Pb free ones at customer request. Of course, we have methods to control moisture sensitive parts, but I worry tha
Electronics Forum | Thu May 01 10:31:26 EDT 2008 | cdsullivan
Good Morning, We are seeing an increased number of our customers that specify a Pb-Free BGA when the rest of the board assembly is SnPb. Of course when we reflow at the SnPb profiles, we don't always get a properly collapsed BGA. So we end up rewor
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