http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Organic Nonvolatile Memory Devices Fabricated by Using an Inkjet Printing Method
양용석,구재본,In-Kyu You 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.60 No.10
We are developing inkjet printing as a low cost, high throughput approach to the fabrication of single-layer organic memory devices. The organic memory devices were composed of poly(N-vinylcarbazole) (PVK) film with Ag nanoparticles (NPs). The inkjet printing was introduced to embed Ag NPs in the PVK film. The organic memory devices exhibited the behavior of resistive random access memory and on/off switching ratios of 103. This value was obtained through the post-annealing condition at 150oC. The current–voltage characteristics of the devices revealed rewritable and bipolar memory effects during several sweeps of voltage.
Electrical characteristics of InZnO3 transistors fabricated by reverse offset printing
양용석,박주현,유인규,홍성훈,윤호경,강영훈,이창진,조성윤 한양대학교 세라믹연구소 2015 Journal of Ceramic Processing Research Vol.16 No.2
The emerging technology of printed electronics will replace traditional photolithography, which requires costly materials, complex processes and expensive equipment, for the production of electronic circuits and displays. In this study, we fabricated thin-film transistors (TFTs) based on the materials of indium zinc oxide (IZO) semiconductor and Ag metal. The source-drain electrodes were fabricated on IZO film by a reverse offset printing method and annealed at various temperatures. The performance of the IZO TFTs with regard to the annealing temperature was investigated by examining the I-V characteristics. The electrical mobility of the TFTs increased as the annealing temperature increased. Inter-diffusion between the printed Ag metal and the IZO semiconductor was observed in the depth concentration profile of the Ag/IZO/SiO2/Si sample annealed at 250 ℃.
Characteristics of Via-Hole Interconnections Fabricated by Using an Inkjet Printing Method
양용석,In-Kyu You,구재본,이상석,임상철,Seong Youl Kang,노용영 한국물리학회 2010 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.57 No.61
Inkjet printing is a familiar technique that creates and releases droplets of fluid on demand and precisely deposits those droplets on a substrate. It has received increased attention for its novelty and ability to produce patterned and template material structures. In the application of electronic interconnection fabrication, drop-on-demand inkjet printers especially offer the advantages of contactless printing and eliminat the use of a die or photomask. In this study, we created a via-hole interconnecting structure through a polymer insulator layer by using an inkjet printing. When the droplets of Ag ink were dropped onto a PMMA/Au/Cr/SiO2/Si area and the Ag film was annealed at high temperatures, the Ag ink containing solvents penetrated into the PMMA layer and generated the conducting paths between the top Ag and the bottom Au electrodes by partial dissolution and swelling of the polymer. The surface and the cross-sectional topologies of the formed via-holes were investigated by using an optical microscope and a field emission transmission electron microscope.
Influence of a Self-assembled Monolayer on Indium-Zinc-Oxide Semiconductor Thin-film Transistors
양용석,유인규,홍성훈,Ju-hyeon Park,윤호경,Young Hun Kang,Changjin Lee,Song Yun Cho 한국물리학회 2014 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.65 No.10
The fabrication of an active-matrix liquid-crystal display by using printing processes offers thepotential to reduce the number of photolithography steps and the manufacturing costs. In thisstudy, we prepare the indium-zinc-oxide (IZO) thin-film transistors (TFTs) by using non-vacuumprocesses such as inkjet printing. The self-assembled monolayers of hexadecanethiol (HDT) on thesurface of the oxide semiconductor prior to the inkjet printing of Ag were employed to modify theelectric barrier between the IZO and the printed Ag. The field-effect mobility of the IZO TFTswith 0.5-mM HDT treatments and with the inkjet-printed Ag electrodes that were investigated byusing their current-voltage characteristics was approximately 0.36 cm2/Vs.
