• Title, Summary, Keyword: ink-jet printing

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Investigation of charge injection in organic thin film transistor using ink-jet printed silver electrodes

  • Kim, Dong-Jo;Jeong, Sun-Ho;Lee, Sul;Jang, Dae-Hwan;Moon, Joo-Ho
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.730-732
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    • 2007
  • We fabricated a coplanar type organic thin-film transistors using ink-jet printed silver source/drain electrodes and ${\alpha},{\omega}-dihexylquaterthiophene$ (DH4T) which is an active layer. Use of ink-jet printed silver nanoparticle-based metal electrode assists the energetic mismatch with p-type organic semiconductor via modification of their interfacial properties to enable ohmic contact formation.

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Self-Alignment Ink-Jet Printed Light Emitting Devices and Light Emitting Seals

  • Okada, Hiroyuki;Matsui, Kenta;Naka, Shigeki;Shibata, Miki;Ohmori, Masahiko;Kurachi, Naomi;Sawamura, Momoe;Suzuki, Shin-Ichi;Inoue, Toyokazu;Miyabayashi, Takeshi;Murase, Makoto;Takao, Yuuzou;Hibino, Shingo;Bessho, Hisami
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.449-452
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    • 2009
  • Ink-jet printed (IJP) self-aligned (SA) organic light emitting diodes (OLEDs) and its application to light emitting seal have investigated. Ink-jet printing of light emitting material is carried out onto transparent anode covered with insulating material. Laminated light emitting seal with SA IJP OLED without photo - lithographic process and any vacuum process, noncontact type electromagnetic power supply without electric power supply line, and light emitting tag with network type RF communication terminal by controlling display information were demonstrated.

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A Study for Micro-patterning using an Electrostatic Inkjet (정전기력 잉크젯 프린팅을 이용한 마이크로 패터닝에 관한 연구)

  • Kim, Jun-Woo;Choi, Kyoung-Hyun;Kim, Dong-Soo
    • Proceedings of the KSME Conference
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    • pp.1103-1106
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    • 2008
  • For the current display process, the innovative micro pattern fabrication process using semiconductor process should be developed, which requires the expensive equipment, the limited process environment and the expensive optic-sensitive material. The effort of process innovation during past several years ends up the limit of cost reduction. The existing ink jet technologies such as a thermal bubble ink jet printing and a piezo ink jet printing are required to shorten the nozzle diameter in order to apply to the micro pattern fabrication. In this paper, as one way to cope these problems the micro pattern equipment based on the electrostatic ink jet has been developed and carried out some experiments.

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Contact resistance extraction between Ink-jet printed PEDOT-PSS and Pentacene in OTFTs

  • Kim, Myung-Kyu;Kang, Rae-Wook;Song, Chung-Kun
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.654-656
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    • 2008
  • We enhanced the conductivity of PEDOT-PSS by mixing with glycerol and fabricated the low contact resistance of source and drain[S/D] electrodes of OTFT with PEDOT-PSS by ink-jetting printing. The contact resistance was much smaller by seven times than Au with $200k{\Omega}$ at $V_G=-5V$. For the bottom contacted OTFTs, the performance was comparable to OTFTs with Au electrodes with the field effect mobility of $0.2\;cm^2/V s$.

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Influence an Oxide Layer Thickness on Resistivity of Cu Conductive Film and Ink-jet Printing of Cu Nanoparticle Ink

  • Jeong, Sun-Ho;Woo, Kyoo-Hee;Kim, Dong-Jo;Lim, Soon-Kwon;Kim, Jang-Sub;Moon, Joo-Ho
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.724-726
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    • 2007
  • We have developed the synthesis method to reduce the surface oxide layer in Cu nanoparticle, which is based on controlling the molecular weight of capping polymer. In addition, we demonstrated how the variation of oxide layer thickness influences the resistivity of conductive Cu film.

