Jeff, my take is that the Ti is oxidizing in the wet nitrogen,  Ti is a
very easily oxidized, in fact it is so reactive that it forms TiN , which
is gold in color, and TiH.  If you want the Ti to remain Ti, then you hade
better use dry helium as the environment, or alternatively a very high
vacuum.  Ti is so reactive that it can be used as a pump in ultra high
vacuum systems.   Hope this helps. Gary

Gary Hillman
Service Support Specialties, Inc.
9 Mars Court
PO Box 365
Montville, NJ 07045
973-263-0640
973-263-8888.



-----Original Message-----
From:   Jeffrey Price [SMTP:price@ece.udel.edu]
Sent:   Wednesday, September 01, 2004 3:04 PM
To:     mems-talk@memsnet.org
Subject:        [mems-talk] Ti Waveguides in Lithium Niobate

Hello,

I am trying to diffuse Ti strips into Lithium Niobate.  The strips run
from approximately 3 -10 um.  After diffusion (which I have run
different permutations ranging from 1-9h and 900-1050C) in a wet
nitrogen environment the waveguides completely disappear.  I know that
the index delta should be approximately .01 so they should be difficult
to see, but I can't seem to see anything at all.  I was wondering if
anyone has had this problem before or can help me find a solution.  Thanks.

Jeff Price
Research Assistant, University of Delaware
price@ee.udel.edu

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