Subject: Question about the selectivity between ZEP520A (or 5% 950K PMMA) and KOH(30%)
From: Donkoun Lee <>
Date: Thu, 07 Oct 2010 22:11:40 -0700

Hi all:

Dose anybody have experience of the e-beam process with ZEP520A (or PMMAA)
followed by the KOH wet etching process? If you have, may I share the

Thank you.
Kind Regards,
Donkoun Lee

Donkoun Lee
Ph.D Candidate
Prof. Shan X. Wang's Group
Dept. of Materials Science & Engineering, Stanford University
McCullough Building, Rm 208, 476 Lomita Mall, Stanford, CA, 94305-4045

Office: (650)-723-2939
Fax: (650)-736-1984