"Single layer thin film capacitor structures were fabricated on the surface of low temperature co-fired ceramic (LTCC) substrates using sputter deposition. The capacitor structures had areas between ~10⁴ µm² to ~10⁶ µm² and featured ~200 nm Al or Pt electrodes with 150-1500 nm Al₂O₃ dielectric layers. Impedance analysis and current-voltage testing were carried out to determine the effect of electrode material and dielectric thickness upon capacitor performance. Capacitance values for devices with Al electrodes ranged from ~10 to ~700 pF, depending on capacitor area and dielectric thickness, and the fit to expected values was better than devices with Pt or mixed (one Al, one Pt) electrodes. Dielectric loss increased with increasing Al₂O₃ thickness, most likely due to cracking in thick (>1 µm) sputtered films. All measured loss values for the sputter deposited Al₂O₃ (tan[lambda]~0.02) were greater than bulk Al₂O₃ (tan[lambda] ~0.001). Transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS) were utilized to examine selected capacitor structures. Electron beam induced crystallization of amorphous Al₂O₃ was observed during the selected area diffraction (SAD) patterns. TEM examination and impedance analysis both confirm that functional capacitors with Al electrodes and 300 - 000 nm thick Al₂O₃ dielectric layers can be fabricated on LTCC substrates using sputter deposition"--Abstract, page iv.
Schwartz, Robert W.
Materials Science and Engineering
M.S. in Ceramic Engineering
Honeywell Federal Manufacturing and Techologies, LLC
Missouri University of Science and Technology
Journal article titles appearing in thesis/dissertation
- Sputter deposition of thin film MIM capacitors for RF bypass and filtering applications
- Electron beam induced crystallization of sputter deposited amorphous alumina thin films
- Effect of electrode material and dielectric thickness on the performance of sputter deposited nano capacitors
x, 57 pages
© 2012 Jack Edwin Murray, All rights reserved.
Thesis - Open Access
Library of Congress Subject Headings
Pulsed laser deposition
Thin films -- Mechanical properties
Print OCLC #
Electronic OCLC #
Link to Catalog Recordhttp://laurel.lso.missouri.edu/record=b9390243~S5
Murray, Jack, "Sputter deposition of thin-film capacitors onto low temperature co-fired ceramic substrates" (2012). Masters Theses. 5294.