Electronics Forum | Wed Dec 10 00:15:07 EST 2008 | jeffjarmato
Are there any good solutions for getting good barrel fill on PTH boards using Pb Free solder and No Clean flux. All of our boards are having issues getting minimum required fill per IPC. It does not matter if the board is 062 or thicker, any pin conn
Electronics Forum | Wed Dec 19 09:41:14 EST 2012 | dyoungquist
What is your solder pot temperature? We found that on a 0.093" multilayer board increasing the temp of the lead free solder from 300C to 315C helped with the barrel fill.
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 09:32:57 EST 2008 | patrickbruneel
Greg, You say �some lead free solders do not flow well� Are there lead free solders that flow as good as conventional leaded solders?
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 | 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 | 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 | Tue Dec 18 10:14:14 EST 2012 | moshesh
In those cases where we have a 3.2mm thick, 16-layer board with several GND layers, do we still need ground connection to each and every layer (with thermal relief) or, skip part of the ground patterns? Will it help soldeing rising. I can't reach mor
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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