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정보저장시스템학회> 정보저장시스템학회논문집> 고효율 열전소재 2%Na-PbTe 의 소자화에 관한 연구

고효율 열전소재 2%Na-PbTe 의 소자화에 관한 연구

Study on Metalizing 2% Na-PbTe for Thermoelectric Device

김훈 ( Hoon Kim ) , 강찬영 ( Chan Young Kang ) , 황준필 ( Junp Hil Hwang ) , 김우철 ( Woo Chul Kim )
  • : 정보저장시스템학회
  • : 정보저장시스템학회논문집 10권2호
  • : 연속간행물
  • : 2014년 09월
  • : 32-38(7pages)

DOI


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초록 보기


						
Heat emission from the laser diode used in the optical disc drive and the defects from the increased temperature at the system have attracted attentions from the field of the information storage device. Thermoelectric  refrigerator is one of the fine solutions to solve these thermal problems. The refrigeration performance of thermoelectric device is dependent on the thermoelectric material’s figure-of-merit. Meanwhile, high electrical contact resistivity between metal electrode and p- and n-type thermoelectric materials in the device would lead increased total electrical resistance resulting in the degeneracy in performance. This paper represents the manufacturing process of the PbTebased material which has one of the highest figure-of-merit at medium-high-temperature, ~ 600K to 900 K, and the nickel contact layer for reduced electrical contact resistance at once, and the results showing the  decent contact structure and figure-of-merit even after the long-term operation environment.

UCI(KEPA)

I410-ECN-0102-2015-500-000165237

간행물정보

  • : 공학분야  > 전자공학
  • :
  • :
  • : 반년간
  • : 1738-6845
  • :
  • : 학술지
  • : 연속간행물
  • : 2005-2015
  • : 204


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1고효율 열전소재 2%Na-PbTe 의 소자화에 관한 연구

저자 : 김훈 ( Hoon Kim ) , 강찬영 ( Chan Young Kang ) , 황준필 ( Junp Hil Hwang ) , 김우철 ( Woo Chul Kim )

발행기관 : 정보저장시스템학회 간행물 : 정보저장시스템학회논문집 10권 2호 발행 연도 : 2014 페이지 : pp. 32-38 (7 pages)

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초록보기

Heat emission from the laser diode used in the optical disc drive and the defects from the increased temperature at the system have attracted attentions from the field of the information storage device. Thermoelectric  refrigerator is one of the fine solutions to solve these thermal problems. The refrigeration performance of thermoelectric device is dependent on the thermoelectric material's figure-of-merit. Meanwhile, high electrical contact resistivity between metal electrode and p- and n-type thermoelectric materials in the device would lead increased total electrical resistance resulting in the degeneracy in performance. This paper represents the manufacturing process of the PbTebased material which has one of the highest figure-of-merit at medium-high-temperature, ~ 600K to 900 K, and the nickel contact layer for reduced electrical contact resistance at once, and the results showing the  decent contact structure and figure-of-merit even after the long-term operation environment.

2LCD 패널 유리의 마모거동에 관한 연구

저자 : 곽지후 ( Ji Hoo Kwak ) , 신동갑 ( Dong Gap Shin ) , 김대은 ( Dae Eun Kim )

발행기관 : 정보저장시스템학회 간행물 : 정보저장시스템학회논문집 10권 2호 발행 연도 : 2014 페이지 : pp. 39-44 (6 pages)

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LCD panels are used widely in all sorts of devices. Since glass is the main material used to make the panels, scratch resistance is an important issue in acquiring high quality LCD panels. In this work the wear behaviors of  three types of commercially available LCD panel glasses were investigated. A pin-on reciprocating tribotester was used to perform the wear tests using the glass specimens against a stainless steel ball. The hardness of the specimens was initially obtained. It was shown that the wear amount varied with respect to the applied load as well as the type of glass. The wear pattern of the glass specimen was also characterized using confocal microscopy. It is expected that the results of this work will aid in improving the tribological properties of LCD panel glass.

