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한국전기전자재료학회> 전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.)> Styrene-Butadiene-Styrene Block Copolymer 위 이온빔 조사를 이용한 주름 구조 생성 메커니즘 연구

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Styrene-Butadiene-Styrene Block Copolymer 위 이온빔 조사를 이용한 주름 구조 생성 메커니즘 연구

Mechanism of Wrinkle Formation on Styrene-Butadiene-Styrene Block Copolymer via Ion-Beam Irradiation

이주환 ( Ju Hwan Lee ) , 김대현 ( Dai-hyun Kim )
  • : 한국전기전자재료학회
  • : 전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.) 34권2호
  • : 연속간행물
  • : 2021년 03월
  • : 130-135(6pages)

DOI


목차

1. INTRODUCTION
2. METHOD FOR EXPERIMENT
3. RESULTS AND DISCUSSIONS
4. CONCLUSION
ORCID
REFERENCES

키워드 보기


초록 보기

Wrinkle patterns were fabricated on styrene-butadiene-styrene (SBS) block copolymer substrates using ion-beam (IB) irradiation with various intensities. The wavelength of the wrinkle pattern increased as the IB intensity was increased from 800 to 1,600 eV. IB irradiation-induced changes in the surface properties that were confirmed via physicochemical surface analyses. X-ray photoelectron spectroscopy analysis revealed chemical surface reformation due to the IB irradiation, resulting in C-O/C=O bonds after IB irradiation that were not reported before. These results indicate that the surface chemical modification caused by IB irradiation is strongly related to the surface modulus, which is important when fabricating wrinkle patterns. Furthermore, a strong IB irradiation induced a strong compressive strain; thus the size of the wrinkle pattern was increased.

UCI(KEPA)

간행물정보

  • : 공학분야  > 전기공학
  • : KCI등재
  • :
  • : 격월
  • : 1226-7945
  • : 2288-3258
  • : 학술지
  • : 연속간행물
  • : 1988-2021
  • : 4547


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1Effects of Plasma Treatment on the Reliability of a-IGZO TFT

저자 : Dongxu Xin , Ziyang Cui , Taeyong Kim , Junsin Yi

발행기관 : 한국전기전자재료학회 간행물 : 전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.) 34권 2호 발행 연도 : 2021 페이지 : pp. 85-89 (5 pages)

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High reliability thin film transistors are important factors for next-generation displays. The reliability of transparent a-IGZO semiconductors is being actively studied for display applications. A plasma treatment can fill the oxygen vacancies in the channel layer and the channel layer/insulating layer interface so that the device can work stably under a bias voltage. This paper studies the effect of plasma treatment on the performance of a-IGZO TFT devices. The influence of different plasma gases on the electrical parameters of device and its working reliability are reviewed. The article mentions argon, fluorine, hydrogen and several ways of processing in the atmosphere. Among these methods, F (fluorine) plasma treatment can maximize equipment reliability. It is expected that the presented results will form a basis for further research to improve the reliability of a-IGZO TFT.

2PZT계 압전 세라믹 파이버 복합체의 기계적 물성과 압전 풍력 에너지 하베스팅 특성

저자 : 이민선 ( Min-seon Lee ) , 박진우 ( Jin-woo Park ) , 정영훈 ( Young-hun Jeong )

발행기관 : 한국전기전자재료학회 간행물 : 전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.) 34권 2호 발행 연도 : 2021 페이지 : pp. 90-98 (9 pages)

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Piezoelectric ceramic fiber composite (PCFC) was fabricated using a planar electrode printed piezoelectric ceramic fiber driven in transverse mode for small-scale wind energy harvester applications. The PCFC consisted of an epoxy matrix material and piezoelectric ceramic fibers sandwiched by interdigitated electrode (IDE) patterned polyimide films. The PCFC showed an excellent mechanical performance under a continuous stress. For the fabrication of PCB cantilever harvester, five -PCFCs were vertically attached onto a flexible printed circuit board (PCB) substrate, and then PCFCs were serially connected through a printed Cu circuit. The energy harvesting performance was evaluated applying an inverted structure, which imples its free leading edge located at an open end but the trailing edge at a clamped end, to enhance strain energy in a wind tunnel. The output voltage of the PCB cantilever harvester was increased as the wind speed increased. The maximum output power was 17.2 μW at a resistance load of 200 kΩ and wind speed of 9 m/s. It is considered that the PCB cantilever energy harvester reveals a potential use for wind energy harvester applications.

