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Electrical Breakdown and Current Passage in Micro and Nano Scale Spark Gaps

Goshayeshi, Sajjad | 2025

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 57916 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Rashidian, Bizhan
  7. Abstract:
  8. The main objective of this thesis is to investigate the scaling laws of electrical breakdown and the devices that use it as the main current-passage mechanism. To achieve this goal, first, the physical phenomena involved in electrical breakdown and the mechanisms that cause electrical breakdown in different environments have been investigated. It is determined which phenomena become more important with down scaling and which phenomena lose their importance, and how the electrical breakdown mechanism changes based on the importance of these phenomena. In the second step, spark gap switches that use electrical breakdown as the main current-passage mechanism have been introduced, and dependence of their characteristics on various parameters have been investigated. The most important of these changes are the changes caused by miniaturization. Given that today, micro- and nano-scale structures that have a mechanism similar to spark gaps are used for various purposes (such as transistors, diodes, etc.), the behavior of these components at the micro and nano scale has also been precisely investigated and summarized. Since computer simulations are the best tool for characterizing and studyingelectrical breakdown in the next step, the methods and tools that are used to simulate electrical breakdown are listed and summarized. And in the last step, using one of these tools, and considering the behavior of down scaling laws of spark gaps, the effect of adding several down scaled spark gaps in series has been simulated, and it is proved that by serializing several down scaled spark gap instead of using a large spark gap, a higher breakdown voltage can be achieved
  9. Keywords:
  10. Plasma ; COMSOL Software ; Electrical Breakdown ; High Voltage Pulse Switch ; Spark Gap

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