Leland,

If it is of any support, the 15-20% in Winter months may contribute to
ESD related problems.

We try to keep a Microelectronics clean room environment in the 30-40%
range.  Dryer than this and we get [more] static, wetter than this and
we think of corrosion, etc.

Although not directly related to the screening operation, if you do the
entire facility, there may be the ESD benefit.

Steve

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Leland Woodall
Sent: Wednesday, October 08, 2008 2:11 PM
To: [log in to unmask]
Subject: [TN] Controlled RH% Versus Screenprinting Results

Technetters,

A couple of folks in our firm are investigating several different brands
of humidification systems for possible installation at our facility.
These things aren't cheap, and can run close to 500K.

We see seasonal variation within our building of 15-20% in the winter
months, and may go as high as 55-60% in the summer.

Our paste manufacturer states their optimum printing parameter to be
50-60% RH.  Our process engineers think we'll see a vast improvement in
our screenprinting process if we pursue this project.

I'm trying to understand if this is really going to reap the rewards as
anticipated.

Does anyone have any prior experience(s) they might share?

Thanks in advance for your help!

Leland

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