Electronics Forum | Tue Jul 26 05:57:27 EDT 2005 | GS
Why you do not try by yourself ? Run some BGA reflow with and without N2 then X-ray the solder joints. Regards GS
Electronics Forum | Mon Sep 19 09:08:25 EDT 2005 | siverts
Search the SMTnet archives first. Ex. http://www.smtnet.com/Forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=8877&#Message35126
Electronics Forum | Wed Nov 09 09:41:44 EST 2005 | chunks
Wetting with lead free at wave is a bit different. You may need to increase your flux parameter to gain top side wetting. May get rid of the voids too.
Electronics Forum | Thu Dec 08 22:47:32 EST 2005 | davef
Satisfactory solder paste should: * Be aligned with all pads * Conform to the stencil pad-aperture size * Have a smooth, flat void-free surface
Electronics Forum | Tue Feb 07 16:45:32 EST 2006 | Mike
Can someone point out what sort of defects at the joint I can expect if solder is above liquidus for 3-4 minutes rather than the typical 1 - 1.5 minutes. Voids? Grainy joints? Poor wetting? Thanks
Electronics Forum | Tue May 02 07:56:58 EDT 2006 | billyd
Yeah, that's what I'm doing now. I have it now peaking around 235, with about 70 sec. above 220C. (220C is the reflow temp, according to manufacturer. I've always used 217C for Pb free) Wish me luck. Thanks!
Electronics Forum | Mon Jun 12 10:34:06 EDT 2006 | cuculi54986@yahoo.com
My brother-in-law is a DDS and I trust him. We had some problems with solder voids in the past, and he was invaluable. He'd drill them out and fill them with SAC3240X+.
Electronics Forum | Fri Jul 28 08:46:36 EDT 2006 | davef
Two lines of thought are: * That you have some solder connections points us towards components. It seems like the solderability protection on some components need to have the reflothermal recipe tailored for that component. * Paste selection is a BI
Electronics Forum | Wed Oct 04 16:18:06 EDT 2006 | cw
My Peak ~ 228-230C (customer wants to see this temperature). solder ball size - 20mil diameter Please advise ASAP. Thanks a lot!!!
Electronics Forum | Wed Oct 04 16:19:54 EDT 2006 | russ
you may want to try a different MFGR of paste, this does help on many occasions. Russ
Reflow ovens for automated SMT PCB assembly, specializing in lead free processing and nitrogen reflow. The best convection reflow ovens on the market.
4 Vreeland Rd.
Florham Park, NJ USA
Phone: 973-377-6800
