Hello,
I am wondering if anyone knows whether the refractive index of SU 8-2000 at 1550
nm wavelength (or 850 nm) will increase or decrease after cross-linking (i.e.
after post-exposure-bake/hard bake)? I would definitely appreciate it if some
references can be given as well. I checked with MicroChem but they had no idea
about the optical properties... Thank you very much!

Best regards,
JJ Hu