Electronics Forum | Thu Aug 07 16:12:03 EDT 2003 | davef
We have been soldering lead-free components on the products with SnPb solder for 10 plus years. Over those years, TI has shipped 20 billion parts with Pd solderability protection. Turn-up the dial on your oven and push on to other things.
Electronics Forum | Tue Oct 03 17:11:42 EDT 2006 | cuculi54986@yahoo.com
Our board suppliers tell us, there is no specification they use for HASL thickness, other than "coverage". They also say they have very little control over the HASL thickness. This was not an issue for us in the past, until we started using Pb-fr
Electronics Forum | Fri Dec 12 10:00:57 EST 2008 | gregoryyork
Hi Patrick Yes we have some that you cant tell the difference. BUT machine set up and angle are extremely important with Lead Free as is the dosing alloy. Cheers Greg
Electronics Forum | Thu Dec 18 18:21:34 EST 2008 | gregoryyork
Hi Peter Its looks on a par with mine so not bad at all but our alloy is considerably cheaper than SAC305 and significantly shinier We used our 10-75-30-R VOC free flux with topside of 100 - 105C Cheers Greg
Electronics Forum | Thu Dec 11 19:24:55 EST 2008 | gregoryyork
some lead free solders do not flow well and need encouragment. what are you using solder/flux wise and machine/settings including dwell times cheers greg
Electronics Forum | Fri Dec 12 11:58:19 EST 2008 | gregoryyork
Hi Patrick We get this with the right settings in a small machine without Nitrogen Nice picture of yours as well Cheers Greg
Electronics Forum | Tue Sep 16 16:45:44 EDT 2008 | trynders
Thanks for the response! I thought is was odd the component vendor chose SAC for a lead frame finish. I am in the Military world, and things have been difficult to control from a lead-free standpoint. I have not been able to find any studies on SAC
Electronics Forum | Fri Dec 12 11:02:20 EST 2008 | patrickbruneel
Greg, I totally agree with you that machine settings are very important in wave soldering and soldering in general. I disagree that lead free alloys can produce wetting like in the attached picture (leaded alloy). Lead free alloys have a much higher
Electronics Forum | Wed Dec 10 16:15:24 EST 2008 | terryl
on the front end in design, minimize the pth connections to ground planes. this takes alot of work by the pcb designer and the approval of the design engineer. connect maximum of 4 ground planes to pth, minimum 1 plane. use spoked connections. ev
Electronics Forum | Thu Dec 11 07:29:58 EST 2008 | jdumont
I have done a few studies on this issue here. As a result we have increased hole diameter on heavily ground planed pins to a min of .015" over the lead diameter as well as preheating the PCB when hand soldering. I have also had to order the upper pre
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