There's also the (remote) possibility that you can use piranha. It doesn't attack gold or chrome very quickly. It will, however, eat aluminum like crazy, and it may attack the adhesion layers you used. What is directly underneath the PR? Those heated strippers do work pretty well. I've used Baker ALEG-355 at 80C, and it cleaned hard-baked PR off well enough for a PECVD system to work. my 2cents, Jesse Fowler Sven HolmströmSent by: mems-talk-bounces@memsnet.org 12/22/2005 03:13 PM Please respond to General MEMS discussion To General MEMS discussion cc Subject Re: [mems-talk] Removing dry resist Thanks for the answers. Most of you say Oxygen plasma, which we have been thinking of too. But as of now we don't have that available locally (we could send it away though, for certain cost). On 12/22/05, Shile wrote: > Try a photoresist stripper. I'm not aware of acetone as an ingredient > in any commercially made resist stripper.