• Title/Summary/Keyword: Chip on glass

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Wide Bandwidth RFID Tag Antenna Design for Protection of Connection Part between Chip and Antenna (칩과 안테나 사이 연결부 보호를 위한 RFID 태그 안테나의 광대역 설계)

  • Lee, Ji-Chul;Min, Kyeong-Sik
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.20 no.2
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    • pp.154-160
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    • 2009
  • This paper describes a wide bandwidth RFID tag antenna design for protection of connection part between chip and antenna. A proposed tag antenna size, a resonant frequency and bandwidth are $53{\times}10{\times}1\;mm$, 900 MHz and 800 MHz($500{\sim}1,300\;MHz$) at -10 dB below, respectively. The dielectric materials with different relative permittivity such as polyethylene, glass and silicon were applied for protection of connection part between the proposed antenna and chip on the way of whole and partial housing. The measured return loss and radiation pattern agreed well with the calculation results. The read range of the proposed tag antenna without any housing and of tag antenna with housing covered over all by silicon with 3 mm thickness were observed about 5 m and 4 m, respectively.

A Study on Electrical Properties of Dendrimer (미소전극형 DNA칩 어레이를 이용한 유전자의 검출)

  • Choi, Yong-Sung;Lee, Kyung-Sup
    • Proceedings of the KIEE Conference
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    • 2006.07c
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    • pp.1324-1326
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    • 2006
  • In this study, an integrated microelectrode array was fabricated on glass slide using microfabrication technology. Probe DNAs consisting of mercaptohexyl moiety at their 5-end were spotted on the gold electrode using micropipette or DNA arrayer utilizing the affinity between gold and sulfur. Cyclic voltammetry in 5mM ferricyanide/ferrocyanide solution at 100 mV/s confirmed the immobilization of probe DNA on the gold electrodes. When several DNAs were detected electrochemically, there was a difference between target DNA and control DNA in the anodic peak current values. It was derived from specific binding of Hoechst 33258 to the double stranded DNA due to hybridization of target DNA. It suggested that this DNA chip could recognize the sequence specific genes. It suggested that multichannel electrochemical DNA microarray is useful to develop a portable device for clinical gene diagnostic system.

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Technology Trend and Requirement of Mobile Displays Using Low-Temperature Poly-Si (LTPS) Technologies

  • Kwon, Oh-Kyong
    • 한국정보디스플레이학회:학술대회논문집
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    • 2007.08a
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    • pp.409-412
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    • 2007
  • A lot of research for system-on-panel(SOP) have been done to integrate display systems including data driver, gate driver, timing controller, DC-DC converter, and smart functions such as embedded touch screen, ambient brightness sensing and luminance control, finger printing on the glass. Recently, the cost of an one-chip driver IC with various functions has decreased rapidly, and new mobile display interface technologies have been introduced. So it is necessary to examine the feasibility of SOP for practical mobile applications. In this paper, we will re-examine LTPS technologies for mobile displays in terms of various aspects and discuss the practical limitations on SOP technology and future technology trend of mobile displays.

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Fabrication and Characteristics of Thermopneumatic-Actuated Polydimethylsiloxane Microvalve (열공압 방식의 Polydimethylsiloxane 마이크로 밸브의 제작 및 특성)

  • 김진호;조주현;한경희;김영호;김한수;김용상
    • The Transactions of the Korean Institute of Electrical Engineers C
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    • v.53 no.4
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    • pp.231-236
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    • 2004
  • A normally open thermopneumaticc-actuated microvalve has been fabricated and their properties are investigated. The advantages of the proposed microvalve are of the low cost fabrication process and the transparent optical property using polydimethylsiloxane (PDMS) and indium tin oxide (ITO) glass. The fabricated microvalves with in-channel configuration are easily integrated with other microfluidic devices on the same substrate. The fabrication process of thermopneumatic-actuated microvalvesusing PDMS is very simple and its performance is very suitable for a disposable lab-on-a-chip. The PDMS membrane deflection increases and the flow rates of the microchannel with microvalvels decrease as the applied power to the ITO heater increases. The powers at flow-off are dependent on the membrane thickness and the applied inlet pressure but are independent of the channel width of microvalves. The flow rate is well controlled by the switching function of ITO heater and the closing/opening times are around 20 sec and 25 sec, respectively.

