Electronics Forum | Sun Jul 15 17:48:51 EDT 2001 | kerryn
You should check the archives, there has been much written on this subject in the past. Asking about the correct chemistry is wise. It never ceases to amaze me how many people think ultrasonics will work without the proper chemistry. Without the rig
Electronics Forum | Tue Jul 31 20:12:01 EDT 2001 | davef
If you've told your experts in Germany and US as little as you've told us, I'm not surprised they don't know dip. Sorry, I just snapped there for a moment. That wasn't politic, was it? Yes, it is possible that the other solder connection on this c
Electronics Forum | Fri Mar 12 13:30:06 EST 1999 | Bill Schreiber
Dear Scott, You are correct in questioning the chemistry portion of the process. However, I am couriuous as to why you selected DEK as a stencil cleaner. The most important part of any cleaning process is always the chemistry. How you deliver the c
Electronics Forum | Fri Mar 12 13:40:53 EST 1999 | Bill schreiber
In a nutshell, you should be looking for a chemistry first, then look for a machine. Hopefully, they will be from the same source. | Dear Scott, | You are correct in questioning the chemistry portion of the process. However, I am couriuous as to w
Electronics Forum | Mon Dec 28 10:17:09 EST 1998 | Earl Moon
| Does anyone have any experience with vibration testing of BGA packages and assemblies? We are starting to design BGA's into some of our products and we have not found very much information on vibrational test results. Any information will be help
Electronics Forum | Thu Aug 06 02:25:21 EDT 1998 | P.L. Sorenson - Technical Consultant
| I am looking for advice or information from anyone about the possible reliability problems associated with epoxy on solder pads of discrete devices. Will the epoxy expand and lift over time, Will there be adverse reaction between the solder and the
Electronics Forum | Wed Apr 01 09:55:24 EST 1998 | Chrys
I started using Ensolv about a year ago. It's the best solvent I've found yet for cleaning uncured adhesive. It's also recommended for board cleaning, although I haven't used it on wet paste. As the name implies, its environmentally friendly with n
Electronics Forum | Sat Jan 24 00:13:57 EST 1998 | Scott
| What is the lifetime for a typical solder paste ? | How long can boards be stacked waiting before the paste goes off ? Lifetime and tack time depends on: - Manufacturer - Flux/mixture - Environmental conditions Typical lifetime is dependent on stor
Electronics Forum | Thu Jan 03 08:32:28 EST 2002 | davef
You're correct. There's a range of issues. Two perspectives are: * TI and other suppliers has been shipping lead-free solderability protected leads on components for years. We have discussed, here on SMTnet, a need to adjust the reflow profile to
Electronics Forum | Wed Feb 26 11:06:27 EST 2003 | slthomas
Always a joy to see a stencil cleaner thread get opened up....lots of varying opinions as to what's needed, best, environmentally sound, etc. We use an ultrasonic batch cleaner that uses a detergent (dilute to 1:10 or 1:20, can't remember), then bo
