Dear all:

A flat surface of polyimide layer is found after spun some liquid polyimide
over a substrate.
Can anyone suggest me atleast a way that can help me make a change in that
surface, so that it would no longer be flat, rather something like a lot of
ripplings with a desired dimension. Each ripple should have dome-shaped pick,
and the joint of two ripples should be down very near to the bottom surface
of 2mu thin polyimide layer.
I would be help.

Thanks
Habib
Alberta, Canada