• Title/Summary/Keyword: Nickel Thin Film

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Sensitivity of Electroplating Conditions on Young's Modulus of Thin Film (니켈박막의 공정조건에 따른 탄성계수 변화)

  • Kim, Sang-Hyun
    • Journal of the Korean Society for Precision Engineering
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    • v.25 no.8
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    • pp.88-95
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    • 2008
  • Young's modulus of electroplated nickel thin film is systematically investigated using the resonance method of atomic force microscope. Thin layers of nickel to be measured are electroplated onto the surface of an AFM silicon cantilever and Young's modulus of plated nickel film is investigated as a function of process conditions such as the plating temperature and applied current density. It is found that Young's modulus of plated nickel thin film is as high as that of bulk nickel at low plating temperature or low current density, but decreases with increasing plating temperature or current density. The results imply that the plating rate increases as increasing the plating temperature or current density, therefore, slow plating rate produces a dense plating material due to the sufficient time fur nickel ions to form a dense coating.

Durability Improvement of Metal Convex Printing Plate for Securities Printing (유가증권 인쇄용 금속 볼록판의 내구성 향상에 관한 연구)

  • Lee, Hyok-Won;Kang, Young-Reep;Kim, Byong-Hyun
    • Journal of the Korean Graphic Arts Communication Society
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    • v.29 no.3
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    • pp.133-142
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    • 2011
  • We produce a photosensitive convex plate to research a Nickel metal relief printing plate using galvanic process. A Method for preparing DLC convex plate that is metalized on Nickel metal relief printing plate using CVD(Chemical Vapor Deposition) process and $N_2DLC$-convex plate that is DLC metalized thin film layer of $N_2$ plasma surface treatment are comprised. DLC thin film layers on Nickel surface are fragile. The results of the research indicate that the coefficient of friction on DLC metalized thin film layer is relatively low than Nickel surface and the durability of Nickel surface coated DLC metalized thin film layer is superior to Nickel surface. A relative evaluation of three form plate wetting properties using varnish liquid-drop plate indicates superior printing aptitudes for $N_2DLC$, DLC, Nichel plate order as above.

Growth of Electrochemical Nickel Thin Film on ITO(Indium Tin Oxide) Electrode (ITO(Indium Tin Oxide) 전극상의 전기화학적 Nickel 박막형성)

  • Kim, Woo-Seong;Seong, Jeong-Sub
    • Journal of Korean Ophthalmic Optics Society
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    • v.7 no.2
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    • pp.155-161
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    • 2002
  • We studied the formation of nickel nano thin film that have various electrochromic properties. Nickel thin film having various thickness will apply photoelectronic devices, specially, electrochromic devices. These devices will apply lens, battery, glass and solar cell that have light, thin, simple and small that applied nanotechnology and quantum dot. Nickel thin film was coated by electrochemical method on ITO electrode. We studied the thin film properties by Cyclic voltammetry, Chronoamperometry. Impedance. X-ray diffraction analysis and Atomic force microscopy.

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Measurement of Mechanical Properties of Electroplated Nickel Thin Film for MEMS Application (미소 기전 시스템용 니켈 박막의 기계적 물성 측정)

  • Baek, Dong-Cheon;Park, Tae-Sang;Lee, Soon-Bok;Lee, Nag-Kyu;Choi, Tae-Hoon;Na, Kyoung-Hoan
    • Proceedings of the KSME Conference
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    • 2003.04a
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    • pp.1321-1325
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    • 2003
  • Nickel thin film is one of the most important materials used in micromachined structure. To measure the mechanical properties of electroplated nickel thin film, two techniques are adopted and compared quantitatively with. One is nano-indentation test to measure the elastic modulus. The other is tensile test to measure not only elastic modulus but also yield strength and plastic deformation, ultimate strength. To perform the tensile test, the test apparatus was constructed with linear guided servo motor for actuation, load cell for force measurement and dual microscope for strain measurement.

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Fabrication of Lithium Nickel Cobaltate Thin-film for the Cathode Material of Microbattery

  • Kim, Duksu;Kim, Mun-Kyu;Son, Jong-Tae;Kim, Ho-Gi
    • Journal of the Korean Ceramic Society
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    • v.38 no.8
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    • pp.683-686
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    • 2001
  • Electrochemically active lithium nickel cobalt oxide thin-film was not fabricated until now. The thin-film was deposited by RF magnetron sputtering at room temperature, and its initial phase was amorphous. By varying deposition condition, the different characteristics of thin-film were achieved. Using electrochemical analyses, the relationship between physical and electrochemical characteristics was identified. Crystallized thin-film by RTA (Rapid Thermal Annealing) was shown a good capacity and cycle property.

