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A study on development of continuity process system for thin film solar cell
배성우(Bae, Sung-Woo),조정대(Jo, Jeong-Dai),김동수(Kim, Dong-Soo),유성연(Yoo, Seong-Yeon) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.11
Currently, new and renewable energy come into the spotlight, such as solar energy, wind power, fuel cell, hybrid car etc., due to the energy resources is being depleted. In order to solve like this problem, we addressed the roll to roll printing machine for the thin film solar cell by using printing technology. For the this research, we archived concept design and verified propriety.
이택민(Taik-Min Lee),강태구(Tae Goo Kang),양정순(Jeong-Soon Yang),조정대(Jeong-Dai Jo),최병오(Byung-Oh Choi),김광영(Kwang-Young Kim),김동수(Dong-Soo Kim) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
We present a design, analysis, fabrication and performance test of the novel DoD metal-jet system for application to the high-density and high-temperature-melting materials. The theoretical analysis of the metaljet nozzle system is derived by using electro-mechanical analogy. Based on the theoretical analysis results, we design the metal-jet print head system and fabricate the metal-jet system, which can eject the droplet of leadfree metal solder in high-temperature. In the experimental test, we set up the test apparatus for visualization of the droplet ejection and measure the ejected droplet volume and velocity. As a result, the diameter, volume and the velocity of the ejected droplet are about 65 ㎛ ~ 70 ㎛, 145pl ~ 180 pl and 4m/sec, which shows quite good agreement with the theoretical analysis results of the 75 ㎛-diameter and 220 pl-volume of droplet. In comparison with the experimental result, the errors of diameter and volume are 7% ~ 13% and 18 ~ 34%, respectively.
롤투롤 그라비어 오프셋 중첩인쇄에 의한 EL Lamp 전극인쇄
최병오(Byung-Oh Choi),김동수(Dong-Soo Kim),조정대(Jeong-Dai Jo),임규진(Kyu-Jin Lim),류병순(Byung-Soon Ryu) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
A new gravure-offset printing unit is developed, and utilized to construct a R2R(Roll-to-Roll) gravure-offset press with 3 units in line. The rear electrodes of EL Lamp are printed on 125 ㎛ PET film by using the R2R mutilayer gravure-offset press. Electrode pattern is 600 ㎛ line width, Barrier line 200 ㎛, and the gap is 100 ㎛. One pattern pitch is 1000 ㎛. Printing results show that its registration accuracy is in the range of 10 ㎛, and thickness is around 6 ㎛ of 3-layer printing and 4 ㎛ of 2-layer printing. Using the printed electrodes, test samples of EL Lamp were fabricated and tested. Preliminary lighting tests were successful and satisfactory.
이택민(Taik-Min Lee),강태구(Tae Goo Kang),양정순(Jeong-Soon Yang),조정대(Jeong-Dai Jo),김광영(Kwang-Young Kim),김동수(Dong-Soo Kim) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월
In this paper, we present a design, analysis, fabrication and performance test of the novel DoD metal-jet system for application to the high-density and high-temperature-melting materials. Based on the theoretical analysis, we design the metal-jet print head system and fabricate the metal-jet system, which can eject the droplet of lead-free metal solder in the high-temperature. In the experimental test, we set up the test apparatus for visualization of the droplet ejection and measure the ejected droplet volume and velocity. As a result, the diameter, volume and the velocity of the ejected droplet are about 65-70㎛, 145-180 pl and 4m/sec. We also fabricate vertical and inclined 3D micro column structures using the present molten metal inkjet system. The measured geometries of the micro column structures are about height of 2,100㎛, diameter of 200㎛ and aspect ratio of 10.5 for vertical micro column and 1,400㎛ of height and 150㎛ of diameter for 65°- inclined micro column, respectively.
가변 피스톤 펌프 사판각 제어용 서보 레귤레이터 성능평가
박경민(Kyung-Min Park),함영복(Young-Bog Ham),조정대(Jeong-Dai Jo),김광영(Kwang-Young Kim) 한국자동차공학회 2002 한국자동차공학회 Symposium Vol.2002 No.11
Generally, a variable displacement type hydraulic piston pump is varied the swash plate tilting angle by changing<br/> servo piston stroke of the regulator. To control swash plate tilting angle, we have designed and manufactured a servo<br/> regulator with a feedback mechanism as well as the test equipment to measure the response characteristics of this<br/> new regulator. Also, we have performed the simulation for the dynamic response of the regulator using an AMESim<br/> software.<br/> In this paper, we have compared and analyzed with actual experiment results and simulation ones to verify the<br/> performance of the regulator such as the characteristics between the pilot pressure variation and the servo piston<br/> displacement, etc.
윤성식(Seong Shik Yoon),강은구(Eun Gu Kang),유세민(Se Min Yu),허성준(Seong Joon Heo),조정대(Jeong Dai Jo) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Recently, printed electronics have been actively research for apply to electronic device manufacturing process to replace traditional manufacturing process. Roll to Roll printing technology can make it possible to produce electronic device such as display, RFID, solar cell, e-paper, etc. Gravure offset printing is typical method for Roll to Roll printing. In this study, Gravure offset printing is applied to the vertical structure of the printing module equipped with printing system, we found that ink and blanket, film's characteristics are very important element by printing test of the 20㎛, 30㎛, 40㎛, 50㎛ horizontal, vertical, bending, radial fine pattern.
박중호(Jung-Ho Park),윤동원(Dong-Won Youn),이동원(Dong-Weon Lee),함상용(Sang-Yong Ham),조정대(Jeong-Dai Jo) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
A novel MEMS pressure sensor using resistance change of pressure switch array is proposed and developed. It consists of a silicon substrate that has a thin metal-deposited diaphragm and a pressure switch array patterned on Pyrex glass. Pressure switch array is formed by connecting serially a few of electrodes and resistances. When the pressure is applied, the change of the contact area due to the diaphragm deformation is converted to sensor output through an electric signal circuit. To form the metal-deposited diaphragm and the pressure switch array, fabrication process using micromachining technologies is presented. Then, simulation results such as a stress analysis of the diaphragm and contact area characteristics with an applied pressure are presented and several methods for linearity compensation are discussed. Furthermore, basic characteristics of the fabricated prototype are experimentally investigated and the validity of the proposed pressure sensor is verified.