Jason,

Look at Whitesides publication for improving bond strength with PDMS.
http://gmwgroup.harvard.edu/domino/html/webpage/homepage2.nsf

As far as I know, plasma is supposed to improve the PDMS adhesion to glass
because it activates
the PDMS surface and makes it hydrophilic, but I am not too sure about SU-8.

Jayna



> ATTACHMENT part 3.9 message/rfc822
From: "X J"
To: [email protected]
Date: Wed, 11 Aug 2004 20:13:18 +0000
Subject: [mems-talk] Does water attack the attachment of PDMS?

Dear Colleagues,
I worked on the microfluidic devices. When I use plasma treat the PDMS
and SU-8 (on a glass slide) sample, and try to attach them. The attachment
seems very strong at the beginning. I can even break the PDMS without
getting PDMS detached from the SU-8 layer. But when I inject the water or
put the device into the water for about 24 hours, which is typically my
experiment period, the PDMS and SU-8 are detached from each other. Does
that mean the water is able to attack the bonding between PDMS and SU-8? Do
you have any suggestion on how to improve the bonding?
Thanks a lot!


Sincerely,
Jason



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