• 제목/요약/키워드: ultra-thin layer

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Characteristics of Bi-superconducting Thin Films Prepared by Co- and Layer-by-Layer Deposition

  • Yang, Sung-Ho;Park, Yong-Pil
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2000년도 제2회 학술대회 논문집 일렉트렛트 및 응용기술전문연구회
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    • pp.40-44
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    • 2000
  • $Bi_2Sr_2Ca_nCu_{n+1}O_y$($n{\geq}0$; BSCCO)thin film is fabricated via two different processes using an ion beam sputtering method i.e. co-deposition and layer-by-layer deposition. A single phase of Bi2212 can be fabricated via the co-deposition process. While it cannot be obtained by the layer-by-layer process. Ultra-low growth rate in our ion beam sputtering system brings out the difference in Bi element adsorption between the two processes and results in only 30% adsorption against total incident Bi amount by layer-by-layer deposition, in contrast to enough Bi adsorption by co-deposition.

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Comparison between Bi-superconducting Thin Films Fabricated by Co-Deposition and Layer-by-Layer Deposition

  • Yang, Sung-Ho;Park, Yong-Pil
    • 한국전기전자재료학회논문지
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    • 제13권9호
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    • pp.796-800
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    • 2000
  • Bi$_2$Sr$_2$Ca$_{n}$Cu$_{n+1}$ O$_{y}$(n$\geq$0; BSCCO) thin film is fabricated via two different processes using an ion beam sputtering method i.e. co-deposition and layer-by-layer deposition. A single phase of Bi2212 can be fabricated via the co-deposition process. While it cannot be obtained by the layer-by-layer process. Ultra-low growth rate in our ion beam sputtering system brings out the difference in Bi element adsorption between the two processes and results in only 30% adsorption against total incident Bi amount by layer-by-layer deposition, in contrast to enough Bi adsorption by co-deposition.on.n.

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Comparison between BSCCO Thin Films Fabricated by Co-Deposition and Layer-by-Layer Deposition

  • Lee, Hee-Kab;Park, Yong-Pil;Lee, Joon-Ung
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2000년도 하계학술대회 논문집
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    • pp.230-234
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    • 2000
  • Bi$_2$Sr$_2$Ca$_{n}$Cu$_{n+1}$ O$_{y}$(n$\geq$0; BSCCO)thin film is fabricated via two different processes using an ion beam sputtering method i.e. co-deposition and layer-by-layer deposition. A single phase of Bi2212 can be fabricated via the co-deposition process. While it cannot be obtained by the layer-by-layer process. Ultra-law growth rate in our ion beam sputtering system brings out the difference in Bi element adsorption between the two processes and results in only 30% adsorption against total incident Bi amount by layer-by-layer deposition, in contrast to enough Bi adsorption by co-deposition.on.n.

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구리 금속선의 산화 방지를 위한 알루미늄 박막의 산화 방지 특성 (Characteristics of the aluminum thisn films for the prevention of copper oxidation)

  • 이경일;민경익;주승기;라관구;김우식
    • 전자공학회논문지A
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    • 제31A권10호
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    • pp.108-113
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    • 1994
  • The characteristics of the oxidation prevention layers for the copper metallization were investigated. The thin films such as Cr, TiN and Al were used as the oxidation prevention layers for copper. Ultra thin aluminum films were found to prevent the oxidation of copper up to the highest oxidation annealing temperature among the barrier layers examined in this study. It was found that oxygen did not diffuse into copper through aluminum films because of the aluminum oxide layer formed on the aluminum surface and the ultra thin aluminum film could be a good oxidation barrier layer for the copper metallization.

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XRD Patterns and Bismuth Sticking Coefficient in $Bi_2Sr_2Ca_nCu_{n+1}O_y(n\geq0)$ Thin Films Fabricated by Ion Beam Sputtering Method

  • Yang, Seung-Ho;Park, Yong-Pil
    • Journal of information and communication convergence engineering
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    • 제4권4호
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    • pp.158-161
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    • 2006
  • [ $Bi_2Sr_2Ca_nCu_{n+1}O_y(n{\geq}0)$ ] thin film is fabricatedvia two different processes using an ion beam sputtering method i.e. co-deposition and layer-by-layer deposition. A single phase of Bi2212 can be fabricated via the co-deposition process. While it cannot be obtained by the layer-by-layer process. Ultra-low growth rate in our ion beam sputtering system brings out the difference in Bi element adsorption between the two processes and results in only 30% adsorption against total incident Bi amount by layer-by-layer deposition, in contrast to enough Bi adsorption by co-deposition.

