Remember that surface topography has a significant effect on contact
angle.  A surface composed a numerous small (micron to nm scale)
protuberances will have a much higher macro scale contact angle than a
flat, smooth surface.  This doesn't change the actual surface energy but
it will affect your measurements.

-Matt

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of amron gary
Sent: Monday, July 31, 2006 6:37 PM
To: General MEMS discussion
Subject: Re: [mems-talk] Hydrophilic or hydrophobic surfaces

Well, I am interested in creating hydrophobic thin
film coatings. After doing some literature search I
found that Fluorination using plasma of C2F2 gas can
create hydrophobic surfaces which will repel water
molecules. I am not familiar with this technolog so I
am not really sure how to proceed.
Once I deposit coating of let's say ZrN, then is there
a way I can make it hydrophobic. usually angle of
contact and surface free energy is used as a
characgerization tool for hydrophobic or hydrophilic
surfaces. Thanks

Gary