Louis,

Tacky mats can be used to remove debris from the bottom of street shoes, but
unless you have shoe brushes, none of the dirt is removed from the sides of
the shoes!

Some PWB shops will have you remove your street shoes and put on shop shoes
- Static dissipative and all. 

Our shoe covers have had rubber-like treads with static dissipative sides
and elastic around the top so the shoe debris is more or less trapped
within.  Any of the store-bought uniform dealers/cleaners has them.

What really gets me is to see people coming out of a clean room, clip their
dirty booties on the smock lapels, then hang the assemblage on a hanger or
hook.  So no matter what how well you cover people's dirty shoes, you have
to teach them what not to do with the dirt-filled ditties after they have
worn them.

The slip-on plastic booties don't seem to hold up well at all.  Many tear
during initial installation, or later during use, with the operator not even
being aware of it.

Tacky mats just outside the cleanroom door, and just inside the door will
help remove walk-in debris from the booties.

Check your particulate levels before, during, and after taking some
remediation steps.

Steve

 
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Louis Hart
Sent: Tuesday, March 03, 2009 7:19 PM
To: [log in to unmask]
Subject: [TN] footgear for clean room

TechNetters, anyone have advice about what to wear on the feet in PCB
manufacturing clean room? We've tried various booties which seem to
disintegrate and clog filters. Tyvek booties may be good, but there have
been complaints they are slippery. Thanks for any comments. Louis

Louis Hart
Compunetics
Monroeville, PA
USA
[log in to unmask]<mailto:[log in to unmask]>
412-858-1272


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