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Fabrication of Transparent Conducting Electrode Pattern by Metal Mesh Method on Stretchable Film Substrate

Materials Sciences and Applications 2019年第5期10卷 393-405页

作者： Gun-Woo lee dock young lee Byung Chan lee Kyungha Baek Genggongwo Shi Jeseob Kim lee Soon Park Su Yong Nam Green Ind. Co. Ltd. Changwon South Korea ELK Corporation Daejeon South Korea Daegu Technopark Daegu South Korea School of Materials Science and Engineering Ulsan National Institute of Science and Technology (UNIST) Ulsan South Korea CCTech Inc. Hwaseong South Korea Department of Graphic Arts Information Engineering Pukyong National University Busan South Korea

Smart phones have become one of major electronic devices for human being. The easy and rapid exchange of information between man and machine is carried out by the touch screen panel (TSP) installed in the smart phones. Currently the smart phones are widely spread out while displays for automobiles are in the initial stage of developments. Since the automobile displays should fit the curved area of indoor space of the vehicle, the TSPs for automobiles need to be fabricated on the flexible and stretchable substrate film. In this study, we selected the thermo-plastic polyurethane film as the substrate film and examined the materials and process for fabrication of metal mesh type transparent conducting electrode films suitable for TSPs of automobile displays. The optimum UV resin system was established by the evaluation of various UV resin formulations in the UV imprinting process to make 3 × 3.5 μm trench patterns on the metal mesh type electrode film utilizing the embossed metal mask plate. The Ag paste has also been prepared by synthesis of Ag nanoparticles and formulation with the binder polymers. The inlay (filling) of Ag paste in the trench layer of transparent electrode film showed that the variation of electrical resistance was within 10% upon bending up to 100,000 times to radius of 3 mm.

关键词： Touch Screen Panel Silver Paste Stretchable Substrate Film UV Imprinting UV Resin Formulation

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Effects of casting speed on microstructure and segregation of electromagnetically stirred Aluminum alloy in continuous casting process

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Rare Metals 2006年第z2期25卷 118-123页

作者： lee dock-young KANG Suk-Won CHO Duck-Ho KIM Ki-Bae Division of Materials Korea Institute of Science and Technology P.O. Box 131 Cheongryang Seoul 130-650 Korea Department of Applied Materials Engineering Hanbat National University Daejeon 305-719 Korea

Recently, a semi-solid metal processing has been acknowledged as a cost-effective technique to be able to manufacture high quality product for the transportation industry. In this study a hypo-eutectic Al alloy was fabricated by means of an electromagnetic stirrer in continuous casting process and the microstructural change during solidification due to a fluid flow by electromagnetic stirring was examined. Due to the forced fluid flow during solidification a dendritic phase of primary α phase of Al alloy was turned into a globular phase, which can make the Al alloy get a thixotropic behavior in the semi-solid region. In order to establish the quantitative relationship between microstructure and the process parameters, the morphology shape, a silicon distribution and a size of primary α phase were observed according to casting speed in continuous casting machine. The primary α phase was turned into the degenerate dendrites approaching a spherical configuration with increasing casting speed. The fine-grained and equiaxed microstructure appeared at higher casting speed. A segregation behavior of Si element was declined with increasing casting speed and a very uniform distribution of Si element was observed on the billet at a casting speed of 600 mm·min-1. A thickness of the solidifying shell of the billet was shortened with increasing the casting speed.

关键词： semi-solid slurry electromagnetic stirring casting speed segregation Al alloy

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Influence of tool plunge depth and welding distance on friction stir lap welding of AA5454-O aluminum alloy plates with different thicknesses

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中国有色金属学会会刊：英文版 2012年第S3期22卷 624-628页

作者： Jun-Won KWON Myoung-Soo KANG Sung-Ook YOON Yong-Jai KWON Sung-Tae HONG Dae-Il KIM Kwang-Hak lee Jong-dock SEO Jin-Soo MOON Kyung-Sik HAN School of Materials Science and Engineering University of Ulsan School of Mechanical Engineering University of Ulsan Technical Research Laboratories Shin Young Co.Ltd. Automotive Parts Innovation Center Ulsan Technopark

