Valerie Goss' blog

Had my first EBL (Electron Beam Lithography) pattern developed.  It’s not very pretty, but it here’s a start for my first lift-off!

I used PMMA, polymethyl methacrylate , , which is a resin (resist).  First, I spin-coated a thin film of PMMA on clean silicon.  Next, the electron beam is focused onto the surface, and with nanoscale precision the beam interacts with the resist to interrupt the polymer bonds at specific locations on the sample forming patterns.  After removing the sample from the instrument, and back in the lab, I bathed the sample in a developer solution.  This solution completly disrupts the PMMA bonds and the pattern can be imaged!  

Click here, If you want to learn about PMMA.  This is a friendly website with general information that I found very interesting!

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“Iris, quick hurry! You’ve got to see this!”  I called out to my daughter who flew into the room head first (not so gracefully), and who yelped as she almost crashed into me.  With a whimsical smile, holding my arms out to brace our collision, I asked her to take a look at the similarities between me and Zora in the pics.  She frowned and said plainly, “No…though her eyebrows are neater.”  These words marked the beginning and ending of my Zora look alike status.

Seriously, at our NDeRC meeting, Pat talked about how exposure and active K-12 participation in research is a central theme in our K-12 objectives.  I believe that all in attendance agreed.  I’d like to share one of my favorite passages from Dust Tracks on a Road, 1942.  This book was written by Zora Neale Hurston who was a rich and accomplished twentieth century writer/researcher on African American literature.  I have three of her books in my little collection.  Also, here is a US postal stamp, which commemorates her mastery.  She’s a fun writer to read, and Their Eyes Were Watching God was made into a movie. 

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