하지층기판온도에 따른 CoCrTa/Si 이층박막의 특성변화 (Characteristics variation of CoCrTa/Si double layer thin film on variation of underlayer substrate temperature)

  • 박원효;김용진;금민종;가출현;손인환;최형욱;김경환
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2001년도 추계학술대회 논문집
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    • pp.77-80
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    • 2001
  • Crystallographic and magnetic characteristics of CoCr-based magnetic thin film for perpendicular magnetic recording media were influenced on preparing conditions. In these, there is that substrate temperature was parameter that increases perpendicular coercivity of CoCrTa magnetic layer using recording layer. While preparation of CoCr-based doublelayer, by optimizing substrate temperature, we expect to increase perpendicular anisotropy of CoCr magnetic layer and prepare ferromagnetic recording layer with a good quality by epitaxial growth. CoCrTa/Si doublelayer showed a good dispersion angle of c-axis orientation $\Delta$$\theta$$_{50}$ caused by inserting amorphous Si underlayer which prepared at underlayer substrate temperature 250C. Perpendicular coercivity was constant, in-plane coercivity was controlled a low value about 2000e. This result implied that Si underlayer could restrain growth of initial layer of CoCrTa thin film, which showed bad magnetic properties effectively without participating magnetization patterns of magnetic layer. In case of CoCrTa/Si that prepared with ultra thin underlayer, crystalline orientation of CoCrTa was improved rather underlayer thickness 1nm, it was expected that amorphous Si layer played a important role in not only underlayer but also seed layer.t also seed layer.r.

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비휘발성 메모리 적용을 위한 $SiO_2/ZrO_2$ 다층 유전막의 전기적 특성 (Electrical characteristic of stacked $SiO_2/ZrO_2$ for nonvolatile memory application as gate dielectric)

  • 박군호;김관수;오준석;정종완;조원주
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2008년도 하계학술대회 논문집 Vol.9
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    • pp.134-135
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    • 2008
  • Ultra-thin $SiO_2/ZrO_2$ dielectrics were deposited by atomic layer chemical vapor deposition (ALCVD) method for non-volatile memory application. Metal-oxide-semiconductor (MOS) capacitors were fabricated by stacking ultra-thin $SiO_2$ and $ZrO_2$ dielectrics. It is found that the tunneling current through the stacked dielectric at the high voltage is lager than that through the conventional silicon oxide barrier. On the other hand, the tunneling leakage current at low voltages is suppressed. Therefore, the use of ultra-thin $SiO_2/ZrO_2$ dielectrics as a tunneling barrier is promising for the future high integrated non-volatile memory.

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Langmuir-Blodgett(LB)법을 이용한 (N-docosyl pyridinium)-TCNQ(1:2) 착체의 초박막 제작 (Fabrication of Ultra Thin Films with (N-docosyl pyridinium)-TCNQ(1:2) Complex by the Langmuir-Blodgett(LB) Method)

  • 강훈;김용태;정순욱;손병청;강도열
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1988년도 추계학술대회 논문집
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    • pp.54-57
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    • 1988
  • A film is fabricated by depositing several slices ultra thin films on a slide glass. The UV-absorbance outcomed on a multi-layered bulky ultra thin film with (N-docosyl pyridinium)-TCNQ (1:2) complex results tat the quantity of UV-absorbances becomes more linearly according to the number of layer becomes higher. In addition, it is found that the capacitance of this film gets smaller as the number of layer gets higher. Finally, the conductivity of this film is measured by the direction of the long axis of the TCNQ radical anion, and is resulted in a remarkably low value (about 1.66∼3.78 x 10$\^$-14/S/cm).

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ICP-CVD 반응기 내에서 $N_2O$ 플라즈마 산화법을 이용하여 증착된 ultra thin silicon oxynitride films 에 관한 연구 (Study on the ultra thin film of silicon oxyinitride deposited by plasma - assisted $N_2O$ oxidation in ICP-CVD reactor)

  • 황성현;정성욱;이준신
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2006년도 하계학술대회 논문집 Vol.7
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    • pp.161-162
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    • 2006
  • Scaling rules for TFT application devices have led to the necessity of ultra thin dielectric films and high-k dielectric layers. In this paper, The advantages of high concentration of nitrogen in silicon oxide layer deposited by using $N_2O$ in Inductively Coupled Plasma Chemical Vapor Deposition (ICP-CVD) reported about Ellipsometric measurement, Capacitance-Voltage characterization and processing conditions.

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