AA5454-O aluminum alloy plates with thicknesses of 1.4 and 1.0 mm were friction-stir-lap-welded (FSLWed).The influences of the tool plunge depth and welding distance on surface appearance,macrostructure and mechanical properties of the FSLWed plates were experimentally *** tensile shear load of the FSLWed plates was compared with that of the adhesive-bonded ***-free FSLWed zones were successfully obtained in all the tool plunge depths and the welding *** FSLWed zones exhibited the relatively smooth surface *** all the FSLWed conditions,the FSLWed zone exhibited higher average hardness than the base *** addition,the upper plate exhibited a higher average hardness than the lower plate,although there was no special tendency in spite of the change in the tool plunge depth and the welding *** maximum tensile shear load of the FSLWed plates was much higher than that of the adhesive-bonded aluminum alloy ***,under the FSLW condition of the plunge depth of 1.8 mm and the welding distance of 40 mm,the tensile shear load of the FSLWed plate reached a level about 41% greater than that of the adhesive-bonded aluminum alloy *** addition,the maximum tensile shear load of the FSLWed plate was increased with the increase of the welding distance.

关键词： friction stir lap welding AA5450-O aluminum alloy tool plunge depth welding distance mechanical properties

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Influences of tool plunge speed and tool plunge depth on friction spot joining of AA5454-O aluminum alloy plates with different thicknesses

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中国有色金属学会会刊：英文版 2012年第S3期22卷 629-633页

作者： Sung-Ook YOON Myoung-Soo KANG Yong-Jai KWON Sung-Tae HONG Dong-Hwan PARK Kwang-Hak lee Chang-Yong LIM Jong-dock SEO School of Materials Science and Engineering University of Ulsan School of Mechanical Engineering University of Ulsan Institute of E-Vehicle Technology University of Ulsan Technical Research Laboratories Shin Young Co.Ltd.

AA5454-O aluminum alloy plates with the thicknesses of 1.4 and 1.0 mm were friction-spot-joined (FSJed).The plunge speed of the joining tool was changed in a range of 100 500 mm/min under a constant rotation speed of 500 r/*** plunge depth was ranged from 1.6 mm to 2.2 *** tool plunge speed did not make a remarkable effect on the surface appearance and macro-structure of the FSJed *** average hardness of the FSJed zone was greater than or equal to that of the base ***,there was no remarkable tendency in the average hardness change of the FSJed zone in spite of the variation in the tool plunge speed and tool plunge *** increase of the tool plunge depth resulted in the increase of the tensile shear ***,the change of the tool plunge speed did not lead to the remarkable variation in the tensile shear load of the FSJed *** was noteworthy that the FSJed plate exhibited the highest tensile shear load of about 4.0 kN.

关键词： friction spot joining AA5454-O aluminum alloy plunge speed plunge depth mechanical property

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Friction stir butt welding of A5052-O aluminum alloy plates

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中国有色金属学会会刊：英文版 2012年第S3期22卷 619-623页

作者： Sung-Ook YOON Myoung-Soo KANG Hyun-Bin NAM Yong-Jai KWON Sung-Tae HONG Jin-Chun KIM Kwang-Hak lee Chang-Yong LIM Jong-dock SEO School of Materials Science and Engineering University of Ulsan School of Mechanical Engineering University of Ulsan Technical Research Laboratories Shin Young Co.Ltd.

Friction stir butt welding (FSW) between A5052-O aluminum alloy plates with a thickness of 2 mm was *** rotation speeds of the welding tool were 2000 and 3000 r/min,*** traverse speed was ranged from 100 mm/min to 900 mm/*** defect-free welds with the very smooth surface morphology were successfully obtained,except for at the welding condition of 3000 r/min and 100 mm/*** onion ring structure was observed in the friction-stir-welded zone (SZ) at the condition of 2000 r/min and 100 mm/*** all the welding conditions,the grain size of the SZ was smaller than that of the base metal,and was decreased with the decrease of the tool rotation speed and with the increase of the tool traverse *** stir zone exhibited higher average hardness than the base *** decrease of the tool rotation speed and the increase of the tool traverse speed resulted in the increase in the average hardness of the *** tensile strength of the FSWed plates was similar to that of the base metal,except for at the welding condition of 3000 r/min and 100 mm/*** total elongation of the FSWed plates was lower than that of the base metal.

关键词： friction stir butter welding A5052-O aluminum alloy microstructure mechanical property

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