Gary,
I don't know what your coating is so it is hard to analyze your problem. It
might be film thickness if the coating is transparent to visible light in
the thickness range or oxidation or other contamination (on Titanium for
example )
Shay

-----Original Message-----
From: [email protected] [mailto:[email protected]]
On Behalf Of amron gary
Sent: Tuesday, July 11, 2006 1:57 AM
To: [email protected]
Subject: [mems-talk] Blue color on some parts

Hello all,

We work in decorative hard coatings on 3D objects. I am having two problems:

1. I am seeing some blue color on some portions of the parts whereas rest of
the parts on the turntable look fine. Any suggestions???

2. Also, some of the parts even do not get any PVD coating whereas other
parts on the same turntable get PVD coating fine. Any suggestions to solve
these two problems in my Arc Evaporation PVD system. Thanks in advance.