Fabrication and Evaluation of Heat Transfer Property of 50 Watts Rated LED Array Module Using Chip-on-board Type Ceramic-metal Hybrid Substrate (Chip-on-board 형 세라믹-메탈 하이브리드 기판을 적용한 50와트급 LED 어레이 모듈의 제조 및 방열특성 평가)

  • Heo, Yu Jin;Kim, Hyo Tae
    • Journal of the Microelectronics and Packaging Society
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    • v.25 no.4
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    • pp.149-154
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    • 2018
  • This paper describes the fabrication and heat transfer property of 50 watts rated LED array module where multiple chips are mounted on chip-on-board type ceramic-metal hybrid substrate with high heat dissipation property for high power street and anti-explosive lighting system. The high heat transfer ceramic-metal hybrid substrate was fabricated by conformal coating of thick film glass-ceramic and silver pastes to form insulation and conductor layers, using thick film screen printing method on top of the high thermal conductivity aluminum alloy heat-spreading panel, then co-fired at $515^{\circ}C$. A comparative LED array module with the same configuration using epoxy resin based FR-4 PCB with thermalvia type was also fabricated, then the thermal properties were measured with multichannel temperature sensors and thermal resistance measuring system. As a result, the thermal resistance of the ceramic-metal hybrid substrate in the $4{\times}9$ type LEDs array module exhibited about one third to the value as that of FR-4 substrate, implying that at least triple performance of heat transfer property as that of FR-4 substrate was realized.

Microfluidic platform for voltammetric analysis of biomolecules (Microfludic 플랫폼을 이용한 생체 분자의 voltammetric 분석)

  • Chand, Rohit;Han, Da-Woon;Jha, Sandeep K.;Kim, Yong-Sang
    • Proceedings of the KIEE Conference
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    • 2011.07a
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    • pp.1686-1687
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    • 2011
  • A microfabricated chip with in-channel electrochemical cell using interdigitated gold electrode was fabricated for sensitive electrochemical analysis. The gold electrodes were fabricated on glass wafer using thermal evaporator and were covered using PDMS mold containing microchannel for analyte and electrolyte. The active area of each electrode was $250\;{\mu}m{\times}200\;{\mu}m$ with a gap of 200 ${\mu}m$ between the electrodes. Microelectrodes results in maximum amplification of signal, since the signal enhancement effect due to cycling of the reduced and oxidized species strongly depends on the inter electrode distance. Analytes such as methylene blue and guanosine were characterized using the fabricated electrodes and their electrochemical characteristics were compared with conventional bulk electrodes. The device so developed shall find use as disposable electrochemical cell for rapid and sensitive analysis of electroactive species.

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An Experimental Study on the Transcription Characteristics of Injection-Molded Micro Channel (마이크로채널 전사성 향상을 위한 사출성형공정 최적화 기초연구)

  • Kim, J.S.;Ko, Y.B.;Min, I.K.;Yu, J.W.;Kim, J.D.;Yoon, K.H.;Hwang, C.J.
    • Transactions of Materials Processing
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    • v.15 no.9 s.90
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    • pp.692-696
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    • 2006
  • Micro fabrication of polymeric materials becomes increasingly important. And it is considered as a low-cost alternative to the silicon or glass-based Micro Electro-Mechanical System(MEMS) technologies. In the present study, micro channels were fabricated via LiGA(Lithographie, Galvanoformung, Abformung) process used for Capillary Electrophoresis(CE) chip. Taguchi method was applied to investigate the effects of process conditions in injection molding(melt temperature, injection speed, mold temperature and packing pressure) on the transcription characteristics of the micro channel. It was found that the skin layer disturbs a formation of micro channel. Furthermore, mold temperature and injection speed were two important factors to affect the replication characteristics of micro channel.

