You might want to investigate the use of overhead ionizers in the area to
neutralize the static charges. You will reduce the contamination along with
the static charges

Al Cash

Original Message-----
From: Chuck Brummer [mailto:[log in to unmask]]
Sent: Tuesday, December 21, 1999 4:29 PM
To: [log in to unmask]
Subject: Re: [TN] Relative Humidity


For what purpose?

In my photo print area, we make flexible printed circuits, I keep it between
40 and 50
% RH to keep the photo tools stable.  In my lamination lay up area I try to
keep it
between 30 and 35% RH because polyimide absorbs moisture very quickly
altering the
dimensional stability and causing adhesion problems.  If you drive it down
too low you
get contamination from the static attraction.

Chuck Brummer
Acuson
818.734.4930

West, Jim wrote:

> Hi Everyone,
>
> What is everyone keeping the RH in your facility?  What does everyone
> recommend, or what is the standard if any?  What are the down sides to low
> RH as well as high RH.  Your opinion is greatly appreciated.
>
> Thanks,
> Jim
>
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