• 한국재료학회:학술대회논문집
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• 한국재료학회 2012년도 춘계학술발표대회
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• pp.63.1-63.1
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• 2012

In recent years, the functional inks for printed electronics that can be combined with a variety of printing techniques have attracted increasingly significant interest for use in low cost, large area, high performance integrated electronics and microelectronics. In particular, the development of solution-processable conductor, semiconductor and insulator materials is of great importance as such materials have decisive impacts on the electrical performance of various electronic devices, and, therefore, need to meet various requirements including solution processability, high electrical performance, and environmental stability. Semiconductor inks such as IGO, CIGS are synthesized by chemical solution method and microwave reaction method for TFT and solar cell application. Fine circuit pattern with high conductivity, which is valuable for flexible electrode for PCB and TSP devices, can be printed with highly concentrated and stabilized conductor inks such as silver and copper. Solution processed insulator such as polyimide derivatives can be use to all printed TFT device. Our research results of functional inks for printed electronics provide a recent trends and issues on this area.

• 반도체디스플레이기술학회지
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• 제19권1호
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• pp.79-84
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• 2020

Unlike a printing process, it is difficult to pattern organic thin films in the longitudinal (coating) direction using a coating process. In this paper, we have investigated the feasibility of patterning organic thin films using needles. To this end, we have slot-coated an aqueous poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) solution in the form of a fine stripe or large area and then applied the dual needle; one for discharging the main solvent of the underlying thin film and the other for sucking the dissolved thin film. We have found that the pattern width and depth increase as the moving speed of the plate decreases. However, it is observed that the sidewall slope is very gentle (the length of the slope is of the order of 200 ㎛) due to the fact that the discharged main solvent is widely spread and then isotropic etching occurs. With this scheme, we have also demonstrated that a fine stripe can be obtained by scanning the dual needle closely. To demonstrate its applicability to solution-processable organic light-emitting diodes (OLEDs), we have also fabricated OLED with the patterned PEDOT:PSS stripe and observed the insulation property in the strong light-emitting stripe.

• 한국의류학회지
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• 제31권8호
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• pp.1252-1261
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• 2007

The purpose of this study was to grasp the utilization of traditional Korean Patterns used for fashion cultural products. To achieve this purpose, this study examined the range of fashion cultural products through literature review, previous researches, and market surveys and analyzed the situation of fashion cultural products and the kinds, expression methods, expression techniques, and repeat styles of utilized patterns. The analysis results are as follows. First, in the use of traditional pattern, the most frequently-used fashion cultural products were small and inexpensive accessories, followed by fashion apparel, miscellaneous goods, and living cultural goods. Second, the most frequently-used traditional patterns were plant patterns, especially flower patterns. The next frequently-used ones were mixed patterns, especially in the mixture of flower and letter patterns, and $cloisonn\'{e}$ and flower patterns. The next frequently-used traditional patterns were animal patterns(especially butterfly patterns), followed by geometric patterns, lucky omen patterns, and letter patterns. In the expression methods of used patterns, most products except handicrafts preferred simplified patterns to real patterns. Finally, in the expression techniques of traditional patterns, the most frequently used technique was traditional embroidery, followed by the use of weaving fabrics such as fine gauze and brocade which are used for Hanbok. Also, transfer dyeing which is one of printing techniques, DTP(digital textiles printing), a mixed technique which adds embroidery to weaving fabrics, hand-painting, and a gilt technique were used. The results of this study suggest that most fashion cultural products except few designers' works attached weight to some specified patterns and expression techniques regardless of the characteristics of products since there is little understanding of a variety of patterns and are few researches and development on expression techniques.

• 한국인쇄학회지
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• 제29권2호
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• pp.1-13
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• 2011

The recent spotlight on electronic touch-screen display, a rapid breakthrough in the information society is evolving. Touch panel input device such as a keyboard or mouse without the use of, the on-screen character or a specific location or object on the person's hand touches a particular feature to identify the location of a panel is to be handled. The touch screen on the touch panel is used in the Ag paste is used mostly for low-curable paste. The thermal-curing paste according to the drying process of thermal energy consumption and improve the working environment of organic solvents have problems. In this study, Ag paste used in the non-thermal curing friendly and cost-effective UV curable paste was prepared. Current commercially available thermal-curable binder, was used instead of the flow characteristics of UV-curable oligomers and monomers with functional groups to give a single conductive Ag paste with the addition of a pattern could be formed. Ag paste as a result, thermal-curing adhesive, hardness, resistance and excellent reproduction of fine patterns and was available with screen printing environmentally friendly could see its potential as a patterning technology.

