• 제목/요약/키워드: Multilayer structure

검색결과 481건 처리시간 0.028초

High efficiency organic light emitting-diodes (OLEDs) using multilayer transparent electrodes

  • Yun, Chang-Hun;Cho, Hyun-Su;Yoo, Seung-Hyup
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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    • pp.823-825
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    • 2009
  • We present multilayer transparent electrodes (MTEs) that resulted in organic light-emitting diodes (OLEDs) with the 90 % higher forward luminous efficiency and 30% higher external quantum efficiency (EQE) than conventional ITO based devices respectively. Optimization method of such MTE structure is investigated in consideration of both injection and optical structure.

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Low-e용 산화물 다층박막 IGZO/Ag/IGZO의 구조적, 광학적 특성 분석 (Structural and Optical Properties of Multilayer Films of IGZO / Ag / IGZO for Low Emissivity Applications)

  • 왕홍래;김홍배;이상렬
    • 한국전기전자재료학회논문지
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    • 제26권4호
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    • pp.321-324
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    • 2013
  • In this study, The RF magnetron sputter and evaporator was on glass substrates 30 mm ${\times}$ 30 mm OMO multilayer thin film structure is applied to the low-e. Structural and optical properties, a thin film was produced, the variable was placed into a variable deposition time of the oxide layer. According to the XRD measurement results there is no peak that satisfies the Bragg's law ($2dsin{\theta}=n{\lambda}$) which confirmed that it is an amorphous structure. RMS value of the results of the AFM measurement, has a roughness of less than 2 nm. transmittance measurements results, visible light region an average 80%, IR region 40% showed.

새로운 동적 멀티레이어 퍼셉트론 구조 (A new Dynamic Multilayer Perceptron Structure)

  • 김동원;오성권
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2000년도 추계학술대회 논문집 학회본부 D
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    • pp.806-808
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    • 2000
  • We propose a new Dynamic Multilayer Perceptorn(DMP) architecture for optimal model identification of complex and nonlinear system in this paper. The proposed DMP scheme is presented as the generic and advanced type based on the GMDH(Group Method of Data Handling) method for the limitation of GMDH under only two system input variables. It is worth stressing that the number of the layers and the nodes in each layer of the DMP are not predetermined, unlike in the case of the popular multilayer perceptron structure, but these are generated in a dynamic manner. The experimental part of the study comes with representative nonlinear static system. Comparative analysis is included and shows that a new DMP can produce the model with higher accuracy than previous other works.

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DGS 구조를 이용한 적층 LTCC 대역통과 필터의 설계 및 제작 (Design and fabrication of multilayer LTCC BPF using DGS structure)

  • 조영균;김형석;송희석;박규호
    • 한국전자파학회:학술대회논문집
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    • 한국전자파학회 2003년도 종합학술발표회 논문집 Vol.13 No.1
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    • pp.333-337
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    • 2003
  • In this paper, 5.2 GHz WLAN BPF(Band Pass Filter) using LTCC(Low temperature co-firing ceramic) Multilayer technology was simulated and manufactured. A DGS(Defected Ground structure) resonator with spiral ground pattern is used to shorten resonator size and improve circuit Q factor. And the equivalent circuit of BPF was suggested. The measured result shows good agreement with simulated data. Experimental results show the center frequency of 5.25GHz, the insertion loss of 0.14dB, and the 3-dB bandwidth of 350MHz (6%). The center frequency of BPF is 5.25GHz which is available for wireless LAN.

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STUDY OF MULTILAYER STRUCTURE USING X-RAY DOUBLE CRYSTAL DIFFRACTION

  • Wu, Yunzhong;Xu, Xueming;Wang, Weiyuan
    • 한국진공학회지
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    • 제4권S2호
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    • pp.30-33
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    • 1995
  • By using X-ray double crystal diffraction technique the multilayer structure composed of glass membrane, platinum film and $\alpha Al_2O_3$ substrate has been studied. It is found the stress is produced in the film by thermal mismatch within multilayer materials. The measuring results of thin film platinum resistors show that the stress were induce resistance change of device and different stress status will produce add resistance in different direction. Selecting proper glass material can make opposite stress in Pt film and opposite add resistance due to thermal mismatch. The reliability of Pt resistor has been improved with method of this stress compensation.

