Electronics Forum | Fri Dec 13 10:23:55 EST 2002 | davef
Bright ideas??? Bright ideas!!! I got bright ideas. In order of decreasing luminosity: * Stop installing the socket, solder the PLCC to the board, dip the board. The socket is a waste of time and money. You never replace the PLCC in the field, a
Electronics Forum | Thu Apr 03 11:57:38 EST 2003 | davef
R4: We see the ball left on the PCB with a flat top and the BGA pad appears to be virgin. D4: Not good. The flat top indicates that the ball melted at one time or another. This pad and ball have seen at least two solder cycles with solder and flux. S
Electronics Forum | Fri May 02 16:58:39 EDT 2003 | swagner
We have been building with flex circuits for nearly three years now, its an automotive product utilizing lead free paste, I will give you a few pointers. 1. Evaluate your supplier carefully, make sure you have some kind of stretch tolerance on the p
Electronics Forum | Sat May 10 12:58:33 EDT 2003 | stefwitt
I find 100 feeder slots of 16 mm width quite sufficient. If there are two feeder tables, each table is ~ 36� wide. Even slow machines can travel that distance in less then 1.5 seconds. If I further assume, that an optimized set up may save 30-40 % o
Electronics Forum | Garth |
Wed Jun 04 12:23:05 EDT 2003
Electronics Forum | Fri Oct 17 20:56:37 EDT 2003 | Mike Konrad
First, I should state that my company manufacturers batch and inline de-fluxing systems. Because we manufacture both formats, we remain unbiased. In fact, it is in our best interest to recommend inline cleaners since they sell for considerably more
Electronics Forum | Thu Oct 30 21:55:27 EST 2003 | johnwnz
Now I've checked the archives on this and found the starts of an answer but not much else, but then that posting was a while ago and I though there would be some more data now. So here's the question: who, if anyone is placeign Pb-free BGA's (ideally
Electronics Forum | Thu Nov 13 17:18:11 EST 2003 | davef
First, don�t get distracted by �OA� and �NC� formulations. This is nomenclature. We want to discuss the issue of �activity�. J-STD-004 "Requirements for Soldering Fluxes" classifies fluxes by their chemical composition, activity level and halide c
Electronics Forum | Thu Jan 08 16:16:09 EST 2004 | Dean
My first concern would be the choice of solder paste you have. There are better chemistries out there that far exceed the capabilities of the 609 2. Yes, the part will partially float on the solder (assuming plastic qfp). Cross sectioning would sho
Electronics Forum | Wed Jan 28 10:56:31 EST 2004 | russ
the reason you don't want to use PPM is exactly the reason you need to. You cannot compare a square 1" block to a multi faceted custom machine part. In SMT assembly you will usually find that all 0603 and larger discreetes,25mil pitch, etc. are pro
