Electronics Forum | Tue Jan 11 11:14:09 EST 2000 | Wolfgang Busko
What a challenge! I think it all depends on the equipment used. Seems rereflow of BGA isn�t that good (see the advices for wavesoldering BGA populated boards). Although you might check for the tacking force by sending a sample BGA board head over thr
Electronics Forum | Wed Jan 05 16:36:54 EST 2000 | Dennis O'Donnell
We've recently purchased a Nicolet Imaging System. There are several brands on the market and some alternatives. From our research we found that you basically get what you pay for. I would plan on spending from 30k to 60k for a good quality system
Electronics Forum | Tue Jan 04 15:38:19 EST 2000 | Pat Pepper
Hi everyone: Our company is trying out immersion white tin for fine pitch assembly with what I would call mixed results. Reflow solder looks very good, but wave solder looks somewhat grainy (this may not be a problem in actuality). We had dewettin
Electronics Forum | Tue Jan 11 10:01:30 EST 2000 | Wolfgang Busko
Hi Pat, we had white tin boards laying around for about 10 month with no extra protection than the plastic bag that they were shipped in. Never thought of using them for there was a relayout planned to fix some serious bugs. But that�s life, relayo
Electronics Forum | Mon Jan 03 11:00:25 EST 2000 | Brian W.
At my last company, we installed in-line testers. They worked very well, but there were some issues to be addressed; 1 - Boards had to be cool enough to go through ICT or we had false failures. 2 - We used no-clean flux...enough said about that. 3
Electronics Forum | Mon Dec 20 08:26:17 EST 1999 | pascal MATHIEU
hello guys ; we are using some standard selective wave soldering unit used in lined ; the drawback of a such machine is 1/the speed which is quiet low (the board is coming on position through the conveyor, then the head delivering the solder moves s
Electronics Forum | Sun Dec 19 08:05:14 EST 1999 | Dave F
Clarissa: We've all done thing on a limited basis, especially on prototype boards, but this doesn't sound like a limited basis, or prototype boards. (And may be I reading too much into this, we all know the frailities of conversing like this.) Thi
Electronics Forum | Sat Dec 18 18:29:16 EST 1999 | M Cox
Clarissa Even with a sound support team, buying used equipment is always risky. Some things to consider 1) Call the manufacturer, and make sure they still support the equipment, Parts and Technical. 2) Look at the machines with somebody who knows t
Electronics Forum | Fri Dec 17 16:07:07 EST 1999 | Alex B
Hi, C.K. Let's assume that your stencil's thickness is in a range 4-6 mil or by other words the height of the solder paste on a pads is the same (close enough to reality) Therefore, for pad's width more than 20 mils(as well as pitch between pads) th
Electronics Forum | Fri Dec 17 08:29:18 EST 1999 | Wolfgang Busko
Hi Chuck, let�s say it the other way round. We use noclean since I can�t even remember without nitrogen and all of our subcons do with no known problems. The processes are adapted to it and no complaints are heard up to now. That is related to our pr
.gif)