3유전 알고리즘을 이용한 패치 안테나 형상 설계

저자 : 송성문 ( Sung Moon Song ) , 김철웅 ( Cheol Woong Kim ) , 임희승 ( Hee Seung Lee ) , 유정훈 ( Jeong Hoon Yoo )

발행기관 : 정보저장시스템학회 간행물 : 정보저장시스템학회논문집 10권 2호 발행 연도 : 2014 페이지 : pp. 45-49 (5 pages)

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This study deals with obtaining the optimal shape of a patch antenna via the topology optimization method in order to enhance its radiation efficiency. The genetic algorithm scheme is proposed for the optimization process to satisfy the design objective. As a result, the optimal patch shape through the proposed process shows highly improved radiation efficiency and reduced scattered effects. Commercial package COMSOL and Matlab programming are employed for the entire optimization and analysis processes.

4진폭 마스크와 2D 카오스 함수를 이용한 다중 이미지 광학 암호화

저자 : 김활 ( Hwal Kim ) , 전성빈 ( Sung Bin Jeon ) , 김도형 ( Do Hyung Kim ) , 박노철 ( No Cheol Park ) , 박영필 ( Young Pil Park )

발행기관 : 정보저장시스템학회 간행물 : 정보저장시스템학회논문집 10권 2호 발행 연도 : 2014 페이지 : pp. 50-54 (5 pages)

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Object image using DRPE(Double Random Phase Encryption) in 4f system is encrypted by space division method using amplitude mask. However, this method has the weakness for the case of having partial data of amplitude mask which can access the original image. To improve the security, we propose the method using the 2 dimension logistic chaos function which shuffles the encrypted data. It is shown in simulation results that the proposed   method is highly sensitive to chaos function parameters. To properly decrypt from shuffled encryption data, below 1e-5 % errors of each parameter should be required. Thus compared with conventional method the proposed shows the higher security level.

5레이저 프로젝터의 스페클 저감을 위한 광학 소자 설계 및 제작

저자 : 이재용 ( Jae Yong Lee ) , 김영주 ( Young Joo Kim )

발행기관 : 정보저장시스템학회 간행물 : 정보저장시스템학회논문집 10권 2호 발행 연도 : 2014 페이지 : pp. 55-60 (6 pages)

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Laser projector has many advantages of high brightness, high resolution and small size, but the huge drawback of image degradation called speckle which generated by coherence of laser and roughness of surface   interrupts their general use. There are many methods to reduce speckle pattern, but they need effective optical systems to  realize display to the far field with huge volume. We designed speckle reduction element by using microlens with controlled curvature to reduce spatial coherence. Vibration element was also applied to reduce temporal coherence which considered response time of eye. Designed element was fabricated by simple reflow method and imprinting method. From the results, the fabricated element performed 48.33% of speckle reduction efficiency and 41.29% of optical efficiency with a single doublet lens.

6압전효과에 의한 적층 세라믹 콘덴서의 거동 분석

저자 : 박노철 ( Byung Han Ko ) , 고병한 ( No Cheol Park ) , 박영필 ( Young Pil Park ) , 안영규 ( Young Gyu Ahn )

발행기관 : 정보저장시스템학회 간행물 : 정보저장시스템학회논문집 10권 2호 발행 연도 : 2014 페이지 : pp. 61-64 (4 pages)

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Vibration and acoustic noise arise from the Multilayer Ceramic Capacitor (MLCC) because of the piezoelectric effect of dielectric substance which consists of BaTiO3. However, the phenomenon is not analyzed clearly because the MLCC shows different behavior compare with ordinary piezoelectric substance like PZT. Thus, MLCC was tested under the several DC bias conditions and heat treatment effect was also tested and analyzed in this paper. From the test, MLCC shows not only piezoelectric effect but also another physical phenomenon like electrostriction. Also, it was verified that DC bias affect to the piezoelectric constant of MLCC.

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