Electronics Forum | Tue Jan 13 01:20:31 EST 2004 | mantis
Hi All, I have seen this issue on a QFP160.Firts of all as previously suggested if the board is wave solderded make sure that you are not seeing topside reflow as the board goes over the wave.Secondly you should verify your reflow profile.I seen this
Electronics Forum | Wed Jan 14 12:38:59 EST 2004 | Chris Lampron
Good Day, I have had a similar situation with a QFP. It turns out that the PCB HASL finish was too thin causing oxidation on the copper. The problem was only evident on the QFP as this part had the smallest deposition of paste (and therefore, flux)
Electronics Forum | Mon Jan 12 19:28:44 EST 2004 | adlsmt
YesTech is new but its the CRTechnology guys and they hired some other Photon guys. So my personal opinion is they know the software end of it with no investment in it and the hardware platform looks good to me but they do outsource it. So they have
Electronics Forum | Tue Jan 13 13:42:45 EST 2004 | Tom Parkinson
We use a MIRTEC high res bench top system and are real happy with the performace. We have used it for both pre-reflow Mainly checking parts and part numbers) and post reflow for everything including solder joints. Easy to program and as you do more
Electronics Forum | Tue Jan 13 02:43:48 EST 2004 | Bryan
Hello all, As everyone knows,for all kinds of reasons we must change the reflow oven from 8 zone to 12 zone,but how?perhaps the easiest way is to buy a new 12 zone oven...however what will you do then with the old 8 zone oven,scrape? is there anyone
Electronics Forum | Tue Jan 13 21:00:15 EST 2004 | davef
This sounds like something the saleman of your new Vitronics oven should be happy to help you sort through. ECD [and probably other profiler supplers] provide software for playing with [optimizing?] recipes. In it, they allow you to select from a v
Electronics Forum | Tue Jan 13 04:35:26 EST 2004 | pablowe
We have done some trials with Lead free which appear to have gone well. We will be introducing a number of new products over the coming months and it is an opportune time to begin using lead free on these products which will be required by law in the
Electronics Forum | Tue Jan 13 20:52:21 EST 2004 | davef
Bismuth Solder alloys * Fatigue life is reduced when soldered to hot air solder leveled (HASL) boards. * Lead from Hot Air Leveling (HAL) coatings can diffuse through the grain boundaries of alloy. * Lead is bismuth alloys can form a eutectic composi
Electronics Forum | Fri Jan 16 15:31:26 EST 2004 | davef
Bill This drives solder suppliers nuts, because it's not analytic: Dross inclusion testing can be conducted on the base solder in the solder pot and the virgin solder. Conduct this test by heating a sample of solder, contained in a clear beaker,
Electronics Forum | Tue Jan 13 16:40:03 EST 2004 | Jacob Lacourse
Hi folks, I have a conformal coating application where I need the coating to be UV stable for a number of years without any crazing or cracking of the coating. I have looked for such a coating and have come up empty handed. Much of the circuit boar
