lead free solder again

FB obviously has no clue and won't be told!!!

Whiskers will poke right through conformal coat right above where they are initiating from, but they have difficulty poking back through the conformal coat. Also, the conformal coat yields additional protection from whiskers that have broken off and are just wandering around.

"Joerg" schreef in bericht news:jBTtg.66156$ snipped-for-privacy@newssvr27.news.prodigy.net...

Someone expressed some concerns about TQFP's. I suggested applying some coating on the legs. With a brush. And I don't expect to find a PCB with rubber pads in a hermetically sealed box.

No, but I didn't try deep frying ice cubes either.

Yep, whiskers are growing everywhere these days. If they don't cause a short circuit, they will jam the cooling fan. When they have grown long enough, you can harvest them and knit a nice tie from it. Sheesh.

It figures.

Thanks anyway, Rich

He's exhibiting a dangerous case of 'they must know what they're doing' !

Graham

And they also get very fat if overfed while in coma, even when brain-dead, which conflicts with your premise. And they get very sick and suffer from deficiency diseases if not properly tended. It makes a difference what you're fed, even when you have *no* brain to have emotions, or be confused about your body's actual needs.

Yes, but you've got to throw the raw goods in the hopper, obviously. Your body can't select and use things you haven't supplied. It's very easy to do--hardly critical at all--but you have to supply the basic essentials.

Gee, thanks for the vote of confidence. I spent a few years studying them, and make a modest effort to stay up-to-date.

But, any affect I might show of diet on people's health you'll simply blame on their attitude / emotional health / chakras, etc. Or if a food fails to support health, you'll say it doesn't fill people's spiritual / emotional needs. So it's pointless.

Example: If the body only takes what it needs, how can people ever be poisoned? Not just by lead, or cadmium, but even a large dose of salt--NaCl! Even water!

Lemme guess: These people's state-of-mind makes them vulnerable.

So here's my best shot: Suppose you, Rich, fulfill all your emotional needs, but eliminate all vitamin C from your diet. Subsist on, say, Crisco. Then, three months from now, let's see how many teeth you have left. (P.S. Please don't! Generations of sailors proved the point long ago.)

Best, James Arthur

Hello Ken,

And then it's "whisker meets whisker". Bzzzt .... poof.

My cure for microscopic whiskers/pin-holes on thick film boards...

...Jim Thompson

What makes you think he has any teeth right now?

I've seen the pictures!

Best, James

(Rich posted his grinning mug a ways back, and grinning for good reason, as he was PhotoShopped in between a pair of sightly babes.)

How do you know the teeth weren't photoshopped as well?

"Joerg" schreef in bericht news:rpWtg.66197$ snipped-for-privacy@newssvr27.news.prodigy.net...

are

conformal

whiskers

Look at the bright side. Most adjacent whiskers are on the same net ;)

The downside is, that it can even endanger other equipment that uses lead solder. Imagine whiskers growing out of your RoHS compliant equipment, entering the ventholes of your older non-RoHS stuff. Another KABOOM waiting around the corner...

LOL

You ae incorrect; coatings are unreliable - sometimes they work and sometimes they do not; and the longer one needs reliability, the lower the chances of success.

Mostly in compression, so as it grows, it can puncture almost anything.

What a pity you mock those who actually know what they're talking about! - I hope your TV gets whiskers and burns your house down, then you might not be so free and easy with the sarcastic remarks!

Hello Frank,

Have you dealt with TSSOP packages or even smaller ones?

The real problem will be when a male whisker pokes through and see a stunning female whisker ... :-)

"ian field" schreef in bericht news:T9aug.9427$ snipped-for-privacy@newsfe6-gui.ntli.net...

they

be

Yes, I seriously doubt what Joerg is talking about. And myself, for that matter. But I am confident about my next TV - those manufacturers do know what they are dealing with, and I don't hear them complain.

But, even you would have to admit that most adjacent whiskers are on the same net. So even if they do emerge, most of them will be pretty harmless. The more I'm thinking about it, applying some coating on the edges of TQFP's isn't such a crazy idea. At least it *is* an idea. All I hear from Joerg is complaining about something he has zero hands-on experience with.

"Joerg" schreef in bericht news:eAaug.5812$ snipped-for-privacy@newssvr25.news.prodigy.net...

No, TQFP is the smallest I have used.

Oops didn't think about that. Since I thought they were actually hermafrodites, I suppose this is an advantage ;)

Hello Frank,

How do you know that?

FYI, I work in medical and there are areas where lead is not allowed. My exposure to conductive bonding processes of such devices is about twelve years by now. And we are talking mass production here. Ok, maybe that's not enough by your standards.