• Title, Summary, Keyword: ink-jet printing

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Fabrication of $TiO_2$-silver transparent thin films low-e coated on glass substrate by ink-jet printing (잉크젯 프린팅을 이용한 low-e $TiO_2$-silver 투명박막형성)

  • Yoon, Cho-Rong;Oh, Hyo-Jin;Lee, Nam-Hee;Guo, Yupeng;Kim, Byung-Whan;Kim, Sun-Jae
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.511-511
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    • 2007
  • Low-emissivity (low-e) coatings with visible transparency have attracted increased interest m reducing heat radiation loss through window panes from ecological and sustainable aspects. $TiO_2$-silver transparent thin films for low-e have good properties for UV and IR blocking as well as photocatalyst compared to that with commercial UV blocking films such as fluorine doped oxide (FTO), antimony doped tin oxide (ATO), etc. In this study, transparent $TiO_2$-silver thin films were prepared by successive ink-jet printing of commercial nano silver and $TiO_2$ sol. The $TiO_2$ sol, as ink for ink-jet printing, were synthesized by hydrothermal process in the autoclave externally pressurized with $N_2$ gas of 200 bar at $120^{\circ}C$ for 10 hrs. The synthesized $TiO_2$ sols were all formed with brookite phase and their particle size was several to 30 nm. At first nano sized silver sol was coated on glass substrate, after that $TiO_2$ sol was coated by ink-jet printing. With increasing coating thickness of $TiO_2$-silver multilayer by repeated ink-jet coating, the absorbance of UV region (under 400nm) and IR region (over 700nm) also increase reasonably, compared to that with commercial UV blocking films.

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Micronization of Ceramic Pigments for Digital Ink-Jet Printing Process (디지털 프린팅 공정을 위한 세라믹 안료의 미립화 거동 분석)

  • Lee, Ji-Hyeon;Hwang, Hae-Jin;Kwon, Jong-Woo;Kim, Jin-Ho;Hwang, Kwang-Taek;Han, Kyu-Sung
    • Korean Journal of Materials Research
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    • v.27 no.2
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    • pp.82-88
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    • 2017
  • Ink-jet printing techniques with ceramic ink, which contains ceramic pigments as colorant, are in increasingly use in the ceramic industry. Generally, ceramic pigments that are produced by conventional method show diameters of several micrometers; these micrometer sized particles in the ink-jet printing process can cause undesirable behavior such as print head nozzle clogging. To prevent this problem, a particle size reduction process is required. In this study, CMYK (cyan, magenta, yellow, black) pigments were synthesized via solid state method. Each pigment particle was milled to submicron size by an attrition mill. The effects of micronizing on the morphology, mechanical property, crystal structure and color property of the CMYK ceramic pigments were investigated by field emission scanning electron microscopy (FE-SEM), particle size analysis (PSA), X-ray diffraction (XRD) and CIE $L^{\ast}a^{\ast}b^{\ast}$.

Resistive Polymeric Humidity Sensor Fabricated with Ink-Jet Printing Technique (잉크젯 프린팅을 이용한 저항형 고분자 습도센서)

  • 공명선;금내리
    • Journal of the Microelectronics and Packaging Society
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    • v.11 no.1
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    • pp.49-57
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    • 2004
  • The modified polyionene polyelectrolyte inks were newly prepared and applied to the humidity-sensitive membrane of humidity sensor. The films were fabricated on the alumina substrate with comb-type gold electrode using a ink-jet printing technique. The copolymers of methyl methacrylate, acrylic acid, 2-hydroxyethyl methacrylate and [(2-methacryloyloxy)ethyl]trimethylammonium chloride were also prepared for the humidity-sensing material. which was fabricated by dip-coating method. Electrical measurements under various relative humidity were performed. The humidity-sensitive characteristics of sensors obtained by ink-jet printing technique were compared with that of dip-coating method. Humidity sensors showed a decrease in resistance as an increase of relative humidity and their resistance characteristics are in a close agreement each other.

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Studies on the Absorption Behavior of Dye and Pigment Ink for Ink-Jet Printing (잉크제트용 염료잉크와 안료잉크의 흡수거동에 관한 연구)

  • Lee, Hee-Myung;Lee, Yong-Kyu
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.37 no.2
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    • pp.47-56
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    • 2005
  • In technology of ink-jet coating, Image quality from correlation between paper and ink depends on the properties of printer and ink as well as those of paper material. Generally, According to the quality of ink that consists of colorants from 5 to 20 percent, It seems that absorption behavior of each ink is different. In this study, we studied to estimate the effects of dye and pigment ink on the absorption and printing properties using 2-type papers on the market and 3-type silica-based coated papers whose pore structure is different. Using the theory of contact angle to evaluate the absorption property, it was possible to measure the baseline length between paper and ink, volume of droplet as well as contact angle. Also, It was possible to calculate wetting energy(mN/m) and spreading coefficient(mN/m) using the surface tension of each ink. These measurements were available to estimate ink-jet qualities.

