Try elevating the temperature of the acetone bath by about 10 or 20 degrees
C, and add some agitiation (stirring, shaking) to the bath. Another thing
you can do is to mechanical agitate (scrape periodically) the PMMA film
surface so that you are constantly exposing a fresh undisolved surface to
the acetone. Both these techniques will greatly accelerate the dissolution
process. You also need to refresh the solvent frequently - it will only hold
so much solute! Alternately, try using THF as a solvent.
----- Original Message -----
From: "Hunter, Luke L" 
To: 
Sent: Monday, February 02, 2004 2:44 PM
Subject: [mems-talk] Quickly dissolving thick PMMA


> MEMS folk,
>
> I know that acetone works for dissolving PMMA but is there something that
> will work much faster, maybe 10 times?  PMMA thickness is between 300
> microns and 1500 microns.  Currently it takes 3 days to dissolve 1500
micron
> thick PMMA in acetone.
>
> Thanks
> _______________________________________________
> MEMS-talk@memsnet.org mailing list: to unsubscribe or change your list
> options, visit http://mail.mems-exchange.org/mailman/listinfo/mems-talk
> Hosted by the MEMS Exchange, providers of MEMS processing services.
> Visit us at http://www.memsnet.org/
>