Electronics Forum | Fri Oct 01 01:27:58 EDT 2021 | sn
Hi Davef, thank you for your information.
Electronics Forum | Fri Oct 01 03:16:39 EDT 2021 | sn
thank you for your information.
Electronics Forum | Thu Oct 02 12:22:26 EDT 2008 | JerryS
Hello Ok there is not much info here. What you have to mae sure of is several key factors. 1. Have you entered the correct stencil thickness. 2. Are you using the stencil gerber (not the paste layer) The paste layer is usually not adjusted for ap
Electronics Forum | Tue Jun 01 17:37:34 EDT 2004 | lynnmc
Any view on what the minimum reflow temperature is for a SAC ball bga to form a reliable joint with PbSn solder?
Electronics Forum | Thu May 06 08:59:25 EDT 2004 | davef
Even with PbSn solderpaste the leadfree BGA's have a superior resistance to solder-joint fatigue failure when compared to conventional parts. [Solder Fatigue Reliability Issues in Lead Free BGA Packages, Pedro Chalco of IBM, Pan Pacific Microelectron
Electronics Forum | Thu Oct 02 01:47:57 EDT 2008 | myleb
I'm new to SMT. Now, i'm making program for SPI machine to inscpect for solder paste of SP60-MU. I think this is a very good printer but some times, my program shows only 50-60% of volume transfer; and the average height is very high: nearly 200 pct.
Electronics Forum | Tue Jun 01 19:25:19 EDT 2004 | Ken
...oops part 2: I will assume a sac 350 ball??? 217-218C this will completely reflow the ball and form a "normalized" joint with a collapsed structure.
Electronics Forum | Thu Sep 23 12:49:25 EDT 2021 | davef
Several articles in a recent SMTnet Express Newsletter [https://smtnet.com/express/index.cfm?fuseaction=archives&issue=20210909] addressed topics of your question.
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 | Tue Oct 05 12:46:02 EDT 2021 | emeto
From what I understand SAC305 and SAC405 are considered low silver content and have the better overall mechanical qualities compared to more silver or no silver.
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