• 한국산업융합학회 논문집
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• 제27권3호
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• pp.685-692
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• 2024

Currently used heating elements are metal and non-metal heating elements, including various types of heaters, and resistance line heating elements have a problem of decreasing thermal efficiency over time, so to solve this problem, a planar heating element using high-purity carbon materials and oxidation-resistant inorganic compounds was applied. Through the manufacture of planar heating elements using CNT, ruthenium composite materials, and ruthenium oxide, physicochemical performance and capacity were increased, and instantaneous responsiveness was increased. Through thick film technology applicable to various base bodies, fine patterns were formed by the screening method in consideration of the fact that the performance of the heat source depends on the viscosity and pattern shape. The heating element was manufactured by thick film printing technology by mixing ruthenium oxide, CNT, Ag, etc. The characteristics of each paste were analyzed through viscosity measurement, and STS 430 was used as a base. Surface temperature and efficiency were measured by testing heaters manufactured for small wind tunnels and real-vehicle experiments. The surface temperature decreased as the air volume increased, and the optimal system boundary was found to be about 200 mm. Among the currently used heating elements, this paper manufactured a planar heating element using thick film technology to find out the relationship between air volume and temperature, and to study the surface temperature.

• 헤리티지:역사와 과학
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• 제57권1호
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• pp.126-144
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• 2024

고려시대 나전국화넝쿨무늬상자는 미세한 자개표면에 문양을 세기거나, 금속선을 이용해 넝쿨의 줄기를 표현하고, 금속선을 꼬아 각 문양의 경계를 구성하는 등 고려나전칠기의 대표적인 특징이 아주 세밀하게 표현되어있다. 현재 남아있는 고려시대 나전칠기는 경함 및 합의 형태를 가지고 있는 반면 이번 연구대상인 나전국화넝쿨무늬상자는 뚜껑과 몸체가 분리되는 상자의 형태를 하고 있어 제작목적 혹은 보관된 내용물을 추정하기 어려웠다. 이번 연구에서는 나전국화넝쿨무늬상자의 원형을 확인하기 위해 조형적인 특징을 확인하고, X선 투과촬영과 X선 형광분석을 통해 구조와 제작기법에 대해 규명하고자 하였다. 그리고 기존에 알려진 고려시대 나전칠기를 유형별로 분류 및 비교분석해 상자의 용도와 제작목적을 규명하고자 하였다. 조사결과 X선 이미지 상 바닥면과 속상자에서 직물이 확인되었다. 이를 통해 기물을 직물로 감싸는 목심저피칠기기법이 사용된 것을 확인할 수 있었다. 그리고 목리를 통해 복원부분으로 추정되는 부분의 판재구성과 기존 장석이 있었을 것으로 추정되는 부분을 확인할 수 있었으며 결구부에서 맞대임 방식으로 연결한 것을 확인할 수 있었다. 문양에 사용된 금속선은 X선 형광분석 결과 황동으로 판단된다. 조사결과를 근거로 현재 남아있는 고려시대 경함류 9점, 상자류 3점, 소상자류 2점 등 총 14점을 유형별로 분류해 유사성을 조사하였다. 이중 일본 개인소장 국화넝쿨무늬경함, 도쿠가와미술관 흑칠지국당초문나전경상, 영국박물관의 나전국당초문경함, 국내소장 나전칠국당초문합(소상자) 등 5점의 문양구성이 본 연구대상과 가장 유사하였다. 그리고 손상양상, 조형적 특성, 구조적 특징 등을 부위별로 대조한 결과 영국박물관의 나전국당초문경함의 형태가 나전넝쿨무늬상자의 원형으로 현재 형태로 변형된 것으로 추정된다. 마지막으로 이번 상자의 용도, 즉 제작목적을 확인하기 위해 당시 고려의 사회분위기와 비슷한 시기 제작된 고려대장경 인경본의 사례를 조사하였다. 당시 무신정권 이후 몽골의 침입을 겪으면서 국가의 안정과 개인의 명복을 빌기 위한 사경이 출현, 그리고 13세기 국내 인쇄술과 종이의 발전으로 점차 두루마리에서 절첩식 형태로의 전환기와 맞물려 경함에서 상자의 형태로 보관방식이 변경된 것으로 판단된다.