• Title/Summary/Keyword: Electrode fabrication

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Experimental study on the surface integrity of electrode for WEDG process (WEDG 전극가공에서의 전극표면형상의 실험적 고찰)

  • 안현민;김영태;박성준;이송규;이상조
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2002.10a
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    • pp.218-222
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    • 2002
  • Micro-EDM is generally used far machining micro holes, pockets, and 3-D structures. For micro-EDM, first of all, micro-electrode fabrication is needed and WEDC system is proposed for tool electrode fabrication method. When tool electrode is fabricated using WEDG system, its characteristics are under the control of many EDM parameters. Also relations between the parameters affect electrode fabrication. In this study, experiments are carried out to analyze effects of EDM parameters about electrode surface integrity on micro-electrode fabrication. Experimental method and analysis are used to experimental design method. Factors used in experiments are composed of capacitance, resistance, pause time, wire feed rate, spindle rotating speed. As a result of experiments, capacitance and resistance affect electrode surface.

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Fabrication and feasibility estimation of Micro Engine Component (미세 엔진 운용성 검증 및 요소 기술 개발)

  • Lee, Dae-Hoon;Park, Dae-Eun;Choi, Kwon-Hyoung;Yoon, Joon-Bo;Kwon, Se-Jin;Yoon, Eui-Sik
    • Proceedings of the KSME Conference
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    • 2001.06d
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    • pp.31-36
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    • 2001
  • As a part of micro engine development feasibility estimation was done through fabrication and test of down scaled combustor and MEMS fabricated spark electrode. In an experimental observation of the down scaled combustion phenomena where flame propagation was observed by optical method and pressure change in combustor which gives the information about the reaction generated thermal energy was recorded and analyzed. Optimal combustor scale was derived to be about 2mm considering increased heat loss effect and thermal energy generation capability. Through the fabrication and discharge test of MEMS electrode effects of electrode width and gap was investigated. Electrode was fabricated by thick PR mold and electroplating. From the result discharge voltage characteristic in sub millimeter scale electrode having thickness of $40{\mu}m$ was obtained. From the result base technology for design and fabrication of micro engine was obtained.

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Micro-electrode machining characteristics using the Micro-EDM (마이크로 방전가공기를 이용한 미세전극 가공특성)

  • 안현민;김영태;박성준;이상조
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2002.05a
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    • pp.1003-1007
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    • 2002
  • Micro-EDM is generally used far machining micro 3-D structure. For micro-EDM, first of all, micro-electrode fabrication is needed and WEDG system is proposed for tool electrode fabrication method. When tool electrode is fabricated using WEDG system, its characteristics are under the control of many EDM parameters. Also relations between the parameters affect electrode fabrication. In this study, experiments are carried out to analyze effects of EDM parameters on micro-electrode fabrication. Experimental method and analysis are used to experimental design method. Factors used in experiments are composed of applied voltage, capacitance, wire feed rate, spindle rotating speed, machining time. As a result of experiments, wire feed rate, machining time and capacitance is proportional to gap distance(material removal), the other parameters(applied voltage, spindle rotating speed) and relations between the parameters have little influence on machining.

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Effects of electrode fabrication conditions on performance characteristics of phosphoric acid fuel cell (인산형 연료전지 성능 특성에 미치는 전극 제조 조건의 영향)

  • 송락현;김창수;신동렬
    • The Transactions of the Korean Institute of Electrical Engineers
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    • v.45 no.2
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    • pp.224-229
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    • 1996
  • Performance characteristics of single cell in phosphoric acid fuel cell were studied for various electrode fabrication parameters such as teflon content, electrode structure, thickness of electrocatalyst layer, platinum content and electrode area. The performance of single cell was decided from the measured voltage-current through a load change. The electrode of 40wt.% teflon exhibited high initial performance of single cell, but in the long term operation, the cell performance of 45 wt.% teflon was better. Also the single cell appeared good performance in case of electrodes with duplicate structure, thin electrocatalyst in thickness, more platinum content, and small area. These results of cell performance were discussed as related to the electrolyte flooding, formation of 3 phase boundary area, internal resistance of electrode, and microstructure of electrode.

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Fabrication and Realization of Three-Electrode Type Color Reflective Display (3전극형 반사형 컬러 디스플레이의 제작 및 구현)

  • Shin, Yong-Kwan;Kim, Young-Cho
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.28 no.1
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    • pp.21-27
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    • 2015
  • We propose a fabrication process of a 3-electrode type reflective display and ascertain the realized color panel. The first design is proceeded with basis on Ti electrode for fast panel fabrication, easy align process, and high reflection of a white image. To observe the particle movement at the lower electrodes and optimize the space between electrodes, we design the second patterns, from which we establish a fabrication process with the mixing of electronic ink, loading of this ink, electronic ink assembly, driving, and packaging. After aging process, we ascertain a normally driving panel with black, white, and blue color.

