• 제목/요약/키워드: 국상

검색결과 81건 처리시간 0.028초

3C-SiC/Si 에피층 성장과 Ga 불순물 효과

  • 박국상;김광철;김선중;서영훈;남기석;이형재;나훈균;김정윤;이기암
    • 한국결정성장학회:학술대회논문집
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    • 한국결정성장학회 1997년도 Proceedings of the 13th KACG Technical Meeting `97 Industrial Crystallization Symposium(ICS)-Doosan Resort, Chunchon, October 30-31, 1997
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    • pp.141-144
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    • 1997
  • High quality 3C-SiC epilayer was grown on Si(111) at 125$0^{\circ}C$ using chemical vapor deposition(CVD) technique by pyrolyzing tetramethylsilane(TMS). 3C-SiC epilayer was doped by tetramethylgallium(TMGa) during the CVD growth. The crystallinity of 3C-SiC was significantly enhanced by doping the gallium impurity.

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호핑법에 의한 이온 공간전하 분극 열자극전류의 수치해석 (Numerical analysis of thermally stimulated current due to lonic space charge polarization by hopping method)

  • 김의균;국상훈
    • E2M - 전기 전자와 첨단 소재
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    • 제4권1호
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    • pp.53-64
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    • 1991
  • 절연체중에 있는 하전입자의 거동은 절연재료의 특성에 많은 영향을 준다. 본 연구에서는 호핑모델에 의한 수치해석법을 TSC특성과 쌍극자분극에 대한 TSC특성은 차이가 있었다. 실험과 대응시켜 가동이온에 관한 물성정수의 평가를 하였다. 호핑모델에 의해서 불포화 TSC와 I-V특성의 수치계산을 하였다.

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전력설비용 Polyethlene의 열자극 표면전위법에 의한 공간저하 측정에 관한 연구

  • 이경섭;국상훈
    • 한국조명전기설비학회:학술대회논문집
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    • 한국조명전기설비학회 1990년도 추계학술발표회논문집
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    • pp.63-67
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    • 1990
  • Many characteristics of space charge in insulating materials which is the cause of insulation break down was measured quantita-tively. It was confirmed that injection charge of the electrode was trapped to form mainly space charge. In the present paper, collecting potential was determined by TSSP and mean depths of space distribution was investigated by measuring variation quantity of space charge under the different bias time, voltage and temperature. Experimental resuts was in good agreement with model analysis on a stedy state.

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절연유의 교류부분방전에 미치는 첨가물의 영향에 관한 연구 (A study on effect of additives upon A.C. partial discharge in insulating oil)

  • 국상훈
    • 전기의세계
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    • 제29권8호
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    • pp.532-537
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    • 1980
  • Effect of Argon and Sulfur hexafloride in the transformer oil are experimented under non-uniform A.C. electric field. The result has shown that the corona frequency and corona charge quantity in liquid dielectrics were varied with gas condition in the oil and affected by the additives. SF$_{6}$ that has the effects of pressure and electrical negative characteristic is the most effective. The corona is considered to be the breakdown of bubble produced by gas contained in the oil or by dissociated ion of the oil molecules.s.

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프라이버시 보호를 위한 키 복구 시스템 모델에 대한 연구 (A Study on Key Recovery System model for Privacy)

  • 국상진;임양규;원동호
    • 한국정보처리학회:학술대회논문집
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    • 한국정보처리학회 2001년도 추계학술발표논문집 (하)
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    • pp.907-910
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    • 2001
  • 사생활 침해라는 문제와 법 집행 능력의 보장이라는 문제점 사이에서 논쟁 중인 키 복구 기술은 다양한 관점에서 연구되고 있다. 본 논문에서는 여러 가지 방식의 키 복구 시스템에 대하여 고찰함과 동시에 키 캡슐화 방식을 사용하는 키 복구 시스템 모델은 제안한다. 또한 이 모델은 사생활 침해 문제에 좀더 효과적으로 대처하도록 이루어진 키 복구 시스템 모델이다.

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Polyethylene terephthalate 중의 가동이온의 계면특성과 이동도에 관한 연구 (A study on the characteristics of interlace and Mobility of Movable Ion in polyethylene Terephthalate)

  • 이호섭;오금곤;국상훈
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1988년도 추계학술대회 논문집 학회본부
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    • pp.233-235
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    • 1988
  • This study investigate that the behavior of movable ion in PET effect on the characteristics of the insulting materials. This examine that movable ion signal to. participation of $Ca^2\;Sb^3$ resulting catalyst refuse and characteristics of activation energy that is need to reionization of movable ion type and neutralized case as measuring characteristics of polarity reversal current or thermally stimulated current.

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쌍국자 분극에 대한 열자격 특성 (Characteristics of Thermally Stimulated Measurement in Dipolar Depolarization)

  • 권영수;강도열;국상훈
    • 대한전기학회논문지
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    • 제39권4호
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    • pp.357-363
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    • 1990
  • A thermally stimulated current measurement using a temperature gradient (TG-TSC) has been applied to the study of dipolar depolarization in polymers. It has been clarified that theoretical analysis of TG-TSC in the initial rise region corresponds with the experimental results. We conclude that the experimental results on a cross-linked polyethy-lene (XLPE) film can be explained using the above relation and that the charasteristics obtained from the above theoretical analysis can be used for ascertaining the presence of a constant temperature gradient in a film.

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LB 초박막 MIM 구조에서의 전자이동 (Electron Behavior in MIM Structures of LB Ul Ira-thin Films)

  • 권영수;강도열;국상훈
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1993년도 추계학술대회 논문집
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    • pp.105-108
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    • 1993
  • Behavior of electron in polyimide LB films of Al/polyimide LB films/Au (MIM) structures is reported in the present paper. From experimental results, it is known that there is a process where electron moves from Au electrode to Al electrode through LB film. And the electrons are presumed to move by diffusion since the direction is opposite to electric field.

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온도구배 열자격 측정에 의한 Trap Carriar의 국성판정 (Determination of Polarity in Trap Carriar by Temperature Gradient Thermally Stimulated Measurement)

  • 권영수;강도영;국상훈
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1989년도 춘계학술대회 논문집
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    • pp.29-34
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    • 1989
  • A Thermally stimulated measurement using a temperature gradient has been applied to the study of charged particles and their polarity in polymer. Our experimental results on a cross-linked polysthylen(XLPE) film can be obtained, observing the TSC peaks of the trapped carriers in C peak determinated negative polarity that is electron.

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LB 초박막의 기전력 발생 (The Electro-Motive Force Generation in LB Insulating Films)

  • 권영수;강도열;국상훈
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1993년도 춘계학술대회 논문집
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    • pp.126-128
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    • 1993
  • It is well known that D.C voltage is generated at the element of MIM structure which is sandwiched between two electrode of Langmuir-Blodgett(LB) ultra-thin films. In this paper, the experiments are processed for the sample which is leaved at the atomosphere since it is fabricated in 1986. we measureed the same voltage as the time of fabricating in LB films.

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