3이온빔 스퍼터링으로 증착한 IZTO 박막의 결정화 거동과 전기적 특성 분석

저자 : 박지운 ( Ji Woon Park ) , 박양규 ( Yang Gyu Bak ) , 이희영 ( Hee Young Lee )

발행기관 : 한국전기전자재료학회 간행물 : 전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.) 34권 2호 발행 연도 : 2021 페이지 : pp. 99-104 (6 pages)

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Ion-beam sputtering (IBS) was used to deposit semiconducting IZTO (indium zinc tin oxide) thin films onto heavily-doped Si substrates using a sintered ceramic target with the nominal composition In0.4Zn0.5Sn0.1O1.5, which could work as a channel layer for oxide TFT (oxide thin film transistor) devices. The crystallization behavior and electrical properties were examined for the films in terms of deposition parameters, i.e. target tilt angle and substrate temperature during deposition. The thickness uniformity of the films were examined using a stylus profilometer. The observed difference in electrical properties was not related to the degree of crystallization but to the deposition temperature which affected charge carrier concentration (n), electrical resistivity (ρ), sheet resistance (Rs), and Hall mobility (μH) values of the films.

4열 증착법으로 제조된 CNT/Al/Cu 복합 파이버의 전기적 특성

저자 : 김종석 ( Jong-seok Kim ) , 신백균 ( Paik-kyun Shin )

발행기관 : 한국전기전자재료학회 간행물 : 전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.) 34권 2호 발행 연도 : 2021 페이지 : pp. 105-109 (5 pages)

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CNT fiber has been in the spotlight as a conductor, but the conductivity of CNT fibers do not match that of CNT. This study reveals that the conductivity of CNT fiber can be improved by depositing Al/Cu through vacuum evaporation. Cu is commonly used for deposition on CNT fibers. But low bonding strength of the interface between CNT and Cu could be a disadvantage. To overcome this, Al was deposited on the CNT fiber for forming aluminum carbide islands to increase the interfacial bonding strength. The conductivity characteristics were improved as the deposition time increased. The resistance was measured as a function of temperature, demonstrating that the temperature coefficient of resistance (TCR) is improved to be 241 ppm/℃ in comparison with that of as-received CNT fibers at -1,251 ppm/℃, when the CNT fibers are deposited with Al and Cu, respectively, for 90s and for 540s.

5경량화 태양광 모듈의 내구성 보완에 관한 연구

저자 : 정태웅 ( Taewung Jeong ) , 박민준 ( Min-joon Park ) , 김한준 ( Hanjun Kim ) , 송진호 ( Jinho Song ) , 문대한 ( Daehan Moon ) , 홍근기 ( Kuen Kee Hong ) , 정채환 ( Chaehwan Jeong )

발행기관 : 한국전기전자재료학회 간행물 : 전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.) 34권 2호 발행 연도 : 2021 페이지 : pp. 110-114 (5 pages)

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In this study, we fabricated light-weight solar module for various applications such as building integrated photovoltaics (BIPV), vehicles, trains, etc. Ethylene tetra fluoro ethylene (ETFE) film was applied as a material to replace the cover glass, which occupies more than 65% of the weight of the PV module. Glass fiber reinforced plastic (GRP) was applied to the ones with a low durability by replacing the cover glass to ETFE. Moreover, to achieve a high solar power conversion in this study, we applied a shingled design to weight reduced solar modules. The shingled module with GRP shows 183.7 W of solar-to-power conversion, and the output reduction rate after weight load test was 1.14%.

