Electronics Forum | Thu Sep 10 09:47:15 EDT 1998 | Earl Moon
| hi, | 1206 capacitor with silver/palladium termination is mounted onto a ceramics substrates. Bonding is achieved through conductive epoxy. | We discovered that the epoxy cracked and this caused missing capacitor. We had tried different grade of e
Electronics Forum | Tue Jun 18 05:40:38 EDT 2002 | ianchan
Hi mates, finally! some sense to all this, so this bloke is concerned about "ppm = quality" variations... looking back through all the muck in this thread, last posting before the s**t hit the ceiling was: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Date: June
Electronics Forum | Wed Aug 07 09:05:11 EDT 2002 | davef
N2 PPM vs %RH? With a firm grasp of the obvious, reflow oven manufacturers rig N2 ovens differently than non-N2 ovens. The N2 displaces O2. Usually N2 oven monitor something or other to give an indication of N2 ppm. %RH really isn't part of the eq
Electronics Forum | Tue Apr 29 16:42:29 EDT 2003 | razor
Not to sound too much like a clich� "The solution to pollution is not dilution." I would not be one for adding yet another variable to my solder pot. If your PPM is double digit, control of solder defects can become tedious, who's to say which cause
Electronics Forum | Tue Oct 21 10:24:54 EDT 2003 | russ
Whoever established the PPM rates should tell you what it is covering (solder joints/assemblies) PPM is nothing more than a ratio. Determining quality levels is really up to you/company and how you want to measure your quality. This can be anything
Electronics Forum | Fri May 20 14:43:38 EDT 2005 | jfullerton
billscheu wrote: "just use 63 37 solder for repair. I do not know of any specification which prohibits this and until the people who create the rules change them this is the best." All due respect, but do you know what RoHS is? If you sell product i
Electronics Forum | Tue Jan 03 22:00:32 EST 2006 | fdr4prez
Yes Rick, you are correct, Zevatech HBA, PPM7 & > PPM9 were all designed and built by Swiss. That > was a long long time ago. Sorry, I guess I forgot about those old beasts. Then don't forget about the good old CATs and Microns made by Zevatech
Electronics Forum | Thu Sep 07 07:38:14 EDT 2006 | travis1977
I have experience programming and using the yestech system in a high volume high mix environment. The system seemed to work well until I used a more sophisticated system. When I changed jobs and had another opportunity to spec. in paste and post-r
Electronics Forum | Tue May 12 10:03:12 EDT 2009 | daan_terstegge
Hi All, I see more and more components like QFN or LGA with bottom-only terminations,with landpatterns getting finer all the time. I have no ppm-figures of our process, but based on a benchmark study by Agilent I'd say that 500 ppm is a decent value
Electronics Forum | Thu Apr 29 09:18:54 EDT 2010 | rgduval
If you go with a Quad from PPM, I believe that they've developed a windows interface for the machine. They also have a couple of old Quad people working there for continued support. --I receive no benedits from PPM, but I am a happy customer-- We