Electronics Forum | Fri Jul 13 12:27:30 EDT 2007 | jseagle
As in more dwell? We see the same problem with through holes connected to power or ground planes. The solder reaches the plane and stops. We are having our boards re-designed to increase the thermal relief and expand the hole size. We are also tr
Electronics Forum | Thu Jul 26 08:39:16 EDT 2007 | d0min0
since 1999 we use Heraeus PD944, in time we tested Loctite also but had some issues with it - or with our machine specialist :)) we dispense with Fuji CP (2 , 3 & 4) it only creates problems when its on the solder pads ;-) best wishes
Electronics Forum | Thu Jul 26 16:15:24 EDT 2007 | blnorman
I was looking through a solderability spec and ran across the term Nordau (Terminal finish - 90Sn/10Pb, Nordau, Matte Sn). I've never heard of this finish before, what is it?
Electronics Forum | Thu Jul 26 22:52:56 EDT 2007 | davef
Choices are: * Respin the board to move the via so that it is no longer under the pad. * Have the board fabricator plug and plate over the via. Search the fine SMTnet Archives for background.
Electronics Forum | Mon Jul 30 10:17:26 EDT 2007 | davef
immersion ...easily changes color.. See that's the GREAT thing about immersion coatings. If they change color, they probably will not solder well. Try that with other coatings.
Electronics Forum | Tue Jul 31 13:23:24 EDT 2007 | fastek
Well....I think you can also thank the Chinese and their unbridled appetite for anything metal. It's not only Tin.
Electronics Forum | Wed Aug 01 09:10:28 EDT 2007 | patrickbruneel
Fastek, I just take every opportunity to point out the nonsense of lead-free. In today�s assembly environment the exempt military and hi-rel products are manufactured cheaper than lead-free consumer products. Now does this make any sense to you?
Electronics Forum | Wed Aug 01 10:47:14 EDT 2007 | patrickbruneel
Here's the solution AJ Unfortunately our jobs will go with �IT� http://www.verdantelectronics.com/process.php
Electronics Forum | Thu Aug 02 03:21:52 EDT 2007 | wayne_
Yes, if cost is the concern. You can consider to try other alloys, like SCN from Nihon or SCS from Singapore Asahi, cost is definitely cheaper than SAC and SACX. I think the price is around 15~20 USD per Kg.
Electronics Forum | Thu Aug 02 08:18:14 EDT 2007 | aj
Surely all alloys must be experiencing the same increase rate- with Tin being the main alloy in all Leadfree Bars.