Michael,
Back when I used to design coin operated games we had a
problem with intentional ESD doing damage to the
electronics.
Turns out, that ESD would, every now and then, give a free
game. Being rewarded with free games, they quickly learned
a damaging ritual - the kids would link arms, up to six of
them, scuff their feet around the carpeting and then
discharge to the machine through a quarter to really blast
the machine. More than likely they killed the machine, but
what did they care?
First thing I did was make the electronics extremely robust
for ESD, *THEN* I modified the software so the slightest
(interpret that to mean so low level that it wasn't
damaging) ESD event simply reset the game, even erased
accumulated games. They lost their money. Never had
problems after that. The next time we watched a field
installation, you couldn't believe how the kids protected
those machines from even the most accidental of discharges.
Like yelling at another kid to keep away while he's
playing the game.
Anyway, it was one way to get the customer to help protect
your electronics. It's all in the reward/punishment
system.
- Robert -
Robert A. Macy, PE .. m...@california.com
408 286 3985 . . . .. . . fx 408 297 9121
AJM International Electronics Consultants
101 E San Fernando, Suite 402
San Jose, CA 95112
On Wed, 3 Sep 2003 10:31:58 -0500
"Sosnoski, Michael" <gl...@wmsgaming.com> wrote:
>
> Ladies & Gentlemen,
>
> I am wondering if you have ever heard or know of any
> printed circuit board
> conformal coatings that are better than others for
> protecting against ESD?
> Are some just better than others for anything?
>
> Not that we don't use proper grounding, shielding & board
> layout techniques,
> but this industry is concerned with deliberate, and
> intentional
> stimuli to the equipment, and the more robust I can make
> the boards,
> connectors, etc,.. the better. Also, as in any
> commercial industry--the
> accountants....
>
> Thanks,
> Mike
>
>
>
>
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