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Author Topic: So much for disconnecting the battery.  (Read 3378 times)

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Lawman

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Re: So much for disconnecting the battery.
« Reply #15 on: 09 December 2006, 22:42:52 »
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Most of the boards I work with are pretty bomb proof, not laptops though haha :-/
No electronic boards are immune from ESD ;)


Think about that the next time you get in a lift then Mr TheBoy  ;)
Noooo! Don't say that! ;D

Muahahahaha! ;)

 ::)

Seriously though, I've seen boards stacked then carried and generally roughly handled...they can take it ;)
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Marks DTM Calib

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Re: So much for disconnecting the battery.
« Reply #16 on: 10 December 2006, 10:23:54 »
They might at first....but time will tell.

Seriously, ESD is a big issue, even more so in the modern world of sub micron silicon (almost everywhere now).

In our factories, its a big deal with antistatic floors, footwear and heal straps (wrist straps are rarely used in a production environment) and ESd can build up with just the movement of an arm (hence touching a case before hand its no guarantee...)

The big issue is that ESD can often do un-seen damage which can ause problems later.....like damaging the aparsitic diodes on the IC's I/O, memory is very prone to such damage

It costs big bucks to impliment and follow and buisnesses dont spend money unless they have to...
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TheBoy

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Re: So much for disconnecting the battery.
« Reply #17 on: 10 December 2006, 11:06:47 »
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The big issue is that ESD can often do un-seen damage which can ause problems later
That is the big problemt with ESD - people change stuff without protection, and because it works afterwards, think that its OK.  Its not, and damage would have been done - often resulting in differcult to find intermittent problems.

Also, "it's ok, I held by edge of board" type comments aren't valid either.
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Grumpy old man

Marks DTM Calib

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Re: So much for disconnecting the battery.
« Reply #18 on: 10 December 2006, 15:10:39 »
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Also, "it's ok, I held by edge of board" type comments aren't valid either.

Nope, inner planes extend right to the egde of the PWB....
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Taxi_Driver

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Re: So much for disconnecting the battery.
« Reply #19 on: 10 December 2006, 18:27:15 »
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Also, "it's ok, I held by edge of board" type comments aren't valid either.

Nope, inner planes extend right to the egde of the PWB....

PWB? same as PCB? Last time i worked for a computer manufacturer (along time ago) they were designing PCB's upto 14 layers thick......wonders how many layers you can get to now?  :-/
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