다중 경로 페이딩 환경에서 주파수 영역 비례 적응형 등화알고리즘 제안과 CP최소화에 관한 연구
양용석,이규대 한국인터넷방송통신학회 2007 한국인터넷방송통신학회 논문지 Vol.7 No.5
OFDM(Orthogonal Frequency Division Multiplexing)방식은 보호 구간 및 심벌 및 채널 간 간섭(ISI/ICI)을 방지하는 특성을 가져 다중 경로 페이딩(Multi Path Fading) 환경에 내성이 강하지만 전송신호의 PAPR (Peak-to-Average Power Ratio)이 크다. SC-FDE(Single Carrier with Frequency Domain Equalization)방식은 OFDM과 유사한 성능을 가지면서 상대적으로 PAPR이 적은 반면 등화기가 복잡하다. 논문에서는 SC-FDE시스템을 위한 주파수 영역에서 비례 적응형 등화기를 제안하여, 실내 및 도시지역, LOS 및 NLOS환경과 2GHz ~ 11GHz 광대역에서 성능을 확인하고, 또한 CP(Cyclic Prefix)를 최소화시켜 성능을 분석함으로 802.11 및 802.16 등에 적용할 수 있음을 제시하였다. 또한 동일조건의 OFDM시스템과 성능을 비교하여 수렴속도가 빠르고 단말기의 복잡도를 줄일 수 있음을 시뮬레이션을 통해 증명하였다. In the multipath fading channel, OFDM(Orthogonal Frequency Division Multiplexing)system possess the characteristics of ISI/ICIwith prefix, but a weak point of circuit complexity and PAPR problem. SC-FDE(Single Carrier with Frequency Domain Equalization) performance is similar to OFDM system, but equalizer is complex in frequency domain. In this paper, simple proportional equalizer offer for SC-FDE system, it useful method in the 2GHz ~ 11GHz channel model such as indoor, outdoor, SUI and show CP minimize for IEEE802.11/16. It prove using MATLAB simulation, speed faster then OFDM system, reduce terminal complexity in same test condition.
$2GHz{\sim}10GHz$ 무선 채널 환경에서 비례 적응형 등화기를 이용한 SC-FDE 시스템 구현과 성능분석
양용석,이규대,Yang, Yong-Seok,Lee, Kyu-Tae 한국통신학회 2007 韓國通信學會論文誌 Vol.32 No.4C
In the multipath fading channel, OFDM(Orthogonal Frequency Division Multiplexing)system possess the characteristics of ISI/ICIwith prefix, but a weak point of circuit complexity and PAPR problem. SC-FDE(Single Carrier with Frequency Domain Equalization) performance is similar to OFDM system, but equalizer is complex in frequency domain. In this paper, simple proportional equalizer offer for SC-FDE system, it useful method in the $2GHz{\sim}\;10GHz$ channel model such as indoor, outdoor, SUI. It prove using MATLAB simulation, speed faster then OFDM system, reduce terminal complexity in same test condition. 다중 경로 페이딩 환경에서 OFDM(Orthogonal frequency Division Multiplexing)방식은 보호 구간 및 주파수영역 등화로 심벌 및 채널 간 간섭을 방지하는 특성을 가지는 반면 전송신호의 PAPR(Peak-to-Average Power Ratio)크다는 것이다. SC-FDE(Single Carrier with Frequency Domain Equalization)방식은 OFDM과 유사한 성능을 가지면서 상대적으로 PAPR이 적은 반면 등화기가 복잡하다. 본 논문에서는 SC-FDE시스템을 위한 주파수영역 비례 적응형 등화기를 제안하고, $2GHz\;{\sim}\;10GHz$ 대역의 다양한 채널모델 환경 하에서 성능을 분석함으로 802.11 및 802.16 등에 효과적으로 적용할 수 있음을 제시하였다. 아울러 동일조건의 OFDM시스템과 성능을 비교하여 수렴속도가 빠르고 단말기의 복잡도를 줄일 수 있음을 시뮬레이션을 통해 증명하였다.