• Journal of the Microelectronics and Packaging Society
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• v.22 no.4
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• pp.83-89
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• 2015

In this paper, we propose a fabrication technique for enhanced electrical properties of piezoelectric thick films with excellent patterning property using sol-infiltration and a direct-patterning process. To achieve the needs of high-density and direct-patterning at a low sintering temperature (< $850^{\circ}C$), a photosensitive lead zirconate titanate (PZT) solution was infiltrated into a screen-printed thick film. The direct-patterned PZT films were clearly formed on a locally screen-printed thick film, using a photomask and UV light. Because UV light is scattered in the screen-printed thick film of a porous powder-based structure, there are needs to optimize the photosensitive PZT sol infiltration process for obtaining the enhanced properties of PZT thick film. By optimizing the concentration of the photosensitive PZT sol, UV irradiation time, and solvent developing time, the hybrid films prepared with 0.35 M of PZT sol, 4 min of UV irradiation and 15 sec solvent developing time, showed a very dense with a large grain size at a low sintering temperature of $800^{\circ}C$. It also illustrated enhanced electrical properties (remnant polarization, $P_r$, and coercive field, $E_c$). The $P_r$ value was over four times higher than those of the screen-printed films. These films integrated on silicon wafer substrate could give a potential of applications in micro-sensors and -actuators.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2006.05a
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• pp.593-594
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• 2006

A novel thermal transfer method was developed to form the phosphor screen for VPT(Video Phone Tube). This method have advantages of simple process, clean environment, saving raw material and running-cost comparison of electrodeposition, spin coating of conventional methods. But now applying phosphor screen for thermal transfer method has been formed three layers (phosphor layer, ITO layer and thermal adhesive layer) on the PET film as substrate. This is complex process, run to waste of raw-material and require of high cost. Also ITO paste at present has been imported from Japan. To improve these problems, we have manufactured phosphor screen formed by two layers (phosphor layer and ITO layer). We have developed ITO paste that had both conductive and excellent thermal transfer abilities, made it of domestic raw-material.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2006.05a
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• pp.591-592
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• 2006

We studied about the manufacture of the drain-source contacts for OTFTs(organic thin-film transistors) by using screen printing method. The conductive fillers used Ag and carbon black. The conductive contacts with $100{\mu}m$ of channel length were screen printed on a silicon dioxide gate dielectric layer and, the pentacene semiconductor was deposited via vacuum deposition. As a result of studying various conductive pastes, we could obtain the OTFTs which exhibited field-effect behavior over arrange of drain-source and gate voltages, similar to devices employing deposited Au contacts. By using screen-printing with conductive paste, the contacts are processed at low temperature, thereby facilitating their integration with heat sensitive substrates.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2008.11a
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• pp.265-266
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• 2008

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.941-942
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• 2013

• Proceedings of the Korean Ceranic Society Conference
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• 2004.10a
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• pp.99.2-99.2
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• 2004

• Proceedings of the Korean Ceranic Society Conference
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• 2003.04a
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• pp.115.1-115
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• 2003

• Proceedings of the International Microelectronics And Packaging Society Conference
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• 1999.11a
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• pp.45-48
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• 1999

• 프린팅코리아
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• s.6
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• pp.84-84
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• 2002

한국인쇄학회(회장 신종순)는 지난 11월 1일 충남 금산에 위치한 중부대학교에서 2002년도 추계 학술대회 및 창립 20주년 기념식을 개최했다. 제1발표장에서는 CTP. CTF 스캐너의 대응전략과 이해(마이크로큐닉스 정해성 부장), 러시아의 인쇄산업 현황(러시아 국립 모스크바 화상출판대학 알렉산더 총장), 디자인과 인쇄(우정디자인기획 정민교 실장), 잡지광고의 레이아웃요소와 제품 범주에 관한 연구(중부대학교 이광숙 교수)에 대한 발표와 질의시간을 가졌다. 제2발표장에서는 플렉소 제판공정에서의 노광 및 수세시간에 따른 판의 변화에 관한 연구(중부대학교 태종필), 탄산칼슘 함량에 따른 잉크의 구조 회복성 변화에 관한 연구(인천알림방 이규일), 안료 함량에 따른 잉크의 레올로지 성질의 변화(광명잉크 박정민), 오존처리에 의한 수용성 폐 잉크 색도 분해 연구(한국기계연구원 손영수), 후막인쇄물의 잉크층 두께와 스크린 인쇄조건에 관한 연구(한국기계연구원 임규진), 집약형(C1 Type) 플렉소 인쇄기 설계 기술(한국기계연구원 최찬호)에 대한 발표와 질의시간을 가졌다. 본지에서는 이날 학술발표회에서 발표된 'CTP. CTF 스캐너의 대응전략과 이해'와 자료로서 공개된 '러시아 내에서 디지털 인쇄의 적용분야 연구', 최근 한국인쇄학회지에 발표된 '21세기 인쇄 정보산업의 발전 전략과 연구'에 대한 자료를 요약, 정리했다.

• Archives of design research
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• v.14 no.4
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• pp.157-165
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• 2001

The method to make ceramic pigments for 4 colour instead of ink in the process of the of set-printing and put them on the decal paper in the ceramic industry has been used to produce complicated images such as photographs or famous masterpieces. Offset-printing which is the production method for mass production, had enough worth to suffer the past high price of the production line. But today it is not suitable for the production method of small quantity and many kinds corresponding to needs for the various tastes and designs of consumers. Therefore I will put 4 colour printing method on the silkscreen, handiwork, suitable for the production method for small quantities and many variations to develop the methods that permit to cost effectively reproduce complex, high resolution, multicolor images. The study is expected to give value to ceramists who do various works and to be offered as the foundation in the field of design and expression.