Electronics Forum: viewed (Page 3816 of 7889)

Re: unsoldered smt board assy shipping

Electronics Forum | Fri May 19 14:33:30 EDT 2000 | Lawrence A. Groves

I did this at one point and found that the handleing is critical. What usually happened is that two of the PCBs would touch and the edge of one would scrape the parts off the other. I tried a couple of different epoxys and ended up with a CIBA prod

Re: Operating a SMT system

Electronics Forum | Wed May 17 21:13:00 EDT 2000 | Dave F

Earl: Two things: 1 You know that I read your articles, because I asked you questions about them and e-mailed you a drawing of a layer stack. 2 You certainly rose to JAXs bait. I believe he may have set the container on the table, while removing

Re: Operating a SMT system

Electronics Forum | Thu May 18 08:35:59 EDT 2000 | Nancy V

Hmmm, I don't think JAX knows Earl very well. He did not need to bait Earl. I don't think he could have resisted that the name was Janet. I am sure he "sensed" that a woman had shown up on the forum :) (Sorry, couldn't resist, Earl) Nancy

Re: Misplaced QFP240 component

Electronics Forum | Wed May 17 03:56:20 EDT 2000 | Wolfgang Busko

Avichai: What kind of PCB are you using, when do you detect that shift (right after placement, before reflow, after reflow), does the shift always appear to be the same or do you see a variation, are you able to identify the process-step where it hap

Re: Misplaced QFP240 component

Electronics Forum | Wed May 17 12:22:54 EDT 2000 | JAX

Ramot, Without further explanation everyone here is just taking stabs at it..... Sounds normal, I'm game! Have you looked at board finish(HASL?)?? Measured paste height?? Are they always off in the same direction? If not, Handling?? What are the sp

Re: Dusted By Dross

Electronics Forum | Wed May 17 10:11:12 EDT 2000 | Boca

Sounds 'on the money'. By gear up, I assume you use respirators. Wipe up any dust deposited on surfaces and dispose of the wipes as lead waste. Keep the cover firmly on the dross can when not in use. You've got it covered (pardon the pun). Do yo

Sensors/Transducers for E-Nose

Electronics Forum | Tue May 16 22:01:36 EDT 2000 | Dustin

Hi .. I'm trying to get into the Electronic Nose field and was wondering if the sensors required for this can be bought and where? I think they call them chemoresistors or something ... they're conducting polymers or metal oxides ... M not so sure ..

Re: Question on ANSI/ESD-S20.20-1999

Electronics Forum | Tue May 16 20:43:22 EDT 2000 | Dave F

Ashok: Hey guy ... snow starting to melt yet? Keeping process insultaors with a charge of over 2kv a foot from ESDS items seems reasonable. The HBM assumes contact with the item, so it should have a lower potential. You should double check with E

Re: Question on ANSI/ESD-S20.20-1999

Electronics Forum | Fri May 26 17:06:21 EDT 2000 | Dave F

Guys: Folk at EOSEAD told me two things on this: 1 Yes "All process essential insulators that have electrostatic fields that exceed 2000 volts should be kept at a minimum distance of 12 inches from ESDS items." is correct. 2 The latest revision to

Re: UniCam Forum

Electronics Forum | Mon May 15 18:06:02 EDT 2000 | Micah Newcomb

Mark, I am not aware of any forum dedicated soley to Unicam, but as Jax said this forum is about as good as any. I am sure there are many Smtneters that use Unicam daily, myself included. We use Unidoc for documentation and we also utilize Fuj


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