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High-efficiency Organic Light-emitting Diodes(OLEDs) with optimized multilayer transparent electrodes

  • Yun, Chang-Hun;Cho, Hyun-Su;Yoo, Seung-Hyup
    • Journal of Information Display
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    • 제11권2호
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    • pp.52-56
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    • 2010
  • High-efficiency organic light-emitting diodes (OLEDs) based on multilayer transparent electrodes (MTEs) are reported. The dielectric/metal/dielectric (DMD) multilayer electrode based on a thin silver layer achieved high sheet conductance as small as $6{\Omega}/sp$ and a tuning capability in the optical and electrical properties by engineering the inner and outer dielectric layers. In the conventional normal bottom-emitting structure, a DMD-based OLED can be fabricated with 90% higher forward luminous efficiency and 30% higher external quantum efficiency (EQE) compared to ITO-based devices. Special attention was paid to the optimization method of such MTE structure considering both the injection and optical structures.

콜레스테롤을 갖는 분자 다층 구조의 합성 (Synthesis of Cholesterol-Containing Molecular Multilayer Structure)

  • 신재섭
    • 멤브레인
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    • 제6권4호
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    • pp.213-218
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    • 1996
  • 중합반응을 할 수 있는 vinyl 기와 콜레스테롤 기를 갖는 계면활성제들을 합성하고, 이 계면활성제들을 물 속에서 sonication하여 vesicle 용액을 형성한 다음, 이 용액을 건조하여 분자들이 규칙적으로 배열된 분자 다층 구조를 갖는 막을 합성하였다. 이 막들을 UV를 이용하여 중합한 다음 분자량을 측정하여 중합성을 살펴보았으며, X-ray diffractometer로 분석하여 다층 구조를 어느 정도 잘하고 있는지극 살펴 보았다.

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Sintering of LTCC Tape on Alumina Substrates for Multilayered Structure

  • Kim, Hyo-Tae;Nam, Myung-Hwa;Chun, Byung-Joon;Kim, Jong-Hee
    • 한국분말야금학회:학술대회논문집
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    • 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part2
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    • pp.908-909
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    • 2006
  • The HTCC based multilayer structure plasma head unit have some difficulties in fabrication due to complicated post-processes, such as heat treatment at reduced atmosphere, re-bonding of each layer, and silver metallization. On the other hand, LTCC based technology provides relatively simple process for multilayer plasma unit except weak mechanical properties. To overcome this problem a combined scheme using both LTCC and HTCC technology has been developed in our group, recently. In this work, we report the structural design, materials selection, joining of LTCC with HTCC substrate, and co-firing process for the fabrication of multilayered atmospheric plasma head unit.

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A Fast Calculation of Apparent Soil Resistivity Using Exponential Sampling Method

  • Kang, Min-Jae;Kim, Ho-Chan
    • International Journal of Advanced Culture Technology
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    • 제7권4호
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    • pp.268-273
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    • 2019
  • The apparent soil resistivity is used for estimating multilayer soil parameters, such as, layer's depth and soil resistivity. The soil parameters are estimated by continuously revising those parameters until the error between the measured and calculated apparent soil resistivity reaches to allowable level. The equation for calculating the apparent soil resistivity is complicated and time consumed, because it is composed of an infinite integral which includes a zero order Bessel's function of the first kind. In this paper, a fast algorithm for calculating the apparent soil resistivity of horizontal multilayer earth structure is proposed using exponential sampling method.

집중 소자를 이용한 이중 대역 GSM/DCS용 적층형 다이플렉서의 설계 및 제작 (Design and Fabrication of Multilayer Diplexer for Dual Band GSM/DCS Applications using Lumped Elements)

  • 심성훈;강종윤;최지원;윤영중;김현재;윤석진
    • 한국세라믹학회지
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    • 제40권11호
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    • pp.1090-1095
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    • 2003
  • 본 논문에서는 고품질 적층형 수동 소자의 모델링 및 설계에 관하여 연구하였고, 설계된 수동 소자를 이용하여 안테나 스위치 모듈 내에 포함된 이중 대역 GSM/DCS 대역 분리용 적층형 다이플렉서를 설계$.$제작하여 그 특성을 고찰하였다. 적층형 수동 소자는 시스템의 소형화를 위해 인덕터는 정방형 스파이럴 구조로, 캐패시터는 입체적인 인터디지털 형태인 VIC 구조로 설계하였다. GSM 저역 통과 필터는 0.55 dB 이하의 삽입 손실과 12dB 이상의 반사 손실을 나타내며, 통과 대역 위쪽 저지 대역인 1800 MHz 부근에 감쇠극이 존재하도록 설계함으로써 DCS 통과 대역에서 26 dB 이상의 저지 특성을 나타내었다. DCS 고역 통과 필터는 0.82 dB 이하의 삽입 손실과 11 dB 이상의 반사손실을 가지며, 통과 대역 아래 쪽 저지 대역인 930 MHz 부근에 감쇠극이 존재하도록 설계함으로써 GSM 통과 대역에서 38 dB 이상의 저지 특성을 나타내었다.