Hi Everyone,
I am trying to make multimode waveguides using spin-coated PMMA as
cladding and SU-8 as core material. I do not have much experience with
SU-8 and I would like to know if there is a selective etchant that will
not attack the PMMA cladding, while etching the unexposed SU-8 layer. Any
recommendation will be of great help.
Thanks,
Lidia