• 제목/요약/키워드: electronic scale

검색결과 1,226건 처리시간 0.029초

대면적 저누설 커패시터를 위한 최적화 블레이드 코팅 기반 고분자 유전체 프린팅 (Printing of Polymer Dielectric via Optimal Blade Coating for Large-scale Low-Leakage Capacitors)

  • 서경호;배진혁
    • 센서학회지
    • /
    • 제30권1호
    • /
    • pp.51-55
    • /
    • 2021
  • We demonstrated a polymer dielectric with low leakage characteristics through an optimal blade coating method for low-cost and large-scale fabrication of metal-insulator-metal (MIM) capacitors. Cross-linked poly(4-vinylphenol) (C-PVP), which is a typically used polymer dielectric, was coated on a 10 × 10 cm indium-tin-oxide (ITO) deposited glass substrate by changing the deposition temperature (TD) and coating velocity (VC) in the blade coating. During the blade coating, the thickness of the thin c-PVP varied depending on TD and VC owing to the 'Landau-Levich (LL) regime'. The c-PVP-dielectric-based MIM capacitor fabricated in this study showed the lowest leakage current characteristics (10-6 A/㎠ at 1.2 MV/㎠, annealing at 200 ℃) and uniform electrical characteristics when TD was 30 ℃ and VC was 5 mm/s. In addition, at TD = 30 ℃, stable leakage characteristics were confirmed when a different electric field was applied. These results are expected to positively contribute to applications with next-generation electronic devices.

TCP의 다중 시간 간격에서 선택적 기울기 제어를 이용한 혼잡 제어 (The Congestion Control using Selective Slope Control under Multiple Time Scale of TCP)

  • 김광준;강기웅;임세정
    • 한국전자통신학회논문지
    • /
    • 제2권1호
    • /
    • pp.10-18
    • /
    • 2007
  • 본 논문에서는 MTS(Multiple Time Scale) 트래픽 제어 프레임워크를 TCP(Transfer Control Protocol) 기반의 신뢰할 수 있는 전송 및 윈도우 기반 혼잡제어로 확대 적용한다. 이 작업은 TCP의 대역폭 소비 반응의 적극성을 LTS 네트워크 상태의 함수 형태, 즉 RTT(Round-Trip Delay Time)가 결정한 피드백 루프의 한계를 넘어서는 정보의 형태를 조정하는 LTS(Large Time Scale) 모듈과 TCP를 연계시키는 방법으로 수행된다. 혼잡 제어 성능 평가 방식은 자기 유사성 네트워크 트래픽의 물리적 모델링으로부터 얻은 시뮬레이션 기반 하에서 결과를 나타낸다. 자기 유사 버스트 환경 하에서 RTT가 450ms일 때 소스 트래픽이 초과되지 않는 경우에 TCP-SSC(Selective Slope Control)의 성능 이득은 각각 ${\alpha}$가 1.05일 45%정도 높아지는 반면에 ${\alpha}$가 1.95일 때는 20%정도의 성능 이득을 얻을 수 있다. 그러므로 비율 기반 피드백 혼잡 제어에 TCP-MTS를 적용함으로서 TCP-SCC 처리 이득의 성능이 약 2배정도의 개선이 이루어짐을 시뮬레이션 결과로부터 알 수 있다.

  • PDF

The electronic structure of the ion-beam-mixed Pt-Cu alloys by XPS and XANES

  • Lim, K.Y.;Lee, Y.S.;Chung, Y.D.;Lee, K.M.;Jeon, Y.;Whang, C.N.
    • 한국진공학회:학술대회논문집
    • /
    • 한국진공학회 1998년도 제14회 학술발표회 논문개요집
    • /
    • pp.133-133
    • /
    • 1998
  • In the thin film alloy formation of the transition metals ion-beam-mixing technique forms a metastable structure which cannot be found in the arc-melted metal alloys. Sppecifically it is well known that the studies about the electronic structure of ion-beam-mixed alloys pprovide the useful information in understanding the metastable structures in the metal alloy. We studied the electronic change in the ion-beam-mixed ppt-Ct alloys by XppS and XANES. These analysis tools pprovide us information about the charge transfer in the valence band of intermetallic bonding. The multi-layered films were depposited on the SiO2 substrate by the sequential electron beam evapporation at a ppressure of less than 5$\times$10-7 Torr. These compprise of 4 ppairs of ppt and Cu layers where thicknesses of each layer were varied in order to change the alloy compposition. Ion-beam-mixing pprocess was carried out with 80 keV Ae+ ions with a dose of $1.5\times$ 1016 Ar+/cm2 at room tempperature. The core and valence level energy shift in these system were investigated by x-ray pphotoelectron sppectroscoppy(XppS) pphotoelectrons were excited by monochromatized Al K a(1486.6 eV) The ppass energy of the hemisppherical analyzer was 23.5 eV. Core-level binding energies were calibrated with the Fermi level edge. ppt L3-edge and Cu K-edge XANES sppectra were measured with the flourescence mode detector at the 3C1 beam line of the ppLS (ppohang light source). By using the change of White line(WL) area of the each metal sites and the core level shift we can obtain the information about the electrons pparticippating in the intermetallic bonding of the ion-beam-mixed alloys.

  • PDF

Maximum Power Point Tracking without Current Sensor for Small Scale Photovoltaic Power System

  • Kasa Nobuyuki;Iida Takahiko;Majumdar Gourab
    • 전력전자학회:학술대회논문집
    • /
    • 전력전자학회 2001년도 Proceedings ICPE 01 2001 International Conference on Power Electronics
    • /
    • pp.631-634
    • /
    • 2001
  • This paper presents a maximum power point tracking without a current sensor for a small scale photovoltaic power system. The small scale photovoltaic power systems are used in parallel, and so the cost and the reliability are strongly demanded. In the proposed inverter, the current is controlled with open loop, and then the power of photovoltaic array is calculated by the equation using the voltage of the photovoltaic array. Therefore, the system can obtain the power by detecting only the voltage of the photovoltaic array. As a result, we may obtain the performance of the MPPT with a current sensor as well as with a current sensor.

