• Title, Summary, Keyword: ink-jet printing

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Electrical Properties of OTFTs and Inverters by using Ink-Jet Printing with Polyvinylphenol Insulator and TIPS-Pentacene Semiconductor

  • Kang, Rae-Wook;Xu, Yong-Xian;Song, Chung-Kun
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.651-653
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    • 2008
  • In this paper, we report electrical properties of OTFTs by using ink-jet printing with polyvinylphenol (PVP) for gate insulator and bis(triisopropylsilylenthynyl) pentacene (TIPS pentacene) for semiconductor. OTFTs produced the excellent performance with the mobility of $1.27\;cm^2/V.s$ for top contact structure(TCS) and inverter consisting of two OTFTs exhibited the gain of 6.75.

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Flexible, Transparent Thin-Film Transistors Fabricated by Ink-Jet Printing with Carbon Nanotube-Based Conducting Ink

  • Lee, Yeon-Ju;Lee, Woo-Suk;Jeong, Soo-Kyeong;Choi, Seok-Ju;Kim, Hye-Min;Chun, Jin-Young;Kim, Sung-Ho;Geckeler, Kurt E.
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.920-922
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    • 2009
  • Flexible, transparent thin-film transistor with active layers composed of carbon nanotube-based conducting ink were fabricated on a plastic substrate by ink-jet printing. The properties of the formulated conducting ink containing carbon nanotubes, a conducting polymer, and additives were characterized and optimized. The conducting ink was applied to flexible thin-film transistors using ink-jet printing.

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Fabrication of organic thin film transistor using ink-jet printing technology

  • Kim, Dong-Jo;Jeong, Sun-Ho;Park, Bong-Kyun;Lee, Sul;Moon, Joo-Ho
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.1126-1129
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    • 2006
  • Here we developed a conductive ink which contains silver nanoparticles from which the electrodes for organic thin film transistor were directly patterned by ink-jet printing. To fabricate a coplanar type OTFT, solution processable semiconducting oligomer, ${\alpha},{\omega}-dihexylquaterthiophene$ (DH4T) was drop-cast onto between the ink-jet printed silver electrodes and I-V characteristics were measured.

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Evaluation and Development of Multi Thermal Bubble Ink Jet 3D Printing System (다중써멀버블 잉크젯방식의 3D 프린팅 시스템 개발 및 성능평가)

  • Shin, Mun Gwan;Bae, Sung Woo;Kim, Jung Su
    • Journal of the Korean Society for Precision Engineering
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    • v.32 no.9
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    • pp.787-792
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    • 2015
  • Recently, 3D printing technology is a hot issue in various industrial fields. According to the user's application, it allows for the free form fabrication method to be utilized in a wide range. The powder based fusion technique is one of the 3D printing methods. When using this method it is possible to apply the various binder jetting techniques such as piezo, thermal bubble jet, dispenser and so on. In this paper, a multi thermal bubble ink jet was integrated for jetting of powder binding material and developing a power fused 3D printing system. For high quality 3D printing parts, it needs an analysis and evaluation of the behavior of the thermal bubble ink jet head. In the experiment, a correlation between jetting binder quantity and layer thickness of powder was investigated, and a 3D part model was fabricated, which was used by measuring the scale factor.

Rheological behavior and ink-jet printing characteristics of aqueous ceramic complex ink (수계 세라믹 복합잉크의 유변학적 거동 및 잉크젯 프린팅 특성)

  • Kwon, Jong-Woo;Lee, Jong-Heun;Hwang, Kwang-Taek;Kim, Jin-Ho;Han, Kyu-Sung
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.28 no.3
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    • pp.123-129
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    • 2018
  • Ink-jet printing technology with ceramic ink of the four digital primary colors (cyan, magenta, yellow, and black; CMYK) can provide stable coloration even in the high-temperature firing process. Ceramic ink-jet printing can be widely applied in construction and ceramic industries due to the advantages of accurate and fast printing process of digital images for various products. Generally, organic solvent with proper viscosity and surface tension has been used in digital ink-jet printing process. However, the needs of ceramic ink without VOCs emission is increasing. In the present study, eco-friendly ceramic ink was synthesized by combining alumino boro-silicate glass frit and $CoAl_2O_4$ inorganic pigment based on an aqueous solvent that does not generate VOCs. The rheological properties and dispersion stability of aqueous ceramic ink were optimized. Jetting behavior and printing characteristics of the ceramic ink were also investigated in detail. As a result, the formulated aqueous ceramic complex ink showed a suitable jetting behavior without satellite drop by adjusting viscosity and surface tension. The ceramic ink can be printed on glass substrate with minimized spreading phenomena duo to high contact angle.

