Atmospheric Pressure DC Plasma Microdischarges: A Characterization Study

2003 ◽  
Author(s):  
Jeong W. Yi ◽  
Fang Yan ◽  
Bakhtier Farouk
Keyword(s):  
Atmospheric Pressure ◽  
Electrode Materials ◽  
Flat Surface ◽  
Atmospheric Pressure Plasma ◽  
Plasma Potential ◽  
Dc Plasma ◽  
Glow Discharges ◽  
Characterization Study ◽  
Current Voltage ◽  
Current Voltage Characteristics

Atmospheric pressure dc plasma microdischarges were generated between a thin cylindrical electrode and a flat surface. The glow discharges were characterized both experimentally and numerically. As the applied voltage is increased, the plasma potential in the plasma microdischarge remains constant while the plasma current increases proportionally. For the types of electrode materials and the range of the electrode diameters considered, the current-voltage characteristics of the plasma microdischarge are almost independent of the electrode material and the diameter of the electrodes. Predictions from a numerical model of the argon microdischarge compare favorably with the experimental measurements and the visualization studies. The atmospheric pressure plasma microdischarge can be used for deposition of thin films and for microfabrication.

First-Principles Modeling for Current-Voltage Characteristics of Resistive Random Access Memories

2013 ◽  
Vol 1562 ◽  
Author(s):  
Takehide Miyazaki ◽  
Hisao Nakamura ◽  
Kengo Nishio ◽  
Hisashi Shima ◽  
Hiroyuki Akinaga ◽  
...  
Keyword(s):  
First Principles ◽  
Oxygen Vacancies ◽  
Electrode Materials ◽  
Random Access ◽  
Model Systems ◽  
Electronic Coupling ◽  
Current Ratio ◽  
Current Voltage ◽  
Current Voltage Characteristics ◽  
Non Equilibrium Green’S Function

ABSTRACTWe present results of first-principles non-equilibrium Green’s function calculations for current-voltage (IV) characteristics of the electrode/HfO2/electrode model systems. In order to investigate the effect of the electrode materials on the IV characteristics, we considered two transition metals for electrode, Ta and W, which are both body-centered-cubic elemental metals but have different valence numbers. We simulated the ON state by placing oxygen vacancies in the HfO2 layer while the OFF state was modeled with HfO2 without oxygen vacancies. At the OFF state, no electric current flowed for -1 V up to +1 V, as expected. At the ON state, however, we found that the absolute current for the Ta electrode was twice as large as that for the W electrode. The analysis of the IV characteristics shows that the electronic coupling between Ta and HfO2 is substantially stronger than that between W and HfO2. Our study demonstrates the importance of the matching between electrode and insulator materials to achieve a high ON- to OFF-current ratio in ReRAMs at a low bias.

scholarly journals Electrical glow discharges and plasma parameter of planar sputtering system for silver target

2018 ◽  
Vol 16 (37) ◽  
pp. 65-72
Author(s):  
Mazin H. Hasan
Keyword(s):  
Breakdown Voltage ◽  
Uniform Electric Field ◽  
Plasma Parameters ◽  
Argon Gas ◽  
Glow Discharges ◽  
Current Voltage ◽  
Paschen Curve ◽  
Silver Target ◽  
Current Voltage Characteristics ◽  
Sputtering System

DC planar sputtering system is characterized by varying discharge potential of (250-2000 volt) and Argon gas pressures of (3.5×10-2 – 1.5) mbar. The breakdown voltage for silver electrode was studied with a uniform electric field at different discharge distances, as well as plasma parameters. The breakdown voltage is a product of the Argon gas pressure inside the chamber and gab distance between the electrodes, represent as Paschen curve. The Current-voltage characteristics curves indicate that the electrical discharge plasma is working in the abnormal glow region. Plasma parameters were found from the current-voltage characteristics of a single probe positioned at the inter-cathode space. Typical values of the electron temperature and the electron density are in the range of (2.93 –5.3) eV and (10-16 -10-17) m-3 respectively.

Specific features of the current-voltage characteristics of diffuse glow discharges in Ar:N2 mixtures

2010 ◽  
Vol 36 (12) ◽  
pp. 1040-1064 ◽  
Author(s):  
N. A. Dyatko ◽  
Yu. Z. Ionikh ◽  
A. V. Meshchanov ◽  
A. P. Napartovich ◽  
K. A. Barzilovich
Keyword(s):  
Glow Discharges ◽  
Current Voltage ◽  
Current Voltage Characteristics ◽  
Diffuse Glow

scholarly journals Physical features of atmospheric pressure microdischarge system with vortex gas flows

2014 ◽  
Vol 13 (1) ◽  
Author(s):  
Iryna Prysiazhnevych ◽  
Vasyl Lendel ◽  
Valeriy Chernyak ◽  
Oksana Solomenko ◽  
Eugene Martysh ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Optical Emission ◽  
Video Camera ◽  
Plasma Jets ◽  
Gas Flows ◽  
Current Voltage ◽  
Ratio Set ◽  
Different Shapes ◽  
Current Voltage Characteristics ◽  
Physical Features

AbstractThe parameters for microdischarges of plasma medicine in air and argon vortex flows at atmospheric pressure for different shapes of electrodes (outlet nozzle and axis electrode diameters ratio set) have been investigated. The current-voltage characteristics of the designed systems have been analyzed, the parameters of the generated jets plasma have been investigated by means of the optical emission spectroscopy, and the form of plasma jets has been studied by using video camera.

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