Dear friends:

I got a trouble when doing metal lift-off with very small feature size. I
deposited Ti/Au on the patterned PR and then tried to lift off. The feature
size if about 8~10um. But even i soaked it in the acetone for very long time,
the PR still can't be stripped off. It seems the metal not only covered the
top of the PR but also the side wall. I am wondering if you have any idea and
suggestions on how to strip off the PR.

Thank you very much.

Zhiyan