6용액법 기반의 유기태양전지 제작을 위한 투명전극 개발

저자 : 이수민 ( Sumin Lee ) , 강문희 ( Moon Hee Kang )

발행기관 : 한국전기전자재료학회 간행물 : 전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.) 34권 2호 발행 연도 : 2021 페이지 : pp. 115-120 (6 pages)

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In this study, composite transparent electrodes were fabricated either from a conductive polymer poly(3,4- ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) or silver nanowire (AgNW). Three transparent electrodes such as PEDOT:PSS, PEDOT:PSS and AgNW mixture, and AgNW were fabricated. As for a transparent electrode, measured sheet resistance values were 89.6, 60.6 and 28.6 Ω/sq, and the transmittance values were 80.2, 82.0 and 83.8% while surface roughness (Rq) values were 4.1, 8.1, 20.4 nm for PEDOT:PSS, PEDOT:PSS and AgNW mixture, and AgNW, respectively. To verify the overall performance of these composite electrodes, we applied these electrodes to the top electrode of the solution-processed organic solar cells (OSCs). PEDOT:PSS provided the best performance with a fill factor (FF) of 51.2% and a photoconversion efficiency (PCE) of 2.2%, while traditional metal top electrode OSC provided FF of 60.5% and PCE of 3.1%.

7머신비전을 위한 LED 조명시스템의 스트로브 제어 구동에 관한 연구

저자 : 김태화 ( Tae-hwa Kim ) , 이천 ( Cheon Lee )

발행기관 : 한국전기전자재료학회 간행물 : 전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.) 34권 2호 발행 연도 : 2021 페이지 : pp. 121-125 (5 pages)

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The machine vision technology has been widely used in the industrialized nations like the United States, Japan, and EU in the various industries from the late 1980s. Machine vision inspection system mainly consists of a camera, optics, illumination and an image acquisition system. Optimization of the illumination light source is very important. This paper shows a comparison between Pulse Width Modulation (PWM) control and strobe control in driving LED lighting system for machine vision. PWM control method has problems such as a temperature rising of LED and a flickering in image measurement for inspection. In contrast, the proposed strobe control method can suppress the temperature of LED light source below 40℃. Also, it can remove the flickering problem through a synchronization between a frame grabber and a camera shutter. Finally, the strobe control method was shown to extract clearer images with a high precision compared to PWM control method.

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We fabricated plate typed shunt resistors composed of carbon nanotube (CNT) and metal alloy for measuring DC current. CNT plates were prepared from dispersed CNT/Urethane solution by squeezing method. Cu/Ni alloys were prepared from composition-designed alloy wires for adjusting the temperature coefficient of resistance (TCR) by pressing them. As well, we fabricated a hybrid resistor by squeezing the CNT/Urethane solution on the metal alloy plate directly. In order to confirm the composition ratio of the Cu/Ni alloy, we used an energy-dispersed X-ray spectroscopy (EDX). Cross-section and surface morphology were analyzed by using a scanning electron microscopy (SEM). Finally, we measured the initial resistance of 2.35 Ω at 25℃ for the CNT paper resistor, 7.56 mΩ for the alloy resistor, and 7.38 mΩ for the hybrid resistor. The TCR was also measured to be -778.72 ppm/℃ at the temperature range between 25℃ to 125℃ for the CNT paper resistor, 824.06 ppm/℃ for the alloy resistor, and 17.61 ppm/℃ for the hybrid resistor. Some of the hybrid resistors showed a near-zero TCR of 1.38, -2.77, 2.66, and 5.49 ppm/℃, which might be the world best-value ever reported. Consequently, we could expect an error-free measurement of the DC current using this resistor.

