• Title/Summary/Keyword: conductive line

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Conductive Clothing Techniques and Application Status To Live Line Works in T/L (송전선로 활선작업용 도전복 기술 및 적용현황)

  • Lee, H.K.;Han, H.J.;Bang, H.K.
    • Proceedings of the KIEE Conference
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    • 2009.07a
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    • pp.2123_2124
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    • 2009
  • Nowadays live-line work is a general maintenance method in most countries. After 765kV transmission lines constructed, necessity of the live line work is on the rise, due to maintenance problems. During live line working, a line man must wear the conductive clothing for protection from electrical fields and shocks. This paper suggests about design technology and application status of a conductive clothing to live works, before developing the clothing in detail.

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A Study on Properties of Conductive Pattern by the Rheology Characteristics of Ag Pastes for Gravure Printing (그라비어 인쇄용 Ag Paste의 레오로지 특성에 따른 전도성 패턴의 물성 연구)

  • Lee, Dong-Wook;Cho, Mi-Jeong;Lee, Mi-Young;Nam, Su-Yong;Lee, Taik-Min
    • Journal of the Korean Graphic Arts Communication Society
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    • v.26 no.1
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    • pp.39-50
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    • 2008
  • We have manufactured Ag pastes for gravure printing by adding different solvent contents. Then the gravure printability and properties of conductive patterns gravure-printed by the different rheology characteristics of pastes were investigated. The dispersity of pastes was increased and the viscosity and shear rate dependence of viscosity for pastes were decreased by increasing the solvent content. Also storage modulus G', loss modulus G" and angular frequency value when G" starts to be bigger than G' of pastes were increased by decreasing the solvent content. These mean a flow drop of paste. As a result of gravure printing using two plates which have different line counts(175line and 350line), conductive patterns printed using 175line were spreaded more but Ag packing, thickness and conductivity of the conductive patterns were better than those printed using 350line. And the spread values of conductive patterns were increased with solvent contents but the best properties for Ag packing, surface roughness and conductivity of the conductive pattern were obtained by paste (3) which has 550cps of viscosity at $100s^{-1}$ and tan ${\delta}$ > 1 at 10rad/s. As a result of gravure printing using 350 line plate and paste (3), the conductive pattern has $1.2{\mu}m$ of film thickness and $1.9{\times}10^{-5}{\Omega}{\cdot}cm$ of conductivity.

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The Study on an Electric Noise Effect using Physical Scale Modeling (축소모형 실험을 이용한 전기적 잡음에 관한연구)

  • Yun, Jeum-Dong;Song, Young-Su;So, Kyung-Mok
    • 한국지구물리탐사학회:학술대회논문집
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    • 2007.06a
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    • pp.297-302
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    • 2007
  • Recently, electrical resistivity survey is used in the various fields and applied to urban area with many electrical noises. Therefor it's necessary to observe the electrical noise effect of the geological structure. The physical scale modeling was conducted for measuring the electric noise effect of the two geological models at various distances, depths and diameters of the electric noise objects. The results are as following. 1. When conductive noise object was vertical to the strike of geological structure and moved to the strike direction, the effect of conductive noise object at various separated distances to the measurement line was disappeared at a half distance measurement line length regardless of electrode arrays. 2. When conductive noise object was vertical to the strike of geological structure and moved to the strike direction, the effect of conductive noise object at various depths was disappeared at 4unit apart from the measurement line regardless of electrode arrays. 3. When conductive noise object was vertical to the strike of geological structure and moved to the strike direction, the effect of conductive noise object at various diameters was disappeared at 4unit apart from the measurement line regardless of electrode arrays.

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Fabrication of Conductive Patterns by Ink-Jet Prining of Copper Ink

  • Park, Bong-Kyun;Kim, Don-Jo;Jeong, Sun-Ho;Lee, Seul;Moon, Joo-Ho
    • 한국정보디스플레이학회:학술대회논문집
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    • 2006.08a
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    • pp.1382-1385
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    • 2006
  • We have studied ink-jet printing method for patterning of conductive line on flexible plastic substrates. Synthesized copper nano-particles of ${\sim}40\;nm$ were used for the conductive ink and the printed patterns exhibit a smooth line whose line width is about $100\;{\mu}m$.

