http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Metal Grid Mesh 인쇄를 이용한 투명 전파 흡수구조 설계
윤선홍,이준상,이인곤,홍익표,Yoon, Sun-Hong,Lee, Jun-Sang,Lee, In-Gon,Hong, Ic-Pyo 한국군사과학기술학회 2016 한국군사과학기술학회지 Vol.19 No.3
In this paper, we designed the transparent circuit analog radar absorbing structure using printed metal grid mesh for enhanced optical transmittance. To obtain wideband electromagnetic absorption and enhanced optical transparency at X-band, we proposed the resistive FSS(Frequency Selective Surface) using printed metal mesh pattern on transparent glass with PEC(Perfect Electric Conductor) plane using ITO(Indium Thin Oxide) coating. We then fabricated the proposed structure to verify the simulation results obtained from commercial EM simulator. The comparisons between the simulation and measured results show good agreements. The results also show that the proposed radar absorbing structure can provide wideband reflection as well as better optical transparency. We can apply this proposed structure to the canopy of stealth aircraft and other stealth and security applications for visible transparency.
리버스옵셋 프린팅을 이용한 디지털 사이니지 디스플레이용 TFT 전극 형성 공정 연구
윤선홍(Sun Hong Yoon),이준상(Junsang Lee),이승현(Seung Hyun Lee),이범주(Bum-Joo Lee),신진국(Jin-Koog Shin) Korean Society for Precision Engineering 2014 한국정밀공학회지 Vol.31 No.6
The digital signage display is actively researched as the next generation of large FPD. To commercialize those digital signage display, the manufacturing cost must be downed with printing method instead of conventional photolithography. Here, we demonstrate a reverse offset printed TFT electrodes for the digital signage display. For the fabricated source/drain and gate electrode, we used Ag ink, silicone blanket, Cliche and reverse offset printer. We printed uniform TFT electrode patterns with narrow line width(10 μm range) and thin thickness(nm range). In the end the printing source/drain and gate electrode are successfully achieved by optimization of experimental conditions such as Cliche surface treatment, ink coating process, delay time, off/set process and curing temperature. Also, we checked that the printing align accuracy was within 5 μm.
곽채송,윤선홍 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-
In this work, we developed a flexible piezoelectric device was produced low-temperature-cured Ag (LTC-Ag) paste using screen-printing technology. The flexible piezoelectric electrodes based LTC-Ag paste was prepared by a facile method and low-cost technology. Also, LTC-Ag paste can be cured at a low-temperature of 80°C, so it can be printed without deformation of the substrate. Optical microscopy and FE-SEM images confirmed that the flexible LTC-Ag@PET electrodes have excellent printability and the Ag micro-nanoparticle was well coated onto PET. The LTC-Ag@PET electrodes showed a lower sheet resistivity of ~ 0.0431Ω·sq<sup>-1</sup>, ~ 3.0x10-5Ω·cm resistivity, and showed excellent adhesive 0 class at cross-cut test.
건물 내 주파수 선택적 공간 구현을 위한 인쇄전자 기술 기반 필름형 주파수 선택 표면구조 설계
이인곤,윤선홍,홍익표 한국전자파학회 2017 한국전자파학회논문지 Vol.28 No.12
본 논문에서는 건물 내에서 통신성능 저하의 원인이 되는 인접 채널의 신호를 제어하기 위해 대역 저지 특성을 갖는주파수 선택 표면구조를 설계하였다. 제안된 구조는 입사파의 편파 및 입사각에 안정적인 주파수 특성 구현을 위해 프랙탈 형상 기반의 소형화된 단위구조를 사용하였으며, 실제 적용성을 고려, 적은 제작비용으로 대량생산이 용이한 인쇄전자 기술을 이용하여 얇은 필름형 주파수 선택 표면구조를 제작하였다. 전통적인 회로제작 방식인 PCB 공정이 아닌 전도성 Ag 잉크를 이용한 스크린 프린팅 공정을 통해 생산성 및 환경성을 개선하였으며, 설계한 결과를 바탕으로 자유공간측정을 통해 입사파의 편파 및 입사각에 대한 안정적인 특성을 검증하고, 실제 건물 내벽에 적용 후, 수신 신호강도 측정을 통해 주파수 선택 성능을 확인하였다.
김준혁,윤선홍,배진형,차길용 (사)한국방사선산업학회 2023 방사선산업학회지 Vol.17 No.3
To effectively and safely manage the radiation exposure to nuclear power plant (NPP)workers in accidents, major overseas NPP operators such as the United States, Germany, and Francehave developed and applied realistic 3D model radiation dose assessment software for workers. Continuous research and development have recently been conducted, such as performing NPP accidentmanagement using 3D-VR based on As Low As Reasonably Achievable (ALARA) planning tool. In linewith this global trend, it is also required to secure technology to manage radiation exposure of workersin Korea efficiently. Therefore, in this paper, it is described the application method and assessmentresults of radiation exposure scenarios for workers in response to accidents assessment technology,which is one of the fundamental technologies for constructing a realistic platform to be utilized forradiation exposure prediction, diagnosis, management, and training simulations following accidents. First, the post-accident sampling after the Loss of Coolant Accident (LOCA) was selected as the accidentand response scenario, and the assessment area related to this work was established. Subsequently,the structures within the assessment area were modeled using MCNP, and the radiation source of theequipment was inputted. Based on this, the radiation dose distribution in the assessment area wasassessed. Afterward, considering the three principles of external radiation protection (time, distance,and shielding) detailed work scenarios were developed by varying the number of workers, the presenceor absence of a shield, and the location of the shield. The radiation exposure doses received by workerswere compared and analyzed for each scenario, and based on the results, the optimal accident responsescenario was derived. The results of this study plan to be utilized as a fundamental technology to ensurethe safety of workers through simulations targeting various reactor types and accident responsescenarios in the future. Furthermore, it is expected to secure the possibility of developing a data-basedALARA decision support system for predicting radiation exposure dose at NPP sites.