Rick: One approach for determining a cost-effective design of the features of your ESD
work area(s) is to select the features based on the sensitivity classification of the
devices in that work area.  Five classes of sensitivity are:
* Class 0 areas contain devices with ESD withstand voltages ranging from 0 to 199
volts.
* Class 1 areas contain devices with ESD withstand voltages ranging from 200 to 499
volts.
* Class 2 areas contain devices with ESD withstand voltages ranging from 500 to 1,999
volts.
* Class 3 areas contain devices with ESD withstand voltages ranging from 2000 volts and
up.
* Class 4 areas contain no devices that are sensitive to ESD damage

Printed circuit board assembly areas are classified according to the most sensitive
component handled in that area.

An example of the benefits of this approach is:
* Class 2 work benches require dissipative work surfaces.
* Class 3 work benches don't require dissipative work surfaces.

Good luck.

Rich Lasko wrote:

> Good morning technetters:
>
> I am trying to put together a "ballpark" figure regarding the cost
> implementation and maintenance of a "good" ESD program.  By "good" I mean
> one that will satisfy most of the prevention requirements (and customer
> audits) without going "overboard" on ESD prevention and spending thousands
> of dollars on items that are "nice" to have but not really necessary.
>
> We have identified the following main items as needs for this program: ESD
> floor, ESD bins/boxes for components or product, wrist straps, foot straps,
> ESD test kit, ESD mats, ESD packaging.
>
> This program would be implemented at a contract manufacturer's location with
> approx. 47,000 square feet of manufacturing floor space.  From what I
> remember, it is typically the ESD floor protection (wax, tile, or carpet)
> that usually costs the most.
>
> Thoughts on cost?
>
> Thanks!
>
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