  • PDF

나노급 CMOSFET을 위한 니켈-코발트 합금을 이용한 니켈-실리사이드의 열안정성 개선 (Thermal Stability Improvement of Ni-Silicide using Ni-Co alloy for Nano-scale CMOSFET)

  • 박기영;정순연;한인식;장잉잉;종준;이세광;이가원;왕진석;이희덕
    • 한국전기전자재료학회논문지
    • /
    • 제21권1호
    • /
    • pp.18-22
    • /
    • 2008
  • In this paper, the Ni-Co alloy was used for thermal stability estimation comparison with Ni structure. The proposed Ni/Ni-Co structure exhibited wider range of rapid thermal process windows, lower sheet resistance in spite of high temperature annealing up to $700^{\circ}C$ for 30 min, more uniform interface via FE-SEM analysis, NiSi phase peak. Therefore, The proposed Ni/Ni-Co structure is highly promising for highly thermal immune Ni-silicide for nano-scale MOSFET technology.

Sampled-Data Observer-Based Decentralized Fuzzy Control for Nonlinear Large-Scale Systems

  • Koo, Geun Bum;Park, Jin Bae;Joo, Young Hoon
    • Journal of Electrical Engineering and Technology
    • /
    • 제11권3호
    • /
    • pp.724-732
    • /
    • 2016
  • In this paper, a sampled-data observer-based decentralized fuzzy control technique is proposed for a class of nonlinear large-scale systems, which can be represented to a Takagi-Sugeno fuzzy system. The premise variable is assumed to be measurable for the design of the observer-based fuzzy controller, and the closed-loop system is obtained. Based on an exact discretized model of the closed-loop system, the stability condition is derived for the closed-loop system. Also, the stability condition is converted into the linear matrix inequality (LMI) format. Finally, an example is provided to verify the effectiveness of the proposed techniques.

Region Division for Large-scale Image Retrieval

  • Rao, Yunbo;Liu, Wei
    • KSII Transactions on Internet and Information Systems (TIIS)
    • /
    • 제13권10호
    • /
    • pp.5197-5218
    • /
    • 2019
  • Large-scale retrieval algorithm is problem for visual analyses applications, along its research track. In this paper, we propose a high-efficiency region division-based image retrieve approaches, which fuse low-level local color histogram feature and texture feature. A novel image region division is proposed to roughly mimic the location distribution of image color and deal with the color histogram failing to describe spatial information. Furthermore, for optimizing our region division retrieval method, an image descriptor combining local color histogram and Gabor texture features with reduced feature dimensions are developed. Moreover, we propose an extended Canberra distance method for images similarity measure to increase the fault-tolerant ability of the whole large-scale image retrieval. Extensive experimental results on several benchmark image retrieval databases validate the superiority of the proposed approaches over many recently proposed color-histogram-based and texture-feature-based algorithms.

TFT-LCD의 전기적 특성 연구 (Analysis on the Electric Properties of TFT-LCDs)

  • 김명철
    • 한국전기전자재료학회논문지
    • /
    • 제21권4호
    • /
    • pp.368-375
    • /
    • 2008
  • In this paper, we calculated the pixel and all the inter-electrode capacitances in a unit pixel of three kinds of TFT-LCD modes in order to realize the full color image. And we analyzed the effect on applied voltage. We fixed size of sub-pixel and designed a unit pixel of three kinds of TFT-LCD modes. We calculated rigorously the pixel and all the inter-electrode capacitances by the three dimensional simulation. And we expanded one pixel into whole panel using H-SPICE. As a result, we calculated the RMS voltage and kickback voltage which most affect gray scale of the pixel and calculated the number of bit according to permissible range of minimum gray scale using V-T curve.

A study on N-dimensional quad-tree decomposition

  • Yi, Cheon-Hee;Yi, Jae-Young
    • 반도체디스플레이기술학회지
    • /
    • 제8권1호
    • /
    • pp.43-48
    • /
    • 2009
  • We have examined the problem of the number of quad-tree blocks that an n-dimensional rectangle will be decomposed into on the average. the contribution of this paper are both practical and theoretical. In this paper, we develops the overlapping multi-scale models and the region quad-tree models which is useful in computer graphics animation, image processing, pattern recognition and also for modeling three dimensional objects. These models, which represent something of a conceptual departure from other models developed for multi-scale framework were developed with the specific interest of producing smooth estimates.

  • PDF

Scale-down EEPROM을 위한 MONOS 구조의 기억특성에 관한 연굴 (A Study on the Memory Characteristics of MONOS Structure for the Scale-down EEPROM)

  • 이상배;김주열;이상은;김선주;서광열
    • 한국전기전자재료학회:학술대회논문집
    • /
    • 한국전기전자재료학회 1994년도 춘계학술대회 논문집
    • /
    • pp.127-129
    • /
    • 1994
  • For scale-down EEPROM, MONOS structures with the different thicknesses of gate insulators, are fabricated and the memory characteristics, such as swtching and retention characteristics are investigated. As a results, the devices with the top oxide of 20A thick were deteriorated in retentivity. However, 11V-programmable voltage for ΔV$\sub$FB/=4V and 10-year data retention were achieved in MONOS structure with the t7p oxide of 50 ${\AA}$ thick and nitride 45${\AA}$thick.

  • PDF