Hello,

The following are the replies I got for my posting.


----------------Original Posting------------------------------
Hello All,

Does anybody know the temperature at which a thin film (0.5 um) of Gold
looses its specular property.

In particular, I would like to know the temperature beyond which Gold
looses its good reflectance and becomes rough, for a MUMPS fabricated Gold
on Polysilicon2 layer with a thin Chromium adhesion layer in between.


Thanks,
Vamsee Krishna
Dept of Elec Engg'
Duke University
vkp@ee.duke.edu

-----------------------Responses-------------------------------


>From koester@memsrus.com Tue Jul  6 17:03:06 1999
Date: Fri, 2 Jul 1999 08:01:04 -0400
From: Dave Koester 
To: "'vkp@ee.duke.edu'" 
Subject: FW: Specularity of Gold


Vamsee,

I can't give you an exact number but I believe
the roughening occurs around 250C.

David Koester
R&D Manager

Cronos Integrated Microsystems, Inc.
(A subsidiary of MCNC)
3021 Cornwallis Road
Research Triangle Park, NC 27709-2889
919-248-1493 (ph.)      919-248-1434 (fax)

koester@memsrus.com
http://www.memsrus.com