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Micro Patterning of Nano Metal Ink for Printed Circuit Board Using Inkjet Printing Technology (잉크젯 프린팅 기술을 이용한 나노 금속잉크의 인쇄회로기판용 미세배선 형성)

  • Park, Sung-Jun;Seo, Shang-Hoon;Joung, Jae-Woo
    • Journal of the Korean Society for Precision Engineering
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    • v.24 no.5
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    • pp.89-96
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    • 2007
  • Inkjet printing has become one of the most attractive manufacturing techniques in industry. Especially inkjet printing technology will soon be part of the PCB (Printed Circuit Board) fabrication processes. Traditional printing on PCB includes screen printing and photolithography. These technologies involve high costs, time-consuming procedures and several process steps. However, by inkjet technology manufacturing time and production costs can be reduced, and procedures can be more efficient. PCB manufacturers therefore willingly accept this inkjet technology to the PCB industry, and are quickly shifting from conventional to inkjet printing. To produce the printed circuit board by the inkjet technology, it must be harmonized with conductive nano ink, printing process, system, and inkjet printhead. In this study, micro patterning of conductive line has been investigated using the piezoelectric printhead driven by a bipolar voltage signal is used to dispense 20-40 ${\mu}m$ diameter droplets and silver nano ink which consists of 1 to 50 nm silver particles that are homogeneously suspended in an organic carrier. To fabricate a conductive line used in PCB with high precision, a printed line width was calculated and compared with printing results.

Design and Fabrication of Signal and Power Transmission Textile Cable for Smart Wearables (스마트 웨어러블의 신호와 전력 전송용 섬유형 케이블 개발)

  • Lee, Hyewon;Im, Hyo bin;Roh, Jung-Sim
    • Fashion & Textile Research Journal
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    • v.20 no.5
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    • pp.616-620
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    • 2018
  • Recently, many researches have been conducted to improve the performance and wearability of smart wearables. In this study, we designed and fabricated the signal and power transmission textile cables for smart wearables which have excellent wearability, durability and reliability. For the signal transmission textile cables, conductive yarns for the signal line and the ground line were developed. Three types of signal transmission textile cables have been developed using the conductive yarns. Linear density, tensile properties, electrical resistance and RF characteristics were tested to characterize the physical and electrical properties of three signal transmission textile cables. The conductive yarns have the very low resistance of $0.05{\Omega}/cm$ and showed excellent uniformity of electric resistance. Therefore, the electrical resistance of the signal transmission fiber cable can be reduced by increasing the number of conductive yarns used in signal and ground lines. However, the radio frequency (RF) characteristics of the signal transmission textile cables were better as the number of strands of the conductive yarns used was smaller. This is because the smaller the number of strands of conductive yarn used in signal transmission textile cables, the narrower and more parallel the distance between the signal line and the ground line. It is expected that the signal and power transmission textile cable for signal and power transmission will be utilized in smart wearable products.

Ink-Jet Printing of Conductive Silver Inks for Flexible Display Devices

  • Kim, Dong-Jo;Park, Jung-Ho;Jeong, Sun-Ho;Moon, Joo-Ho
    • 한국정보디스플레이학회:학술대회논문집
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    • 2005.07b
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    • pp.1491-1494
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    • 2005
  • We have studied ink-jet printing method for patterning conductive line on flexible plastic substrates. Synthesized silver nano-particles of ${\sim}$20nm were used for the conductive ink and the printed patterns exhibit a smooth line whose linewidth is below 100 ${\mu}m$. This ink-jet printing technique can be applied to flexible displays and electronics.

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Electric Circuit Fabrication Technology using Conductive Ink and Direct Printing

  • Jeong, Jae-U;Kim, Yong-Sik;Yun, Gwan-Su
    • Proceedings of the Materials Research Society of Korea Conference
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    • 2009.05a
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    • pp.12.1-12.1
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    • 2009
  • For the micro conductive line, memory device fabrication process use many expensive processes such as manufactur-ing of photo mask, coating of photo resist, exposure, development, and etching. However, direct printing technology has the merits about simple and cost effective processes because nano-metal particles contained inks are directly injective without mask. And also, this technology has the advantage about fabrication of fine pattern line on various substrates such as FPCB, PCB, glass, polymer and so on. In this work, we have fabricated the fine and thick metal pattern line on flexible PCB substrate for the next generation electronic circuit using Ag nano-particles contained ink. To improve the line tolerance on flexible PCB, metal lines are fabricated by sequential prinitng method. Sequential printing method has vari-ous merits about fine, thick and high resolution pattern lines without bulge.

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A SHIELDING EFFECTIVENESS of COATED CONDUCTIVE POLYMER for ELECTROMAGNETIC SHIELDING (전자파 차폐용 전도성 고분자 코팅재료의 차폐효율)

  • 최재옥;임윤석;장용무;서광석;구자윤
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2000.07a
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    • pp.624-627
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    • 2000
  • The shielding effectiveness of materials is determined by measuring the ratio of the incident electromagnetic power which passes through the material under test. To measure the shielding effectiveness materials made by conductive polymer, the flanged coaxial transmission-line holder based in ASTM D4935-89, was fabricated. This apparatus has dynamic range between 95dB and 120dB in frequency range of 50Mhz-2Ghz. Furthermore, this system can be utilized to measure the shielding effectiveness of materials produced by conductive polymer and can be adapted for shielding materials design.

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