• Title, Summary, Keyword: Contact Printing

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Application of Screen Printing and Photo Lithography Multi-layer Metal Contact for Single Crystalline Silicon Solar Cells (단결정 실리콘 태양전지를 위한 screen printing 전극과 photo lithography 다층전극의 적용에 대한 연구)

  • Kim, Do-Wan;Choi, Jun-Young;Lee, Eun-Joo;Lee, Soo-Hong
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.109-109
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    • 2006
  • Screen printing (SP) metal contact is typically applied to the solar cells for mass production. However, SP metal contact has low aspect ratio, low accuracy, hard control of the substrate penetration and unclean process. On the other hand, photo lithograpy (PL) metal contact can reduce defects by metal contact. In this investigation, PL metal contact was obtained the multi-layer structure of Ti/Pd/Ag by e-beam process. We applied SP metal contact and PL metal contact to single crystalline silicon solar cells, and demonstrated the difference of conversion efficiency. Because PL metal contact silicon solar cell has Jsc (short circuit current density) better than silicon solar cell applied SP metal contact.

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Design and Multi-scale Analysis of Micro Contact Printing (미세접촉인쇄기법의 설계와 다중스케일해석)

  • Kim, Jung-Yup;Kim, Jae-Hyun;Choi, Byung-Ik
    • Proceedings of the KSME Conference
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    • pp.1927-1931
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    • 2003
  • Nanometer-sized structures are being applied to many fields including micro/nano electronics, optoelectronics, quantum computing, biosensors, etc. Micro contact printing is one of the most promising methods for manufacturing the nanometer-sized structures. The crucial element for the micro contact printing is the nano-resolution printing technique using polymeric stamps. In this study, a multi-scale analysis scheme for simulating the micro contact printing process is proposed and some useful analysis results are presented. Using the slip-link model [1], the dependency of viscoelasticity on molecular weight of polymer stamp is predicted. Deformation behaviors of polymeric stamps are analyzed using finite element method based upon the predicted viscoelastic properties.

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Fabrication Method of Metal Grid Mesh Film Using the Gravure Offset Printing (그리비어 옵셋을 이용한 메탈 그리드 메쉬 필름 제작 기법)

  • Kim, Jung Su;Kim, Dong Soo
    • Journal of the Korean Society for Precision Engineering
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    • v.31 no.11
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    • pp.969-974
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    • 2014
  • Previously fabricated electronic devices were used for vacuum manufacturing processes such as conventional semiconductor manufacturing. However, they are difficult to apply to continuous processes such as roll-to-roll printing, which results in very high device manufacturing and processing costs. Therefore, many developers have been interested in applying continuous processes to contact printing or noncontact printing technologies and they proposed various continuous printing techniques instead of conventional batch coating. In this paper, we proposed improved gravure offset printing process as one of the contact printing technique. We used etching pattern geometry with soft core blanket roll for printing of ultra fine line below the 10um.Using this technique we obtained flexible metal grid mesh film as transparent conductive film.

Fabrication of ZnO TFTs by micro-contact printing of silver ink electrodes

  • Shin, Hong-Sik;Yun, Ho-Jin;Nam, Dong-Ho;Choi, Kwang-Il;Baek, Kyu-Ha;Park, Kun-Sik;Do, Lee-Mi;Lee, Hi-Deok;Wang, Jin-Suk;Lee, Ga-Won
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.1600-1603
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    • 2009
  • In this work, we have fabricated inverted staggered ZnO TFTs with 1-${\mu}m$ resolution channel length by micro contact printing (${\mu}$-CP) method. Patterning of micro scale source/drain electrodes without etching is successfully achieved by micro contact printing method by using silver ink and polydimethylsiloxane (PDMS) stamp. And the time dependent characteristics of the sheet resistance show that Ag inklayer could be used as source and drain electrodes for ZnO TFTs.

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Low-Loss Polymeric Waveguides Having Large Cores Fabricated by Hot Embossing and Micro-contact Printing Techniques

  • Yoon, Keun Byoung
    • Macromolecular Research
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    • v.12 no.5
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    • pp.474-477
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    • 2004
  • We present simple, low-cost methods for the fabrication of polymeric waveguides that have large core sizes for use as optical interconnects. We have used both hot embossing and micro-contact printing techniques for the fabrication of multimode waveguides using the same materials. Rectangular and large-core (60${\times}$60 $\mu\textrm{m}$$^2$) channels were readily prepared when using these methods. The dimensions of the embossed and printed channels were the same as those of the pattern on the original master. The polymeric waveguides that we fabricated with large core sizes exhibited a low propagation loss of 0.1 dB/cm at 850 nm, which indicates that hot embossing and micro-contact printing are suitable techniques for the fabrication of optical waveguides having large-core.

Ink-Jet 3D Printability of Ceramic Ink with Contact Angle Control

  • Park, Jae-Hyeon;Lee, Ji-Hyeon;Kim, Deug Joong;Hwang, Kwang-Taek;Kim, Jin-Ho;Han, Kyu-Sung
    • Journal of the Korean Ceramic Society
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    • v.56 no.5
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    • pp.461-467
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    • 2019
  • Ink-jet printing technology, which utilizes a digitalized design to print fine ink directly on a substrate, has been of interest in various industries due to its high efficiency and adaptability to various materials. Recently, active attempts have been made to apply ceramic materials having excellent heat resistance, light resistance, and chemical resistance to the ink-jet printing process. In this study, ceramic ink was synthesized by combining ceramic pigments with UV curable polymer. 3D printability at various contact angles between ceramic ink and substrate was analyzed in detail. Rheological properties of the synthesized ceramic ink were optimized to meet the requirements of the ink-jet printing process, and the contact angle of UV curable ceramic ink was controlled through surface treatment of the substrate. The potential for additive manufacturing of ceramic material using ink-jet printing was investigated by analyzing the effect of contact angle control on ceramic ink droplets and their 3D printability.

스크린 프린팅 태양전지의 후면에 적용되기 위한 Al 특성 분석에 관한 연구

  • Lee, Jae-Du;Kim, Min-Jeong;Lee, Su-Hong
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.272-272
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    • 2009
  • Screen-printing metal contact is typically applied to the solar cells for mass production. And metal paste is used widely for rear contact formation of silicon solar cells. However, Screen-printing solar cell metal paste contact has low aspect ratio, low accuracy, high resistivity, hard control of unclean process. In this paper is to develop resistivity of rear contact for silicon solar cells applications. 4-point prove result, This resistivity of rear contact by Al evaporation was measured about $3.56{\times}10^6{\Omega}{\cdot}cm$ less than screen printed solar cell about $52.6{\times}10^6{\Omega}{\cdot}cm$.

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