• Title/Summary/Keyword: Korean film

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Microstructure and Morphology of Titanium Thin Films Deposited by Using Shadow Effect (그림자효과를 이용하여 증착한 타이타늄 박막의 미세구조 및 형상)

  • Han, Chang-Suk;Jin, Sung-Yooun;Kwon, Hyuk-Ku
    • Korean Journal of Materials Research
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    • v.29 no.11
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    • pp.709-714
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    • 2019
  • In order to observe the microstructure and morphology of porous titanium -oxide thin film, deposition is performed under a higher Ar gas pressure than is used in the general titanium thin film production method. Black titanium thin film is deposited on stainless steel wire and Cu thin plate at a pressure of about 12 Pa, but lustrous thin film is deposited at lower pressure. The black titanium thin film has a larger apparent thickness than that of the glossy thin film. As a result of scanning electron microscope observation, it is seen that the black thin film has an extremely porous structure and consists of a separated column with periodic step differences on the sides. In this configuration, due to the shadowing effect, the nuclei formed on the substrate periodically grow to form a step. The surface area of the black thin film on the Cu thin plate changes with the bias potential. It has been found that the bias of the small negative is effective in increasing the surface area of the black titanium thin film. These results suggest that porous titanium-oxide thin film can be fabricated by applying the appropriate oxidation process to black titanium thin film composed of separated columns.

Qualitative Analysis of Film Thickness in Elastohydrodynamic Lubrication (탄성 유체 윤활에서의 유막 두께 측정에 관한 정성적 분석)

  • 최언진;장시열
    • Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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    • 1999.06a
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    • pp.147-155
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    • 1999
  • The film thickness and shape of elastohydrodynamic lubrication is measured by optical interferometer, which is the most precise method for EHL film measurement. However the interpretation of the image pattern from optical viscometer is not easy for two-dimensional shape. A newly developed method of image processing makes it possible to evaluate the film thickness and shape in every point of contact region with two dimensional aspects. In this study, we captured film shape of EHL film from the monochromatic incident light with the Image processing method, which uses phase shift method, and obtained the image analysis method for gray level image in order to qualitatively evaluate film shapes.

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A Study on the Measurement of Oil-Film Pressure in Engine Connecting Rod Bearing and Piston Pin-Boss by Thin-Film Sensor

  • Mihara, Yuji;Someya, Tsuneo
    • Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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    • 2002.10b
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    • pp.409-410
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    • 2002
  • In order to measure the oil-film pressure in sliding surface of machinery, we have developed a piezo-resistive type thin-film pressure sensor. To reduce the measurement error due to temperature and strain, the constituent of the pressure sensitive alloy was optimized and a new sensor shape was devised. In this study, we present the measurement results of the oil-film pressure distribution in engine connecting rod big-end bearing and piston pin- bosses with 3 different pin-boss shapes using the newly developed thin-film pressure sensor.

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An experimental study on mechanism for the disintegration of liquid film surface waves by a parallel air flow (평행공기류에 의한 액막류 표면파의 분열기구에 관한 실험적 연구)

  • 이규영;양옥용
    • Journal of the korean Society of Automotive Engineers
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    • v.14 no.6
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    • pp.81-90
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    • 1992
  • This paper deals with an experimental study on the initial condition of liquid film surface waves disintegration and investigation on the behavior of liquid film surface waves formed by the high speed air flow on the solid plane surface. The authors conducted the qualitative and quantitative study to in vestigate the liquid film flow phenomena, the liquid film disintegration mechanism, and droplet formation process with breaking the liquid film surface wave. The newly devised transparent rectangular test section which has semi-two-dimensional flow at the center of the bottom was introduced to perform the experimental study, and it can generate the uniform thickness liquid film at the bottom. The strobo streak camera was used to obtain the instantaneously transformed photographs. The electronic measuring device was also used to measure the liquid film thickness variation in order to perform the easy and effective analysis of complex flow phenomena in the air-water cocurrent flow.

