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최병오(B.O.Choi),김동수(D.S.Kim),이택민(T.M.Lee),김충환(C.H.Kim),이명훈(M.H.Lee),임규진(K.J.Lim) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
Printing technology has begun to get into the spotlight in many ways due to the low cost effectiveness to existent semi-conductor process. It also has very useful application areas, not only paper printing but also patterning for LCD color filter, Photovoltaic patterning, RFID antenna, OLED, and so on. In this study, an apparatus of gravure offset printing was developed for fine line width printing. A flat gravure plate made of brass was engraved as the original pattern. The pattern was composed of 20 ㎛ size of continuous lines of which pitch size was 40 ㎛. An ink was poured and filled into the line holes by doctor blade. It was finally transferred to an aluminium plate via rubber roll. The printed pattern shows that it is possible to make around 20 ㎛ line-width printing pattern and to make conductive lines if an suitable conductive ink is used.
최병오(B.O.Choi),류병순(B.S.Ryu),김충환(C.H.Kim),이택민(T.M.Lee),김동수(D.S.Kim),윤소남(S.N.Youn),이명훈(M.H.Lee),임규진(K.J.Lim) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
Manufacturing of printed electronics using printing technology has begun to get into the hot issue in many ways due to the low cost effectiveness to existing semi-conductor process. This technology, with low cost and high productivity, can make it possible to produce printed electronics(sensors, simple circuit, LCD color filter, Photovoltaic patterning, RFID antenna, OLED, and so on). In this paper, the roll-to-roll printing system under development for printing of printed electronics is presented. The system consists of winder/ rewinder, two printing units, dryer units, guiding unit, vision system, and other auxiliary devices. For testing of multi -layer printing, the system was designed to be capable of printing two different materials from each printing unit using gravure-offset printing method and have a function of alignment of two printed materials.
최병오(B.O. Choi),이기욱(K.W. Lee),박종원(J.W. Park) 유공압건설기계학회 2014 유공압건설기계학회 학술대회논문집 Vol.2014 No.4
The components of vehicles, aircraft, ships, agricultural machinery, transportation machinery, and various mechanical structures are subjected to the number of limitations in the environmental test conditions and test costs for realizing actual field condition. Therefore, hybrid dynamometer test System for reproduction of combined environment, which can provide a test environment such as the actual operating conditions, has an economic advantage and very convenient to design optimization and evaluation for newly developed products. In this study, we studied on designing and realizing the hybrid dynamometer test System for reproduction of combined environment which can simulate the vehicle outside environmental factors such as high temperature, low temperature, humidity, salt, thermal shock, random vibration, mechanical shock and so on. The actual field operating condition can be reproduced by the integrated simultaneous control system for hydraulic actuators, hybrid dynamometer and environmental chamber in the developed testing system. The developed hybrid dynamometer test System for reproduction of combined environment can be used to analyze root cause for field failure mechanism which was hardly found in the existing test system. We also expect that the developed testing system is able to contribute for improving the reliability growth of the power train component in transportation system.