Hello all,

Recently I have been working on the SU8 50 and SU8 2050.
I noticed that the sidewalls exhibit porous-like texture.
The SU8 50 was expired a year ago but the SU8 2050 is fresh.
I am wondering is there anyone notice about this?
Is it the nature of SU8 or some process steps I can do to eliminate this
problem?
Thanks,


Jason