• 한국인쇄학회지
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• 제15권1호
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• pp.85-96
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• 1997

The color difference between original and printed copy is affected mainly by ink trapping and optical properties of overprinted ink layer. Since the general expression itself about ink trapping is affected also by the optical properties, the analysis of color difference using the ink trapping only cannot be certain. This study will show a new approaching method for optical analysis of spectral reflectance and the effect of printing sequence on color difference in multi-color overprints under the condition of excluding completely the ink trapping problems by means of using transparent film as a substrate.

• 한국방사선학회논문지
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• 제14권4호
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• pp.391-396
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• 2020

본 연구는 Gd₂O₂S:Tb 형광체 화합물을 사용하여 비파괴검사 중 방사선투과검사에 적용할 수 있는 형광체 증감지를 개발하였다. 또한 이러한 형광체 증감지를 FE-SEM, RMS 및 RDS 분석을 통해 형광체 증감지의 영상 균일도를 분석하였다. 또한, 응력-변형 특성 곡선 측정을 통해 Gd₂O₂S:Tb 형광체 스크린의 인장강도, 신장률 및 탄성계수를 평가하였다. 실험 결과, RSD 값이 평가 기준인 10% 이내로 우수한 영상균일도를 가지는 것으로 평가되었다. 또한, 물리적 특성 평가 결과, 인장 강도는 1.1760 N/㎟이며, 파단시 인장강도는 1.1515 N/㎟로 나타났다. 이러한 결과로부터 본 연구에서 제작된 상온 겔-프린팅 제조법을 이용하여 제작된 Gd₂O₂S:Tb 형광체 스크린은 방사선 투과검사용 디지털 방사선 검출기에 적용이 가능할 것으로 사료된다.

• 한국마이크로전자및패키징학회:학술대회논문집
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• 한국마이크로전자및패키징학회 2001년도 The IMAPS-Korea Workshop 2001 Emerging Technology on packaging
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• pp.151-156
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• 2001

Using the photoimageable thick film conductors, $25\mu\textrm{m}$ line widths and $25\mu\textrm{m}$ spaces can be obtained. Test patterns are made by green tape lamination, paste printing, exposing to UV light, developing in an aqueous process and cofiring. Postfiring method using alumina substrate can be also applied to fine line formation. Series gap resonator formed by photopatterning process showed the improved signal transmission characteristics compared to that obtained by conventional screen printing.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2007년도 추계학술대회 논문집
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• pp.246-247
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• 2007

(Ba,Sr,Ca)$TiO_3$ powders, which were prepared by sol-gel method using a solution of Ba-acetate, Sr-acetate and Ca-acetate and Ti iso-propoxide, were mixed with organic vehicle and the BSCT thick films were fabricated by the screen-printing techniques on high purity alumina substrates. The structural and dielectric properties were investigated for various $Dy_2O_3$ doping contents. As a result of thermal analysis, the exothermic peak was observed at around $670^{\circ}C$ due to the formation of the polycrystalline perovskite phase. All BSCT thick films, sintered at $1420^{\circ}C$ for 2h, showed the typical XRD patterns of perovskite polycrystalline structure and no pyrochlore phase was observed. The average grain size of the specimens decreased with.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2002년도 하계학술대회 논문집
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• pp.478-481
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• 2002

We carried out the experiments for fabricating $Bi_{2}Sr_{2}Ca_{2}Cu_{3}O_{x}$(Bi2223) superconductor thick films on Cu tapes. Cu-free (Bi,Pb)-Sr-Ca-0 powder mixtures were screen- printed on Cu tapes and heat-treated at 840-$860^{\circ}C$ for several minutes in air. Surface microstructures and phases of films were analyzed by XRD and optical microscope. The electric properties of superconducting films were examined by the four probe method. At heat-treatment temperature, the printing layers were in a partially molten state by liquid reaction between CuO in the oxidized copper tape and the precursors which were printed on Cu tapes. During the heat-treatment procedure, it is thought that Bi2223 superconducting particles nucleate at interfaces between Bi2212 phase and liquid.

• 한국세라믹학회지
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• 제41권1호
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• pp.30-35
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• 2004

스크린 인쇄법 및 PZT sol 처리의 복합공정을 적용하여 $30{\mu}m$ 두께의 PMW-PZT 후막을 Pt/$TiO_2$/$SiN_x$Si 기판위에 제작하였다. 그 결과 PZT sol 처리 횟수가 증가함에 따라 후막의 소결 밀도가 증가하고 전기적, 압전 특성의 증진되는 것을 관찰할 수 있었다. $800^{\circ}C$에서 소결한 10회 sol 처리한 PMW-PZT 후막은 745의 유전상수 및 155 pC/N의 $d_33$ 값을 나타내었다.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.II
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• pp.1447-1450
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• 2005

Carbon nanotube field emission display devices were fabricated using screen printing techniques. The CNT pastes are composed of organic binder, CNT, and additive materials such as glass frit, silver or ITO powders. The change in mixing ratio of various organic binders in CNT paste varied the electron emission characteristics. With increasing the contents of additive materials in CNT paste, turn-on field were increased, leading to decrease in electron emission current. The post-treatment process in this study induced the vertical alignment of carbon nanotubes on glass, resulting in the improvement of electron emission uniformity.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2012년도 제42회 동계 정기 학술대회 초록집
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• pp.546-546
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• 2012

Traditional screen printing is still a dominant method to print electrodes on c-Si solar cells. In order to achieve higher efficiency for c-Si solar cells, improvement of the electrode material is one of the key approaches. Shadowing loss can be reduced by using high aspect ratio finger electrode with width of finger electrode less than 80um. The rheological properties of Ag paste for applying c-Si solar cells are improved by using Ag nanowires. The printing properties including the aspect ratio of printed electrode can be improved with higher Thixotropic index (T.I.) values.

• 한국인쇄학회지
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• 제31권1호
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• pp.51-64
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• 2013

When it comes to current growth trend for the printing process in Asia printing market, offset printing, gravure printing and screen printing are reduced respectively -4%, -19%, -55%. In judging from the fact, the change in the printing production system from mass production on small amount to small production on mass amount is the biggest issue. For this reason, digital printing shows the significant growth. According to the increase of the growth 78% for electro photography way and 67% for ink-jet, it's not enough to catch up with digital printing which is increasing as time goes by to equip with hardware like as digital press. There's been necessary to install the BOD(Book on Demand) system which is the advanced and regular publication edit solution based on web-to-print model in the prepress, and it has made the BOD system be considered in relation to maximization of efficiency and production. Therefore, this research tries to step forward from the POD concept, which is refired to "Print along with the ordered quantities, the ordered appropriate time and the demanded place", so that it could expand the range of the printing/publishing environment using the BOD system, the order-made publication based on automatically operating template. And it tried to make the relation to digital web press on ink-jet method which is adequate to "mass production on small amount" with such advanced concept. This research also aims to use actively BOD solution model to promote the productivity of labor, and then to produce the printings across all related industries, which means to manufacture maximally the products on the shortest time at minimum place through PC equipments.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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• pp.544-547
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• 2004

Glass frits for dielectric layers are mostly used for screen printing process. Several additives have already been known to be well matched with lead-oxide glasses system. The use of lead oxide, however, creates environmental problems, so many recent studies on lead-free glasses compositions have been carried out. A study of the suitability between additives and lead-free glass system is needed. In this study, we have used a screen-printing method to make thick films of lead-oxide glass and lead-free glass using different additives, and analyzed and compared the transmittance of the thick films.