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A Study on the Media Treatment Technology of the High-Coloured Digital Textile Printing (고발색 디지털 프린팅을 위한 미디어 전처리 기술)

  • Hong, Min-Gi;Lee, Ha-Na;Kim, Ji-Young;Zhang, Lian-Ping;Yoon, Seok-Han;Kim, Mi-Kyung;Kim, Sam-Soo
    • Textile Coloration and Finishing
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    • v.19 no.4
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    • pp.1-9
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    • 2007
  • In recent years, the application of digital textile printing has increased. The benefits of using this method include the ease of sampling and the production of printed textiles. However, the production process of digital textile printing differs from that of conventional printing. For successful digital textile printing by ink-jet technology, the pretreatment of fabrics is very important in order to overcome the following problems. Low viscosity ink can spread easily on the textile surface leading to poor resolution. As a result, the combination of ink and pretreatment chemicals is still impractical and consequently most fabrics used in digital textile printing will require a pre treated coating in order to prevent the ink colours from bleeding on the fabric. Research presented in this paper shows some preliminary attempts to establish the relationship between the pre treatment and the digital textile printing quality. Various cotton fabrics were treated with pre treatment agents including ingredients like thickener, alkali and humectant, and then ink spread effect and colour yield of printed fabrics by reactive ink were analysed by using an optical microscope and K/S value. The results show that digital textile printing quality on cotton fabrics can be optimized with appropriate pre treatments.

High performance OTFT using PEDOT:PSS on plastic substrate by inkjet printing

  • Lee, Myung-Won;Choi, Jae-Chul;Park, Jong-Seung;Song, Chung-Kun
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.874-876
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    • 2009
  • This is a report on fabrication and electrical characteristics of pentacene OTFT that uses conducting PEDOT/PSS as source drain electrodes. We demonstrate enhanced conductivity of PEDOT/PSS film with glycerol and optimize properties for ink jet printing. We also present the application of oxygen plasma technique in order to favor selective spreading for subsequent inkjet printing.

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Ink Jet Printing of Functional Materials

  • Canisius, Johannes;Brookes, Paul;Heckmeier, Michael;James, Mark;Mueller, David;Patterson, Katie
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.1121-1124
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    • 2007
  • Ink jet printing has been targeted as a key technology for OLED, TFT backplane and other organic semiconductor device fabrication. This presentation will concentrate on aspects of the IJ process, formulation design, jetting performance, interaction with the substrate and resultant printed device performance.

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Innovations in Materials Deposition for Plastic Electronics

  • Creagh, Linda T.
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.673-675
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    • 2005
  • Ink jet printheads are now widely used in manufacturing processes that require precise dispensing of materials. Today, Dimatix manufactures a variety of drop-on-demand ink jet printheads for the industrial printing market, but emerging opportunities present fresh challenges to our technology. In response to requirements for digitally printing on flexible substrates and dispensing novel electronic fluids, we are developing next generation jetting technology based on our three-dimensional silicon MEMS technology with a piezo-driven pumping chamber integrated into the chip structure. This presentation will address the functional and physical design features and properties of Dimatix's MEMS process, its characteristics, reliability and usability. Examples of opportunities and applications for digitally printing electronic fluids on flexible substrates with MEMS-based ink jet technology will be presented.

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Fabrication of TFTs by using Ink-Jet Printing Process with Poly(4-vinylphenol) Bank layer and TIPS-Pentacene Semiconductor

  • Kim, Se-Min;Kim, Min-Jung;Park, Jong-S.;Song, Chung-Kun
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.937-939
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    • 2009
  • In this paper, we report electrical properties of OTFTs made by ink-jet printing with polyvinylphenol (PVP) for bank layer and bis(triisopropylsilylenthynyl) pentacene (TIPS-pentacene) for semiconductor. We could achieve better crystallization and surface uniformity of TIPS pentacene by employing PVP bank layer. The OTFT with PVP bank layer exhibited an field-effect mobility of 0.18 $cm^2$/Vs, current on/off ratio of $2.09{\times}10^5$, and subthreshold slope of 0.42 V/decane.

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