Am Mon, 17 May 2004 14:30:35 -0400 (EDT) schriebst du:
Hi,

I also do a in principle similar work. I would suggest:
After 1h @ 60C remove the (half cured) PDMS vom the master. Do the aligning
oft PDMS to the glas. Give the device to oven @ 80C over night. This cause
complete curing and bounding. This works, because after 1h pre-curing there
are a lot of non-saturated bounding capacities on the PDMS Surface. The
bounding is not as strong as with plasma, but more reproduceable (what is
often a problem using cheap plasma sources).

That's how I do my staff and it works fine.
Sorry for my poor english. Please feel free to contact me if you have
further questions.

hth & ng - ThF


> Hi,
> I need to bond PDMS to glass, and i have been having problems with this. I
have
> features on the cured PDMS that have to be aligned under the microscope to
> patterned electrodes (Au/Cr) on a glass slide.
>
> Since i need to align the pattern on the cured PDMS to the electrodes, i have
a
> delay of about 2-5 minutes after i have treated both the surfaces with an O2
> plasma.
>
> I have had better luck when i bond the PDMS with the glass slide immediately
> after plasma treatment of the two surfaces without allignment.
>
> Can anyone suggest a procedure that i can use to obtain fairly good bonding
even
> with the 2-5 min delay after treating the surfaces with an O2 plasma.
>
> PDMS curing recipie -
> 10:1 (sylgard 184 elastomer base: sylgard 184 curing agent)
> cure the PDMS for 1 hr at 60oC in an oven.
>
> Thanks,
>
> Varun Reddy