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PhD Final Oral Examination – Bill Cowell


Tuesday, April 17, 2012 2:00 PM - 4:00 PM

Electronic Device and Nanolaminate Application of Amorphous Metal Thin Films
The objective of this dissertation is to develop amorphous metal thin films (AMTFs) for two-terminal electrical device and nanolaminate applications. Two AMTFs, ZrCuAlNi and TiAl, are investigated in both two-terminal electrical device and nanolaminate applications. Material properties including composition, atomic order, surface morphology, surface potential, and electrical resistivity are explored. Application of AMTFs as electrodes in tunneling MIM diodes leverages the ultra-smooth surface morphology which results from AMTF amorphous atomic order. An analysis methodology of tunneling MIM diode I-V characteristics is described. The described analysis methodology is applied to tunneling MIM diode I-V characteristics with differing insulator thickness, lower electrode material, upper electrode material and upper electrode deposition technique. The presented I-V characteristic analysis illustrates that tunneling MIM diodes fabricated with AMTF lower electrodes are possess tunable I-V characteristics. Nanolaminates are layered materials fabricated with alternating thin-film layers. The flexibility of AMTF nanolaminates is illustrated through the presentation of nanolaminates fabricated with differing AMTFs, oxides, and processing parameters. The application of AMTFs in nanolaminates provides a path towards the fabrication of materials possessing anisotropic dielectric properties. Nanolaminates fabricated with ZrCuAlNi or TiAl AMTFs and aluminum phosphate oxide (AlPO) glass are fabricated. Material analysis and polarized reflectance measurements are presented to illustrate the anisotropic dielectric response of the nanolaminates.

Major Advisor: John Wager
Committee: Douglas Keszler
Committee: Thomas Plant
Committee: Ethan Minot
GCR: Roger Nielsen


Kelley Engineering Center (campus map)
1005
Shannon Thompson
1 541 737 7234
shannon.thompson at oregonstate.edu
Sch Elect Engr/Comp Sci
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