Electrohydrodynamic jet printing: droplet to shape writing, and potential applications with 172nm exposure

Maduzia, Joseph Walter

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https://hdl.handle.net/2142/113227 Copy

Description

Title

Electrohydrodynamic jet printing: droplet to shape writing, and potential applications with 172nm exposure

Author(s)

Maduzia, Joseph Walter

Issue Date

2021-07-23

Director of Research (if dissertation) or Advisor (if thesis)

Ferreira, Placid M

Department of Study

Mechanical Sci & Engineering

Discipline

Mechanical Engineering

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

M.S.

Degree Level

Thesis

Keyword(s)

Electrohydrodynamic Electrohydrodynamic-jet (E-jet) Electrohydrodynamic-Jet Printing ink film printing 172nm Exposure Electrohydrodynamics Microelectromechanical Systems MNMS Cleanroom Micromanufacturing

Abstract

Electrohydrodynamic jet printing facilitates the deposition of 500nm-30um droplets with high positional accuracy. The University of Illinois at Urbana-Champaign, UIUC, has developed this technique and shown it has many capabilities. Whether the goal is to pattern biologically active chemicals, draw an etch mask, connect complex geometry microscale wires, or one of many other applications, EJET has a place in R&D. Significant effort or training is required to write 500nm-30um droplets, let alone to coalesce droplets into shapes/lines. This thesis includes work to identify how to go beyond the droplet to develop reproducible printed lines and shapes. A detailed procedure for use of the EJET instrument, as well as a qualitative explanation of the EJET process is detailed here. Surface charge dissipation and sample surface preparation were key factors to transition from droplet to line/area writing. Lessons learned for future generations of EJET researchers are documented here. The EJET was used to print inks that were solidified by a novel technique for interesting applications in microfabrication. First chemical compatibility was tested with the solidified ink. Then, the application of the solidified ink as a metal film etch mask and a CF4 isotropic etch mask were explored. With the combination of EJET understanding and this new ink solidification technique, there is a whole new world of potential EJET research.

Graduation Semester

2021-08

Type of Resource

Thesis

Permalink

http://hdl.handle.net/2142/113227

Copyright and License Information

Copyright 20210 Joseph W Maduzia

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