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Absorptance and Electrical Properties Evaluation of Nickel Layer Deposited onto Thin Film Pyroelectric PZT IR Detector (PZT박막 적외선 감지소자의 적외선 흡수층으로 증착된 니켈 박막의 광학 및 전기적 특성 분석)

  • Ko, Jong-Soo
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.28 no.11
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    • pp.1727-1732
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    • 2004
  • A nickel layer was deposited onto the PZT thin films, serving both as a selective radiation absorption layer and as a top electrode. The absorption properties of such nickel coated multi-layered infrared detectors were studied in the visible and infrared wavelength ranges. The optimal thickness of the nickel layer on our substrate was 10nm. The maximum absorption coefficient of the deposited 10nm thick nickel layer was 0.7 at a 632nm wavelength. However, a striking asymmetric polarization hysteresis loop was observed in these PZT thin films with nickel as the top electrode. This asymmetric polarization was attributed to the difference between the dynamic pyroelectric responses in these Ni/PZT/Pt films poled either positively or negatively before the measurement. A positively poled film showed a 40% higher voltage response than a negatively poled detector.

Measurement of Yield Strength for Electroplated Nickel Film Using Micro-cantilever

  • Moon, Hyoung-Sik;Kim, Jooh-Wan;Kim, Young-Min
    • KIEE International Transactions on Electrophysics and Applications
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    • v.4C no.5
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    • pp.247-251
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    • 2004
  • We report highly improved yield strength of nickel thin film, prepared using electroplating. The micro-scaled nickel cantilever is found to have significantly higher yield strength than bulk nickel. For the yield strength test, the heights of the micro-scaled cantilever were varied up to 60 ${\mu}{\textrm}{m}$ and electrostatic force was used for actuation. Stress of the bent cantilever was estimated using the FEM large deflection model. The yield strength of the thin nickel film is found to be over five times higher than that of the bulk nickel previously published. Results from this study indicate that metal microstructures can be used for MEMS applications requiring large deflection.

A Composite of Metal and Polymer Films: Thin Nickel Film Coated on a Polypropylene Film after Atmospheric Plasma Induced Surface Modification

  • Song, Ho-Shik;Choi, Jin-Moon;Kim, Tae-Wan
    • Transactions on Electrical and Electronic Materials
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    • v.12 no.3
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    • pp.110-114
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    • 2011
  • Polymeric films of high chemical stability and mechanical strength covered with a thin metallic film have been extensively used in various fields as electric and electronic materials. In this study, we have chosen polypropylene (PP) as the polymer due to its outstanding chemical resistance and good creep resistance. We coated thin nickel film on PP films by the electroless plating process. The surfaces of PP films were pre-treated and modified to increase the adhesion strength of metal layer on PP films, prior to the plating process, by an environment-friendly process with atmospheric plasma generated using dielectric barrier discharges in air. The surface morphologies of the PP films were observed before and after the surface modification process using a scanning electron microscope (SEM). The static contact angles were measured with deionized water droplets. The cross-sectional images of the PP films coated with thin metal film were taken with SEM to see the combined state between metallic and PP films. The adhesion strength of the metallic thin films on the PP films was confirmed by the thermal shock test and the cross-cutting and peel test. In conclusion, we made a composite material of metallic and polymeric films of high adhesion strength.

Fabrication of Nickel Oxide Thin Film for Lithium Based Electrolyte by Sol-Gel Method and Electrochromic Properties in Lithium Based Electrolyte (Sol-Gel법을 통한 리튬 기반 전해질에 적합한 니켈 산화물 박막의 제조와 리튬 기반 전해질에서의 전기변색 특성)

  • Park, Sun-Ha;Yoo, Sung-Jong;Lim, Ju-Wan;Yun, Sung-Uk;Cha, In-Young;Sung, Yung-Eun
    • Journal of the Korean Electrochemical Society
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    • v.12 no.3
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    • pp.251-257
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    • 2009
  • In this study, we fabricated nickel oxide thin film for lithium based electrolyte using sol-gel method. This film was deposited by dip-coating method with mixed solvent of DameH (N,N-dimethylaminoethanol) and DI water. As changing the ratio between DmaeH and DI water, nickel oxide thin film was presented in different charge density and optical transmittance because they were shown various thickness. It was accounted for changing viscosity and density by the ratio of DmaeH and DI water. The thin film synthesized with 1 : 1 ratio of DmaeH and DI water was expressed best electrochromic performance in lithium based electrolyte, because of thick thickness but porous structures.

Enhanced Electrochromic Switching Performance in Nickel Hydroxide Thin Film by Ultra-Thin Ni Metal (니켈금속 박막에서 수산화 니켈 박막의 전기변색속도 개선)

  • Kim, Woo-Seong;Seong, Jeong-Sub
    • Journal of Korean Ophthalmic Optics Society
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    • v.7 no.2
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    • pp.163-167
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    • 2002
  • Improved optical switching property of electrochromic nickel hydroxide/nickel glass thin film is reported. Nickel metal film was deposited on glass by e-beam evaporation before following electrochemical redox cycling to form nickel hydroxide for electrochromic activation. Without ITO (indium tin oxide) layer as electrical conductor, this electrode showed more rapid coloration rate than nickel hydroxide film on ITO substrate in the change of the electric voltage and optical transmittance. XPS analysis confirmed the existence of ultra-thin nickel metal layer (${\sim}10{\AA}$) between electrochemically grown nickel hydroxide and the glass substrate. It is concluded that the remained nickel metal nano-layer attribute to the conduction layer and the enhanced response time.

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