Dissertation > Excellent graduate degree dissertation topics show

Study on the Laser Induced Plasma in the Laser MicroMachining

Author: FanYongFa
Tutor: QinShuiJie
School: Guizhou University
Course: Theoretical Physics
Keywords: Laser-induced plasma Laser Micro machining Dynamic investigation Spectral investigation
CLC: O532.25
Type: Master's thesis
Year: 2006
Downloads: 191
Quote: 0
Read: Download Dissertation

Abstract


The ability to fabricate micro and nano size channels and cavities will be important for the advancement of fluidic systems that are useful to improve performance and to add new function to applications such as chemical, blood, DNA, and environmental science analyses.There are two methods to fabricate micro channels: Using a Q-switched Nd: YAG laser (1.064μm, 100-200ns) The microchannel was fabricated by the thermal-induced process and the plasma-induced process, respectively, in quartz substrates. The plasma-induced process is using the higher energy of the plasma induced from quartz to drill hole on quartz through controlling the lifetime of the plasma.The length of the microchannel fabricated by plasma-induced process is not more than 4mm,which restrict the application in MEMS. This dissertation was started with the mechanism of induced plasma process, analysis the phenomenon of plasma induced by ND: YAG laser. The impact between the electromagnetic wave and the plasma was investigated because the laser is a wave, the plasma spectrum and plasma images was researched, at last, some rule of the electron temperature and the electron density was found, and obtain some available result.Based on the microwave technique about the plasma induced by microwave, It found the method to improve the lifetime of the plasma in the hole, so the length of channel using the plasma process is increase.In this dissertation, the laser-based micro and nano channel fabrication technique is fast and inexpensive, and will enable flexible fabrication of various kinds of 3-D micro fluidic systems and lead to new applications of MEMS in biomedical engineering.

Related Dissertations

  1. Optical System Research of Excimer Laser Micro-Machining,TG665
  2. Study of Photothermal Actuator Technology and the Development of Micro Photothermal Drive Mechanism,TH703
  3. A Study on the Conditions of Common Verbs with Objects for Chinese Acqusition,H146
  4. Image processing based on phase unwrapping laser plasma shock wave interference fringes,TN249
  5. Mechanical Action Analysis and Numerical Simulation of Laser Plasma to Solid Target,O539
  6. Studies on Microwave Interference and Microwave Diagnosis of Laser-induced Plasma,O534
  7. The Study on the Threshold Characterization for Laser Penetration Welding,TN249
  8. Laser Welding of Zinc-Coated Steels with Filler Powder,TG456.7
  9. Study on the Process and Mechanism of Excimer Laser Micro-Machining,TG665
  10. Laser Welding of the High Strength Aluminum Alloy in T-Joint,TG456.7
  11. Studies on Shock Mechanisms of Propagation and Attenuation in Laser Propulsion,TN241
  12. Studies on Characteristic of Laser-induced Plasma Shock Wave Evolution and Cavitation Bubble Dynamics,O53
  13. The Interaction Study of Laser-Induced Plasma Shock Wave and Adhered Particles on Surface,O539
  14. Particle Simulation Research on the Interaction of Ultra-short Ultra-intense Laser Pulses and Overdense Plasmas,O532.25

CLC: > Mathematical sciences and chemical > Physics > Plasma physics > Constraints and heating > Heating > Laser heating
© 2012 www.DissertationTopic.Net  Mobile