Ellipsometry would be the most appropriate.
Some vendors might do a sample gratis, but you'd need to ask.
Hope this helps.
Jim

-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Aashish Singh
Sent: Monday, January 03, 2005 8:14 AM
To: [email protected]
Subject: [mems-talk] measuring film thickness and Refractive index after
spin coating



Dear friends,
  I have spin coated a thin Layer of PMMA over Quartz block in my laboratory. I
want to measure the film thickness and Refractive index, can anybody suggest
some way of doing it.
   Your help will be heartly appreciated.

regards
Aashish Singh
Project Associate
Department of Physics
Indian Institute of Technology, Delhi
New Delhi-16
INDIA
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