Electronics Forum | Fri Oct 01 02:46:47 EDT 2021 | sn
Thanks, Evtimov. In terms of mechanical drop performance, can we conclude that the higher Ag alloy will have poorer drop shock performance relatively compare to those with lower Ag? The Ag3Sn is a good IMC for welding strength?
Electronics Forum | Fri Jul 08 09:57:31 EDT 2005 | fctassembly
Proy, Another issue is what exact formulation of SAC is used. Much of the SAC305 being used in Asia contains phosphorus, which is added in an attempt to reduce the heavy drossing that SAC305 produces. Phosphorus acts as a flux on steel so will increa
Electronics Forum | Fri Feb 03 17:47:06 EST 2006 | Brian Smith
Kester offers Tin-Copper AND Tin-Copper-Nickel. The Kester K100 alloy is a Tin-Copper-Nickel material that is very similar to SN100C. Straight Tin-Copper isn't tremendously popular but can be used in low-cost, consumer-electronics applications wher
Electronics Forum | Tue Feb 01 11:54:14 EST 2005 | TomA
Indy, I found the same findings as you. The claim is that the solder joint may actually look closer to a SnPb solder joint then the SAC alloys. I had commited to the SAC alloys at SMT before finding out about the SN100C alloy. I'm interested in what
Electronics Forum | Mon Jul 11 19:32:27 EDT 2005 | fctassembly
Yes, there have been many issues with the fast dissolution of copper by the SAC305 alloy. In fact, there are companies who have disqualified it for repair operations due to loss/thinning of the pads. SN100C dissolves copper much slower than SAC305 an
Electronics Forum | Tue Jul 05 10:04:59 EDT 2005 | Inds
Hi All, we are running a process where we are wave soldering the PTH components using SAC305 alloy. During rework process (using SAC alloy in the solder pot) we are seeing good amount of Cu dissolution, to an extent that the Cu has completely disapp
Electronics Forum | Thu Dec 29 22:19:36 EST 2005 | Joseph
We have tested SN100C for LF wave soldering process since August'05 and currently start production for a month ago. Initially we use SAC305, but due to the shrinkage cavities (micro-crack) we changeover to SN100C. In summary, SN100C did perform well
Electronics Forum | Tue Feb 07 13:01:52 EST 2006 | amol_kane
Hi, does anyone have any experience with common wave soldering defects using SAC305 alloy?.....i am finding a lot of what seem to be shrinkage cracks on the bottom side surface of the soldered components.....there is also a lot of directional cooling
Electronics Forum | Sat Feb 18 15:40:45 EST 2006 | Cmiller
Switch to SN100C (no pun intended). I cant help with the SAC 305 issues but we should have a wave with SN100 running very soon. I will let you all know how that goes. Please report back on the x-sectioning and share the results. I have heard some v
Electronics Forum | Thu Aug 28 18:48:49 EDT 2008 | markhoch
You're using a SAC305 chemistry? Double check your liquidus temp! Your profile shows a liquidus temp of 217 degrees C. SAC305 is not eutectic. (It doesn't transition from paste to liquid instantly). It goes thru a "pasty" stage. We use a temp of 221
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