Development of Multi Piezo Ink-Jet Printing System Using Arbitrarily Waveform Generator (임의 전압파형발생기를 이용한 다중 피에조 잉크젯 3D 프린팅 장비 개발)

  • Kim, Jung Su;Kim, Dong Soo
    • Journal of the Korean Society for Precision Engineering
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    • v.32 no.9
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    • pp.781-786
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    • 2015
  • Recently, studies of 3D printing methods have been working in various applications. For example, the powder base method laminates the prints by using a binding or laser sintering method. However, the draw back of this method is that the post process is time consuming and does not allow for parts to be rapidly manufactured. The binding method requires the post process while the time required for the post process is longer than the manufacturing time. This paper proposes a UV curing binding method with an integrated piezo printing head system. The optimization of an arbitrary waveform generation for the control of a UV curable resin droplet was researched, in addition to developed optimized UV curing processes in multi nozzle ink jet heads.

Patterning and Sintering of Silver Nano Ink by the Ink-Jet Printing Technology (잉크젯에 의한 은나노 잉크의 패턴닝 및 소결)

  • Chun, Myoung-Pyo;Park, Myung-Sung;Myoung, Seong-Jae;Nam, Joong-Hee;Kim, Byung-Ik
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.329-329
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    • 2008
  • Silver nanoparticles were synthesized by polyol process and its particle size observed with TEM is about 20nm. Silver nanoparticle ink with metal content of 30wt% was prepared using solvent of ethanol and has low viscosity of 5cps (10rpm). This ink was printed by as ink-jet printer on Al2O3 and Silicone substrate. The resistivity and morphology of the printed film was investigated as a function of sintering termperature.

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Fabrication of Conductive Polymer Resistors Using Ink-jet Printing Technology (잉크젯 프린팅 기술을 이용한 전도성 폴리머 저항의 제작)

  • Lee, Sang-Ho;Kim, Myong-Ki;Shin, Kwon-Yong;Kang, Kyung-Tae;Park, Moon-Soo;Hwang, Jun-Young;Kang, Heui-Seok
    • Proceedings of the KIEE Conference
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    • pp.98-99
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    • 2007
  • This study has successfully demonstrated the direct fabrication of polymer resistors using ink-jet printing technology as an alternative patterning to traditional photolithography. The polymer resistors were fabricated just by two layer processes using a ink-jet printer (DMP-2800, Fujifilm Dimatix). First, resistive materials was patterned by a ink-jet printing with the desired width and length. Next, resistor fabrication was completed by printing metal contact pads on the both sides of the polymer resistor. We used poly (3,4-ethylene dioxythiophene) poly(styrenesulfonate)(PEDOT:PSS) for the resistor material and a nano-sized silver colloid for the metal contact pads. We characterized the electrical properties of PEDOT:PSS by measuring sheet resistance and specific resistance on a glass substrate. From analysis of the measured resistances, the electrical resistances of the polymer resistors linearly increased as a function of printed width and length of resistors. The accuracy of the fabricated polymer resistor showed about $0.6{\sim}2.5%$ error for the same dimensions.

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Review : The Advanced Inkjet Printing Technology - UV curable Jet Ink - (총설 : 최신 잉크제트 인쇄기술 - UV 경화형 제트잉크 -)

  • Jeong, Kyoung Mo;Won, Jong Myung;Lee, Yong Kyu;Koseki, Ken'ichi
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.46 no.2
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    • pp.46-56
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    • 2014
  • The aim of this reviews is to introduce the information concerning design of the UV-curable jet ink composition in order to provide a good adhesive property on non-porous surface. In order to clarify the viscosity dependence of flying speed for the UV curable jet ink, rheological analysis and observation of the flying state of the ink were carried out. The relationship between ink formulas and adhesive property on non-porous surface was investigated. It was examined the adhesive property of radical polymerization type UV curable jet ink included hydrogen abstraction type photo-initiator, it was expected that the strong adhesive strength can be obtained between the ink and non-porous surface in this study. UV curable jet ink with a slight amount of water was prepared. Optimum ratio of the cationic polymerization type UV curable jet ink shows an adequate adhesive strength towards two kinds of non-porous surface such as glass, poly(vinyl chloride) when tests were conducted on the ink jet-printing test machine.