Wire-tension Control System using Photo-interrupter Sensor and Micro-electrode Fabrication (광단속센서를 이용한 와이어장력 제어장치 및 마이크로전극 제조)

  • Kang, Myung Chang;Lee, Chang Hoon;Kim, Nam-Kyung
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.12 no.3
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    • pp.28-35
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    • 2013
  • Micro electrical discharge machining (EDM) as a non-contact machining process is very effective for micromachining with a thin electrode because of its low machining reaction force. The micro-electrode machining device has the advantage of maintaining high precision through the whole processes and uses a feeding wire in the thin electrode tool manufacturing process. This study describes the design and evaluation of a micro-electrode machining device using optical photo-interrupter. The electrode was fabricated by reverse electrical discharge machining. The performance of designed system was evaluated to measure tension force according to feed speed of wire. This system for micro electrode fabrication proves the feasibility in the micro-EDM process of the micro holes and parts for industrial applications.

Fabrication of Copper Electrode Array and Test of Electrochemical Discharge Machining for Glass Drilling (유리의 미세 구멍 가공을 위한 구리 전극군 제작 및 전기 화학 방전 가공 시험)

  • Jung, Ju-Myoung;Sim, Woo-Young;Jeong, Ok-Chan;Yang, Sang-Sik
    • Proceedings of the KIEE Conference
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    • 2003.10a
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    • pp.297-299
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    • 2003
  • In this paper, we present the fabrication of copper electrode array and test of electrochemical discharge machining for the fabrication of microholes on Borofloat33 glass. Copper electrode array is fabricated by the bonding of silicon upper substrate and lower substrate and copper electroplate. The silicon upper electrode having microholes fabricated by ICP-RIE is the mold of copper electroplate. The lower substrate is used as the seed layer for copper electroplate after Au - Au thermocompression bonding with the upper substrate.

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A Study on the micro-electrochemical phenomenon using point electrode method (점 전극을 이용한 마이크로 전해현상의 고찰)

  • 김봉규;박규열
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2001.04a
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    • pp.1093-1096
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    • 2001
  • Eletrochemical phenomenon are employed in the manufacturing of micro-electrochemical machining(micro-ECM). The application of controlled electrochemical metal removal in the fabrication of microstructures and microcomponents is refer to as micro-electrochemical machining. In this paper, we introduce a new method named $\ulcorner$point-electrode electro chemical machining method$\lrcorner$ was proposed to establish micro fabrication technology by use of electrochemical machining. And we find effect of the electrochemical phenomenon in several conditions.

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Fabrication of High-performance Carbon Counter Electrode for Dye-sensitized Solar Cells (염료감응 태양전지용 고성능 탄소 상대전극 제작)

  • Jang, Yeon-Ik;Lee, Seung-Yong;Kim, Dong-Hwan;Park, Jong-Ku
    • Journal of Powder Materials
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    • v.14 no.1 s.60
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    • pp.44-49
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    • 2007
  • In the fabrication of dye-sensitized solar cells (DSSCs), carbon counter electrode has been tested for replacing the platinum counter electrode which has two drawbacks: limited surface area and high material cost. Poor mechanical stability of carbon layer due to weak bonding strength to electrically conductive TCO (transparent conducting oxide) glass substrate is a crucial barrier for practical application of carbon counter electrode. In the present study a carbon counter electrode with high conversion efficiency, comparable to Pt counter electrode, could be fabricated by adaption of a bonding layer between particulate carbon material and TCO substrate.

A Study on the Fabrication of Periodic Holes on Metal Electrode for Electrodeionization System Application (전기탈이온시스템 응용을 위한 주기적 홀을 갖는 금속 전극 제작에 관한 연구)

  • Yeo, Jong-Bin;Sun, Sang-Wook;Lee, Hyun-Yong
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.26 no.3
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    • pp.227-231
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    • 2013
  • Electrodeionization is a hybrid separation process of electrodialysis and ion exchange to produce high purity water under electric field. This article provides a fabrication result of hole patterned metal electrode for elecrodeionization system. The hole patterns have been fabricated by nanosphere lithography (NSL). The technique utilizes the self-assembled nanospheres as lens-mask patterns and collimated laser beam source. The hole patterns have a periodic array structure. The images of hole pattern on metal electrode prepared were observed by SEM. We believe that the periodic hole patterned metal electrode structure is a useful device applicable for metal mat electrode in electrodeionization system.