• 제목/요약/키워드: Air-dielectric

검색결과 429건 처리시간 0.024초

동축선로 프로브를 이용한 프린트 배선 회로용 기판 재료의 주파수 및 온도 변화에 따른 유전특성 연구 (A Study on Dielectric Properties of Printed Circuit Board(PCB) Materials with Variation of Frequency and Temperature using Coaxial Air Line Probe)

  • 박종성;김종헌
    • 한국전기전자재료학회:학술대회논문집
    • /
    • 한국전기전자재료학회 1998년도 추계학술대회 논문집
    • /
    • pp.187-190
    • /
    • 1998
  • In this paper a probe for the' measurement of dielectric properties of dielectric sheet materials is designed and implemented as a coaxial air line type. Using the broadband impedance method with this measurement probe the dielectric constant and loss tangent of the glass-epoxy and teflon are determined in the frequency range of 0.1 - l.O[GHz] with the temperature variation from $25[^{\circ}C]$ up to $65[^{\circ}C]$. A measured relative dielectric constant of the glass-epoxy is 4.42 and a loss tangents is 0.019 relatively, and the relative dielectric constants of teflon is 2.17 and a loss tangents is 0.002 relatively

  • PDF

Study of Via-Typed Air-Gap for Logic Devices Applications below 45 nm Node

  • Kim, Sang-Yong;Kim, Il-Soo;Jeong, Woo-Yang
    • Transactions on Electrical and Electronic Materials
    • /
    • 제12권4호
    • /
    • pp.131-134
    • /
    • 2011
  • Back-end-of-line using ultra low-k (ULK; k < 2.5) has been required to reduce resistive capacitance beyond 45 nmtechnologies, because micro-processing units need higher speed and density. There are two strategies to manufacture ULK inter-layer dielectric (ILD) materials using an air-gap (k = 1). The former ULK and calcinations of ILD degrade the mechanical strength and induce a high cost due to the complication of following process, such as chemical mechanical polishing and deposition of the barrier metal. In contrast, the air-gap based low-k ILD with a relatively higher density has been researched on the trench-type with activity, but it has limited application to high density devices due to its high air-gap into the next metal layer. The height of air-gap into the next metal layer was reduced by changing to the via-typed air-gap, up to about 50% compared to that of the trench-typed air-gap. The controllable ULK was easily fabricated using the via-typed air-gap. It is thought that the via-type air-gap made the better design margin like via-patterning in the area with the dense and narrow lines.

평등/불평등 전계하의 제조공기(I-Air)에 대한 압력별 절연파괴강도 특성 (Dielectric Strength for Imitation Air with Pressure Variation under Uniform and Non-Uniform Fields)

  • 이창욱;이창훈;최은혁;이상호;이광식
    • 한국조명전기설비학회:학술대회논문집
    • /
    • 한국조명전기설비학회 2007년도 추계학술대회 논문집
    • /
    • pp.263-266
    • /
    • 2007
  • In this paper approves (AC and DC) high voltage by experimental GIS(Gas Insulated Switchgear) chamber and (AC and DC) power source to study breakdown characteristics by pressure(P) change and change of electrode distance(d) at (AC and DC) high voltage of Imitation I-Air, $N_2$ : $O_2$ = 79(%) : 21[%]) to alternate $SF_6$ and achieved research. Gave P change of I-Air to study I-Air's Dielectric Strength using uniform and non-uniform fields(sphere-sphere and Needle-Plane electrode) and studied relations dielectric strength($V_D$) by each P different d.

  • PDF

Air stable n-type organic field effect transistors using a perfluoropolymer insulator

  • Jang, Jun-Hyuk;Kim, Ji-Whan;Park, Noh-Hwal;Kim, Jang-Joo
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 한국정보디스플레이학회 2008년도 International Meeting on Information Display
    • /
    • pp.276-279
    • /
    • 2008
  • Air stable n-type organic field effect transistors (OFETs) based on CB60B are realized using a perfluoropolymer as the gate dielectric layer. The devices showed the field-effect mobility of $0.05\;cm^2P/V\;s$ in ambient air. Replacing the gate dielectric material by $SiO_2$ resulted in no transistor action in ambient air. Perfluorinated gate dielectric layer reduces interface traps significantly for the n-type semiconductor even in ambient air.

  • PDF

전기집진기형 공기청정기의 미세 먼지 저감 특성에 관한 연구 (Characteristics of the Reduction of Fine Particles in an Indoor Air Cleaner Using Electrostatic Precipitation Technique)

  • 목영선;이호원
    • 한국산업융합학회 논문집
    • /
    • 제7권1호
    • /
    • pp.115-120
    • /
    • 2004
  • An indoor air cleaner consisting of a dielectric barrier discharge system and an electrostatic precipitator (ESP) was experimentally investigated. The function of the dielectric barrier discharge is to precharge particles by producing nonthermal plasma before indoor air enters ESP, leading to an enhancement in dust collection efficiency. The dependence of particle size distribution on the plasma discharge was examined to understand the mechanism of the particle precharging. The plasma discharge was found to increase the electrical force of the particles, rather than agglomerate them. Coarse particles in the range of 0.5 to $5.0{\mu}m$ were observed to be easily collected by this indoor air cleaner, and the present study laid emphasis on the removal of fine particles of $0.3{\mu}m$. The collection efficiency of the fine particles was largely enhanced by the plasma discharge.