9Styrene-Butadiene-Styrene Block Copolymer 위 이온빔 조사를 이용한 주름 구조 생성 메커니즘 연구

저자 : 이주환 ( Ju Hwan Lee ) , 김대현 ( Dai-hyun Kim )

발행기관 : 한국전기전자재료학회 간행물 : 전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.) 34권 2호 발행 연도 : 2021 페이지 : pp. 130-135 (6 pages)

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Wrinkle patterns were fabricated on styrene-butadiene-styrene (SBS) block copolymer substrates using ion-beam (IB) irradiation with various intensities. The wavelength of the wrinkle pattern increased as the IB intensity was increased from 800 to 1,600 eV. IB irradiation-induced changes in the surface properties that were confirmed via physicochemical surface analyses. X-ray photoelectron spectroscopy analysis revealed chemical surface reformation due to the IB irradiation, resulting in C-O/C=O bonds after IB irradiation that were not reported before. These results indicate that the surface chemical modification caused by IB irradiation is strongly related to the surface modulus, which is important when fabricating wrinkle patterns. Furthermore, a strong IB irradiation induced a strong compressive strain; thus the size of the wrinkle pattern was increased.

10방전신호 검출에 의한 히팅 케이블의 상태감시기술

저자 : 김동언 ( Dong-eon Kim ) , 김남훈 ( Nam-hoon Kim ) , 임승현 ( Seung-hyun Lim ) , 길경석 ( Gyung-suk Kil )

발행기관 : 한국전기전자재료학회 간행물 : 전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.) 34권 2호 발행 연도 : 2021 페이지 : pp. 136-141 (6 pages)

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Heating cables, widely used in office buildings, factories, streets and railways, deteriorate in electrical insulation during operation. The insulation deterioration of heating cables leads to electric discharges that can cause electrical fires. With this background, this paper dealt with a condition monitoring technique for heating cables by the analysis of discharge signals to prevent electrical fires. Insulation deterioration was simulated using an arc generator specified in UL1699 under AC operation, and the characteristic and propagation of discharge signals were analyzed on a 100 meter-long heating cable. Discharge signals produced by insulation deterioration were detected as a voltage pulse because they are as small as a few mV and they are attenuated through propagation path.
The frequency spectrum of discharge signals mainly existed in the range from 70 kHz to 110 kHz, and the maximum attenuation of the signal was 84.8% at 100 meters away from the discharge point. Based on the experimental results, a monitoring device, which is composed of a high pass filter with the cut-off frequency of 70 kHz, a comparator, a wave shaper and a microprocessor, was designed and fabricated. Also, an algorithm was designed to discriminate the discharge signal in the presence of noise, compared with the pulse repetition period and the number of pulse counts per 100ms. In the experiment, the result showed that the prototype monitoring device could detect and discriminate the discharge signals produced at every discharge point on a heating cable.

12
주제별 간행물
간행물명 수록권호

KCI등재

센서학회지
30권 3호 ~ 30권 3호

E²M-전기 전자와 첨단 소재(구 전기전자재료)
34권 3호 ~ 34권 3호

KCI등재

전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.)
34권 3호 ~ 34권 3호

KCI등재

센서학회지
30권 2호 ~ 30권 2호

E²M-전기 전자와 첨단 소재(구 전기전자재료)
34권 2호 ~ 34권 2호

KCI등재

전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.)
34권 2호 ~ 34권 2호

KCI등재

센서학회지
30권 1호 ~ 30권 1호

E²M-전기 전자와 첨단 소재(구 전기전자재료)
34권 1호 ~ 34권 1호

E²M-전기 전자와 첨단 소재(구 전기전자재료)
34권 1호 ~ 34권 1호

KCI등재

전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.)
34권 1호 ~ 34권 1호

KCI등재

센서학회지
29권 6호 ~ 29권 6호

E²M-전기 전자와 첨단 소재(구 전기전자재료)
33권 6호 ~ 33권 6호

KCI등재

전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.)
33권 6호 ~ 33권 6호

KCI등재

센서학회지
29권 5호 ~ 29권 5호

E²M-전기 전자와 첨단 소재(구 전기전자재료)
33권 5호 ~ 33권 5호

KCI등재

전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.)
33권 5호 ~ 33권 5호

KCI등재

센서학회지
29권 4호 ~ 29권 4호

E²M-전기 전자와 첨단 소재(구 전기전자재료)
33권 4호 ~ 33권 4호

KCI등재

전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.)
33권 4호 ~ 33권 4호

KCI등재

센서학회지
29권 3호 ~ 29권 3호
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