Electronics Forum | Mon Nov 19 21:42:51 EST 2007 | jwsmt
I'll e-mail pics to you. Answers to asumptions: * Flex in end-item use was measured at 410 microstrain * Supplier PPM last 12 mos less than 1 * Part goes through 2 reflow cycles; once on top and once on bottom * ICT microstrain was 1365; reduced to
Electronics Forum | Fri Nov 16 08:22:03 EST 2007 | ck_the_flip
For those of you who've completely switched to Pb-Free or who're running in a mixed environment, are you also buying or specifying the "RoHS PCBs" - the ones with * Greater Tg (glass transition temperature) * Thru-holes with limited drill hits and
Electronics Forum | Mon Nov 19 17:40:38 EST 2007 | bbarton
No, the thicker plating and need for very high quality drilling and plating is DUE to the higher copper dissolution rate and higher contact time. As to the Sn100C material, their claims seem to confirm a "lower" copper dissolution rate, but so does A
Electronics Forum | Mon Nov 19 11:14:22 EST 2007 | taintedone
I am currently looking at selective solder machines. The two that i have looked at are the KIss 104 and the APS Novastar SP A400. Both machines are in the price range i need to be in. There are very different from each other as far as how they do the
Electronics Forum | Tue Nov 20 15:06:34 EST 2007 | solder_master
I looked at the Kiss104 and the SPA-400 at the SMTA show in Orlando. I spent an hour with the ACE rep, and walked away totally confused as to how the machine is programmed. I spent 10 minutes with the rep from APS Novastar, and using their Photoscan
Electronics Forum | Tue Nov 20 11:01:05 EST 2007 | dstevenson
Is anyone using a laser to selectively solder components to a board? I'm just starting to research selective soldering methods for the company i work for as we're looking to replace our current hand soldering processes for lead- and lead free- produ
Electronics Forum | Wed Nov 28 17:02:28 EST 2007 | joeherz
We use TraCon's TraBond 2112 for staking applications where larger gaps are involved. It is formulated for PCB staking applications. The material is very low sag and high viscosity. It's 2part and comes in handy bi-paks. Work life is 20-30min.
Electronics Forum | Wed Nov 21 10:15:53 EST 2007 | davef
On one hand, maybe National Aeronautics and Space Administration standards are a good starting point to establish standards for ruggedized manufacturing practice. Look here: http://workmanship.nasa.gov/wkstds_nasa.jsp On the other hand, as you say
Electronics Forum | Fri Nov 23 12:50:27 EST 2007 | bbarton
Do you have any input as to the vibrations seen on the end-use device? Types of device(s) that have solder joint failure? How many thermal cycles the PCB goes through before failure? There are several areas in production of the board that could be th
Electronics Forum | Wed Nov 21 15:37:46 EST 2007 | afm
We have been looking for an old machine (budget issues), and we have foud Juki 570L and Quad IVc to be around same cost. I have found some comments on the forum for the Quad (good in general), but not too much for the Juki. Beside the expected issues
