Etching ASML targets with amtetcher
bwchui at yahoo.com
Thu Jul 7 18:37:03 PDT 2011
I did a 5.4 minute (recipe 4) etch on the AMT yesterday (July 6) and got an etch depth of 0.16um per Zygo.
--- On Sun, 7/3/11, Nahid Harjee <nharjee at stanford.edu> wrote:
From: Nahid Harjee <nharjee at stanford.edu>
Subject: Etching ASML targets with amtetcher
To: amtetcher at snf.stanford.edu
Date: Sunday, July 3, 2011, 6:21 PM
Hi amtetcher community,
Have any of you recently used amtetcher to successfully etch ASML targets? The recommended process is 5 min of Program 4. In November 2010 when I last ran this process, it yielded trench depths of 1150 A (measured with zygo) which is close to the desired 1200 A. However, when I ran it again yesterday, the trench depths were only 700 A. Have others also noticed this large change in etch rate?
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