Pyroelectric AlN Thin Films Used as a MEMS IR Sensing Material

Autor: John H. Goldsmith, Chad M. Holbrook, LaVern A. Starman, Vladimir Vasilyev
Rok vydání: 2014
Předmět:
Zdroj: MEMS and Nanotechnology, Volume 8 ISBN: 9783319070032
DOI: 10.1007/978-3-319-07004-9_7
Popis: The measurement and characterization of reactive sputtered aluminum nitride (AlN) thin films is presented and evaluated as a potential solution for high temperature sensing applications based on its pyroelectric response (PR). This paper provides the PR obtained for our sputtered thin films along with an in-depth film evaluation using X-ray Diffraction, X-ray Photon Spectroscopy, Scanning Electron Microscopy, and Fourier Transform Infrared Spectroscopy to assess the films crystalline orientation and material composition while evaluating surface coatings for maximum infrared absorption. We observed an ~5× PR increase in the polycrystalline AlN films when compared to epitaxial monocrystalline AlN films. A design of experiments was used to help identify the key parameters which play vital roles in obtaining high PR films. Lastly, several MEMS based array concepts are presented for future testing and characterization.
Databáze: OpenAIRE