I think methylene chloride also works well.
My advice is to put both components into a bottle,
and roll the bottle overnight. The polycarb dissolves and
the polymer 'relaxes' in the solvent making a thin film easier to obtain. I
would Not suggest doing a 5-minute dissolution and then using it.

Good Luck.


-----Original Message-----
From: mems-talk-bounces+jclements=eriesci.com@memsnet.org
[mailto:mems-talk-bounces+jclements=eriesci.com@memsnet.org]On Behalf Of
PINEDO Tatiana
Sent: Monday, June 07, 2004 5:41 AM
To: 'mems-talk@memsnet.org.'
Subject: [mems-talk] Thin films of polycarbonate


Dear mems-researchers;

I would like to spin coat thin films (about 100 nm thick) of polycarbonate
(Bayer MAKROLON CD2005) on a silicon substrate using cyclohexanone as
solvent.
As I have problems to dissolve the polycarbonate in cyclohexanone, I have
some questions to ask:

- Firstly, do you know what can I do to obtain a homogenous solution with
this solvent?
- Secondly, does a better solvent than cyclohexanone able to dissolve the
polycarbonate exist?
- Finally, do you know if a commercial solution exist such as polycarbonate
already dissolved in a solvent (which solvent?) for  spin coated thin films?

Thanks a lot.

Yours sincerely,

Tatiana Pinedo


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