Inkjet Printable Transparent Conducting Oxide Electrodes

  • Kim, Han-Gi
    • Proceedings of the Materials Research Society of Korea Conference
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    • pp.59.2-59.2
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    • 2011
  • We have demonstrated ink-jet printed indium tin oxide (ITO) and indium tin zinc oxide (IZTO) electrodes for cost-efficient organic solar cells (OSCs). By ink-jetting of crystalline ITO nano-particles and performing a rapid thermal anneal at $450^{\circ}C$, we were able to obtain directly patterned-ITO electrodes with an average transmittance of 84.14% and a sheet resistance of 202.7 Ohm/square without using a conventional photolithography process. The OSCs fabricated on the directly patterned ITO electrodes by ink-jet printing showed an open circuit voltage of 0.57 V, short circuit current of 8.47 mA/cm2, fill factor of 44%, and power conversion efficiency of 2.13%. This indicates that the ITO directly-patterned by ink-jet printing is a viable alternative to sputter-grown ITO electrodes for cost-efficient printing of OSCs due to the absence of a photolithography process for patterning and more efficient ITO material usage.

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Digital Ink-jet Printing for Chitosan-treated Cotton Fabric

  • Choi P. S. R.;Yuen C. W. M.;Ku S. K. A.;Kan C. W.
    • Fibers and Polymers
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    • v.6 no.3
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    • pp.229-234
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    • 2005
  • In this paper, chitosan was suggested for using as a replacement for sodium alginate in the pretreatment print paste for digital ink-jet printing for cotton fabric. Pretreatment print pastes prepared from the mixture of chitosan and acetic acid with the appropriate viscosity gave satisfactory prints on the cotton fabric. Chitosan-treated cotton fabrics were digitally ink-jet printed with four different colors and the color fastness rating of the printed fabrics was satisfactory. Experimental results revealed the possibility of pre-treating the cotton with chitosan to replace the sodium alginate normally present in the pretreatment print paste recipe.

The Effect of the Pretreatment Print Paste Contents on Colour Yield of an Ink-jet Printed Cotton Fabric

  • Yuen, C.W.M.;Ku, S.K.A.;Choi, P.S.;Kan, C.W.
    • Fibers and Polymers
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    • v.5 no.2
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    • pp.117-121
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    • 2004
  • Optimum condition concerning the content of pretreatment print paste and steaming time for ink-jet printing was newly developed through the orthogonal analysis. The cotton fabric treated under the newly developed optimum condition could achieve a high level of colour yield similar to that of the commercially pretreated cotton fabric available in the market for ink-jet printing. The results were discussed thoroughly in this paper.

Reliability Evaluation of Silver Patterns Using Ink-jet Printing Technology (잉크젯 기술을 이용하여 인쇄된 실버 패턴의 신뢰성 분석)

  • Shin, Kwon-Yong;Kim, Myong-Ki;Lee, Sang-Ho;Hwang, Jun-Young;Kang, Heui-Seok;Kang, Kyung-Tae
    • Proceedings of the KIEE Conference
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    • pp.1450-1451
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    • 2008
  • To investigate the reliability of the conductive lines patterned by ink-jet printing, we evaluated the reliability of the ink-jet printed silver (Ag) patterns according to the guide lines built up as assessments methods in the production of conventional rigid printed circuit boards. The assessment methods include the uniformity of line width and space, adhesive strength, dielectric withstand, solder float, thermal shock test and pressure cooker test (PCT). To prepare assesment vehicles, different regular test patterns were created by Ag ink-jet printing on the same polyimide substrate for each of assessment methods.

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Fabrication of Thick Film Capacitors with Printing Technology (인쇄기법을 이용한 후막 캐패시터 제작)

  • Lee, Hye-Mi;Shin, Kwon-Yong;Kang, Hyung-Tae;Kang, Heui-Seok;Hwang, Jun-Young;Park, Moon-Soo;Lee, Sang-Ho
    • Proceedings of the KIEE Conference
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    • pp.100-101
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    • 2007
  • Polymer thick film capacitors were successfully fabricated by using ink-jet printing and screen printing technology. First, a bottom electrode was patterned by ink-jet printing of a nano-sized silver ink. Next, a dielectric layer was formed by the screen printing, then a top electrode was pattern by ink-jet printing of a nano-sized silver ink. The printed area of the dielectric layers were changed into $2{\times}2m^2$and $4{\times}2m^2$, and also the area of the electrodes were patterned with $1{\times}1mm^2$ and $1{\times}3mm^2$. The thickness of the printed dielectric layer was ranged from 1.1 to $1.4{\mu}m$. The analysis of capacitances verified that the capacitances was proportional to the area of the printed electrode. The capacitances of the fabricated capacitors resulted in one third of the calculated capacitances.

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