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Field emission properties of ring-shaped Si ridges with DLC coating

  • We report on the fabrication and the emission characterization of single ring-shaped Si ridges with a coating of diamond-like carbon (DLC). The reactive ion etching and the subsequent inductively coupled plasma step were adjusted to realize ring-shaped Si ridges with a height of 7.5 μm respectively 15 μm and an apex radius of 20 – 25 nm. The samples were coated with a DLC layer (thickness ≈ 2 – 5 nm) by a filtered cathodic vacuum arc deposition system in order to lower the work function of the emitter and to improve the field emission characteristics. The field emission characterizations were done in diode configuration with cathode and anode separated by a 50 μm thick mica spacer. A higher emission current was carried out for the ring-shaped Si ridge in comparison to the point-shaped Si tips due to the increased emission area. The highest emission current of 0.22 μA at 1000 V was measured on a DLC-coated sample with the highest aspect ratio. No degradation of the emission current was observed in the plateau regime during a measurement period of 6 h. Finally, no decreasing performance of the field emission properties was found due to changes in the geometry or destructions.

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Metadaten
Author:Christian PrommesbergerORCiD, Robert Damian ŁawrowskiORCiD, Christoph LangerORCiD, Mirgen Mecani, Yifeng Huang, Juncong She, Rupert SchreinerORCiDGND
DOI:https://doi.org/10.1117/12.2265627
Parent Title (English):Proc. SPIE 10248, Nanotechnology VIII, 102480H (30 May 2017)
Publisher:Society of Photo-Optical Instrumentation Engineers (SPIE)
Editor:Ion M. Tiginyanu (Ed.)
Document Type:conference proceeding (article)
Language:English
Year of first Publication:2017
Release Date:2021/05/31
Tag:Carbon; Etching; Mica; Oxides; Scanning electron microscopy; Silicon carbide
Volume:102480H
Konferenzangabe:SPIE Microtechnology, International Society for Optics and Photonics, 2017, Barcelona, Spain
Institutes:Fakultät Angewandte Natur- und Kulturwissenschaften
Fakultät Angewandte Natur- und Kulturwissenschaften / Labor Mikrosensorik
research focus:Sensorik