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Deposition Methods and Thermoresistive Properties of Vanadium Oxide and Amorphous Silicon Thin Films

Zou, Mengyang
http://rave.ohiolink.edu/etdc/view?acc_num=dayton1446477859

Abstract Details

2015, Master of Science (M.S.), University of Dayton, Electro-Optics.
Microbolometer IR imagers consist of an array of thermally sensitive pixels that change resistance as infrared radiationn is focused onto the array. Commonly used thermoresisitive materials are amorphous silicon (a-Si) and vanadium oxide (VOx). Despite their use in image sensors, these films are extremely difficult to produce with widely varying process conditions being reported in the literature. Therefore, the goal of this work was to examine the process windows of some of these methods, including novel approaches such as oxygen ion assisted deposition (IAD), aluminum-induced crystallization and glancing angle deposition. Among the thermoresistive materials, vanadium oxide has been widely used in microbolometers due to their excellent thermoresistive properties, relatively fast thermal time constants and high temperature coefficient of resistance (TCR). In our work, we examined different physical vapor deposition methods including: RF reactive sputtering of metallic vanadium to produce vanadium oxide, thermal evaporation of vanadium films and subsequent oxidation, and Oxygen Ion-Assisted Deposition (IAD) of e-beam evaporated vanadium. In addition to VOx, amorphous silicon, is also desirable because it can be easily integrated into the CMOS fabrication processes more than VOx. The hydrogenated amorphous silicon produced by PECVD has a high TCR and a relatively high optical absorption coefficient. In addition to PECVD, we used a glancing angle deposition and also examined a novel approach to create polycrystalline silicon from aluminum-induced crystallization.
Andrew Sarangan (Advisor)
83 p.
Engineering

Recommended Citations

Citations

  • Zou, M. (2015). Deposition Methods and Thermoresistive Properties of Vanadium Oxide and Amorphous Silicon Thin Films [Master's thesis, University of Dayton]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1446477859

    APA Style (7th edition)

  • Zou, Mengyang. Deposition Methods and Thermoresistive Properties of Vanadium Oxide and Amorphous Silicon Thin Films. 2015. University of Dayton, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=dayton1446477859.

    MLA Style (8th edition)

  • Zou, Mengyang. "Deposition Methods and Thermoresistive Properties of Vanadium Oxide and Amorphous Silicon Thin Films." Master's thesis, University of Dayton, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1446477859

    Chicago Manual of Style (17th edition)

dayton1446477859
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This open access ETD is published by University of Dayton and OhioLINK.