Application of Bio-MEMS Technology on Medicine and Biology (Bio-MEMS : MEMS 기술의 의료 및 생물학 응용)

  • Jang, Jun-Geun;Jung, Seok;Han, Dong-Chul
    • Journal of the Korean Society for Precision Engineering
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    • v.17 no.7
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    • pp.45-51
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    • 2000
  • 지난 세기부터 MEMS 제작 기술을 이용하여 만들어진 시스템들을 의학이나 생물학적인 용도로 응용하기 위한 많은 연구가 활발히 이루어져 왔다. 기술적인 측면에서 이러한 연구들은 MEMS 분야의 초창기에 강조되어 온 표면 및 몸체 미세 가공 기술(surface & bulk micromachining)과 같은 미세 구조물 제작 기술의 발전에 힘입은 바 크다. 그러나 MEMS 기술이 점차 발전되어 오면서, 가공 기술이 고도화되고 미세 시스템의 구조가 점차 복잡해짐에 따라, 많은 연구들이 단순한 가공기술을 넘어 미세 시스템을 조립하고 집적화할 수 있는 기술, 접합 (bonding) 기술, 패키징 (packaging) 기술, 3차원 형상의 제작 기술, 실리콘(silicon)이나 유리(glass)가 아닌 다른 재료를 이용한 미세 가공 기술 등의 개발을 중심으로 이루어지고 있다.(중략)

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Fabrication of Microcantilever-based Biosensor Using the Surface Micromachining Technique (표면 미세 가공기술을 이용한 마이크로 캔틸레버의 제작과 바이오센서로의 응용)

  • Yoo Kyung-Ah;Joung Seung-Ryong;Kang C. J.;Kim Yong-Sang
    • The Transactions of the Korean Institute of Electrical Engineers C
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    • v.55 no.1
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    • pp.11-15
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    • 2006
  • We propose an optical and an electrical detection methods for detecting various bio-molecules effectively with microcantilevers. The microcantilevers were fabricated employing surface micromachining technique that has attractive advantages in terms of cost efficiency, simplicity and ability of fabricating in array. The fluid cell system for injection of bio-molecular solution is fabricated using polydimethylsiloxane (PDMS) and a fused silica glass. The microcantilever is deflected with respect to the difference of the surface stress caused by the formation of self-assembled bio-molecules on the gold coated side of the microcantilever. It detected cystamine dihydrochloride and glutaraldehyde molecules and analyzed individual concentrations of the cystamine dihydrochloride solution. We confirm that the deflections of bending-up or bending-down are occurred by the bio-molecule adsorption and microcantilever can be widely used to a ${\mu}-TAS$ and a lab-on-a-chip for a potential detection of various bio-molecules.

Effect of B-Bi-Zn Addition on the Permeabilities of Hexagonal-ferrite (B-Bi-Zn 첨가가 hexagonal-ferrite 특성에 미치는 영향)

  • 정승우;백승철;김성수;최우성
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2000.07a
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    • pp.204-207
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    • 2000
  • In this paper, we have studied the effect of doped with B-Bi-Zn on properties (microstructure, density, shrinkage, permeability as a function of frequency, etc.) of hexagonal-ferrite for high frequency chip-inductor material about several GHz. The permeability were analyzed by impedance analyzer(100 kHz~40 MHz) and network analyzer(30 MHz~3 GHZ). As a result of the characteristics, the B-Bi-Zn glass ceramic was used to lower the sintering temperature for additive as a function of frequency from 100 kHz to 1.8 GHz showed constant tends. The maximum imaginary value of complex permeability was observed near the resonance frequency of 2 GHz.

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