Electronics Forum | Fri Oct 14 14:00:35 EDT 2005 | patrickbruneel
Mika, If I understand you correctly you compare hole fill of Ni/Au plated boards in a lead-free process with HASL 63/37 boards soldered with leaded solder. If this is the case you might be facing the challenges in Pb free wave soldering with the lim
Electronics Forum | Tue Aug 01 10:09:52 EDT 2006 | cyber_wolf
Chunks, Make sure your aspect ratio is OK. Normally for an application like this, I would use a .005 foil. The foil material would be invar.The invar has better release characteristics. Crappy solder paste can also cause release issues. I am not sur
Electronics Forum | Tue Aug 01 10:29:43 EDT 2006 | slthomas
It's been a while since I've built with 16 mil pitch, but I have to second the recommendation to go to 5 mil stencils. Night and day as far as release characteristics. The increase in aspect ratio opens up the window a lot. (read = covers up a mult
Electronics Forum | Mon Dec 04 13:02:57 EST 2006 | patrickbruneel
Life after RoHS is a nightmare Delamination is the No. 1 issue in mixed technology. No. 2 is voids due to the inferior wetting characteristics of lead-free alloys compared to leaded alloys. No. 3 is copper dissolution. The full effect of RoHS will
Electronics Forum | Fri Aug 24 15:06:11 EDT 2007 | stepheniii
What kind of boards are they? Unless they are very simple boards, you won't be able to just replace every TH component with a SM equivalent. The inherent LCR characteristics of the board will change I think the normal way would be not to change the
Electronics Forum | Fri Oct 19 17:09:56 EDT 2007 | hegemon
We have both DRS24 and DRS25 Lead Free rework is done for the most part on the DRS25, although the DRS24 can handle some of our smaller pbFree assemblies. We bought the DRS25 machine new, it was not an upgrade. The machine is very successful at pb
Electronics Forum | Fri Nov 16 08:46:30 EST 2007 | jdengler
For very simple boards, 2 layers lightly populated with light thermal mass, we still use FR4. For most of our Pb-Free boards we use the higher Tg material with moisture-resistant packaging. We are a CM so we don't usually get to change many of the
Electronics Forum | Tue Jan 15 08:50:07 EST 2008 | ck_the_flip
Based on past, actual, hands-on experience, I have found that the PCB mask finish makes a HUGE difference in solder-balling. Glossy has different surface tension and peelback characteristics than matte finish (ie glossy sucks). http://circuitsassem
Electronics Forum | Fri Feb 22 12:02:24 EST 2008 | soudomphong
I have been searching for a compatible high temp chain oil other than Tribol 1421/SG due to cost cutting, which is what electrovert is recommending. I was wondering if anybody can tell me beside Tribol 1421/SG. What other brand out there that is come
Electronics Forum | Mon Dec 15 04:21:08 EST 2008 | bejingaf
Hello! I'm interested if anyone did any comparisions now days betwen several AOI types for inline inspection of populated SMT and THT PCB's. I'm mostly interested in multicamera systems ( MIRTEC, LANDREX, ORBOTECH, VISCOM....). I have checked few of