  • PDF

의료분야 응용을 위한 유전상수 변화를 이용한 공기감지 장치 (Air detector using the change of dielectric constant for medical applications)

  • 김경화;심준환
    • Journal of Advanced Marine Engineering and Technology
    • /
    • 제34권6호
    • /
    • pp.864-870
    • /
    • 2010
  • 수술이나 외상 등으로 동맥이나 정맥 속으로 공기가 유입되어 사망을 초래 할 수도 있는 공기 색전증을 신속하고 효율적으로 진단하기 위해 정전용량형 센서를 이용한 공기 감지 장치를 제안하였다. Tygon 튜브에 전극을 형성하여 전기적으로 커패시터를 구성하고, 튜브 내 유전체의 유전상수가 각각 다른 점을 이용하여 정전용량의 변화를 감지함과 동시에 공기의 유무를 검출한다. 변화된 정전용량의 값을 신호처리 회로를 통하여 주파수로 변환하고, 주파수 차이에 따른 공기유입 여부를 자동으로 알려주는 LabVIEW 모니터링 시스템을 구현하였다.

전극 간격에 따른 공기의 절연파괴 특성에 관한 연구 (A Study on the Electrical Breakdown Characteristics of Air according to Electrode Gap)

  • 강종오;이온유;김준일;방승민;이홍석;이종득;강형구
    • 전기학회논문지P
    • /
    • 제63권4호
    • /
    • pp.301-306
    • /
    • 2014
  • Recently in accordance with the rapid development of the industrial society, the accidents caused by dielectric breakdown have been increasing in power grid. It is important to prevent the dielectric breakdown of a high voltage apparatus to reduce the damage from electrical hazards. To establish an electrically reliable database of insulation design criteria for high voltage apparatus, a study on dielectric characteristics test is indispensable. In this study, dielectric characteristics according to field utilization factors (${\xi}$) which are represented as the ratio of mean electric field to maximum electric field are investigated. the dielectric breakdown experiments by using several kinds of electrode systems made with stainless steel are performed by AC breakdown voltage under air-insulation. Also, the experimental results are analyzed by the Weibull distribution. As a result, it is found that the dielectric characteristics of air-insulation are determined by ${\xi}$ as well as arrangement of electrode systems. It is considered that the results of this study would be applicable to designing the air-insulated high voltage apparatuses.

362 kV GIB 내에서 건조공기의 절연파괴 특성 (Breakdown Characteristics of Dry Air under 362 kV GIB)

  • 한기선;주형준;윤진열;유홍근
    • 한국전기전자재료학회논문지
    • /
    • 제23권10호
    • /
    • pp.804-808
    • /
    • 2010
  • In this paper, we studied the dielectric breakdown voltage characteristics by the AC withstand voltage test on using green insulation dry air instead of $SF_6$ insulation gas used in the GIB (gas insulated bus) of 362 kV GIS (gas insulated switchgear). The AC withstand voltage test applied to the standard KEPCO's 362 kV GIB with dry air insulation, and the equivalence of dielectric breakdown voltage for dry air and $SF_6$ gas were examined, and the empirical formulas of dielectric breakdown voltage for dry air were calculated, and the criterion of AC withstand voltage test for dry air insulation was derived. Using the criterion, dry air can be used instead of $SF_6$ gas for 362 kV GIB in the factory acceptance test was confirmed.

공기/석영관(空氣/石英管) 복합유전체(複合誘電體)장벽층(障壁層)의 고주파(高周波) 펄스 방전(放電) 특성(特性) (Air/Quartz Dielectric Double Barrier Pulse Discharge)

  • 이응관;우정욱;정석환;이동훈;문재덕
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 1994년도 하계학술대회 논문집 C
    • /
    • pp.1556-1558
    • /
    • 1994
  • An air/quartz dielectric double barrier pulse discharge has been investigated to develop a novel si lent type ozone generator. It is found that there are very active pulsed coronas occurred in the airgap which are very useful for ozone generation. And, the corona onset voltage of the airgap of the air/quartz double barrier was enfluenced greatly by the airgap of the air/quartz dielectric double barrier, and depended greatly upon the airgap ranged of $0.0{\sim}3.0mm$ and by the quartz tube thickness ranged of $1.75{\sim}2.25mm$.

  • PDF

고체재료의 유전율 측정용 Cell의 불확도 분석과 보상 (Uncertainty Analysis and Compensation of the Cell for Permittivity Measurement of Solid Materials)

  • 김한준;유광민;강전홍;한상옥
    • 한국전기전자재료학회논문지
    • /
    • 제21권1호
    • /
    • pp.53-56
    • /
    • 2008
  • The commercial parallel plate electrodes system with guard-ring electrode have been widely used for measurement of dielectric constants of solid materials. And the specification of the electrodes system is about 1 % of measurement uncertainty. This measurement uncertainty is only estimated the error come from mechanical measurements such as the area of the electrodes and the gap between the electrodes except the error come from the air gap between the electrodes and dielectric specimen. Because it is impossible to measure the air gap. This study analyze the total measurement uncertainties of the commercial dielectric constant test cell using 3 kinds of Standard Reference Materials. As a results, the total measurement uncertainty is much bigger than 1 % and the most of the uncertainty can be reduced by compensation of the error values evaluated in this study.