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A study on the crystallographic properties of ZnO thin films for FBAR (FBAR용 ZnO 박막의 결정학적 특성에 관한 연구)

  • Keum, M.J.;Park, W.H.;Yoon, Y.S.;Choe, Hyeong-Uk;Shin, Y.H.;Choe, Dong-Jin;Kim, K.H.
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2002.07b
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    • pp.703-706
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    • 2002
  • Piezoelectric thin film such as ZnO and AlN can be applicable to FBAR (Film Bulk Acoustic Resonator) device of thin film type and FBAR can be applicable to MMIC. The characteristic of FBAR device is variable according to the deposition conditions of piezoelectric thin film when preparation of thin film by sputtering method. In this study, we prepared ZnO thin film for FBAR using Facing Targets Sputtering apparatus which can be deposited fine Quality thin film because temperature increase of substrate due to the bombardment of high-energy particles can be restrained. And crystalline and c-axis preferred orientation of ZnO thin film with deposition conditions was investigated by XRD.

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Properties Electric of AIN Thin Film on the Si and GaAs Substrate (Si와 GaAs기판 위에 AIN 박막의 전기적 특성)

  • Park, Jung-Cheul;Chu, Soon-Nam;Kwon, Jung-Youl;Lee, Heon-Yong
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.21 no.1
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    • pp.5-11
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    • 2008
  • To study the effects of $H_2$ gas on AIN insulation thin film, we prepared AIN thin film on Si and GaAs substrate by means of reactive sputtering method using $H_2$ gas as an additives, With treatment conditions of $H_2$ gas AIN thin film shows variable electrical properties such as its crystallization and hysterisis affected to electrical property, As a results, AIN thin film fabricated on Si substrate post-treated with $H_2$ gas for 20 minutes shows much better an insulation property than that of pre-treated, And AIN film treated with $H_2$ gas comparing to non-treated AIN film shows a flat band voltage decreasment. But In GaAs substrate $H_2$ gas does not effect on the flat band voltage.

Synthesis and Properties of CuNx Thin Film for Cu/Ceramics Bonding

  • Chwa, Sang-Ok;Kim, Keun-Soo;Kim, Kwang-Ho
    • The Korean Journal of Ceramics
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    • v.4 no.3
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    • pp.222-226
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    • 1998
  • $Cu_3N$ film deposited on silicon oxide substrate by r.f. reactive sputtering technique. Synthesis and properties of copper nitride film were investigated for its possible application to Cu metallization as adhesive interlayer between copper and $SiO_2. Cu_3N$ film was synthesized at the substrate temperature ranging from $100^{\circ}C$ to $200^{\circ}C$ and at nitrogen gas ratio above $X_{N2}=0.4. Cu_3N, CuN_x$, and FGM-structured $Cu/CuN_x$ films prepared in this work passed Scotch-tape test and showed improved adhesion property to silicon oxide substrate compared with Cu film. Electrical resistivity of copper nitride film had a dependency on its lattice constant and was ranged from 10-7 to 10-1 $\Omega$cm. Copper nitride film was, however, unstable when it was annealed at the temperature above $400^{\circ}C$.

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Transformation of Genre Convention in Cinematic Content Regarding Narrative and Characters of Stone (영상콘텐츠의 장르적 관습과 변형 -<스톤>의 내러티브와 캐릭터를 중심으로)

  • Kim, Yiseok
    • Journal of Korea Multimedia Society
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    • v.18 no.3
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    • pp.419-428
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    • 2015
  • Stone is a hybrid genre movie in which two different film genres coexist; one is a gangster movie, the other Baduk movie. This film deals with a relationship between an old gangster boss and a young Baduk player. The coexistence of two different worlds becomes a reason for a unique ambiance of this film, because Stone is dynamic and brutal as much as static and meditative. Firstly, this article aims to analyze the narrative structure and characters of this film comparing with conventions of gangster movie genre, especially 'jopok film' of Korean cinema. Secondly, we examine characters of this film and their relationship. Since the economic crisis under the IMF structure, a great part of korean gangster movie has represented the weakness of the fatherhood and the disorganization of family. However, in Stone, the friendship between two heroes, Namhae and Minsu, turns to a father-son relationship. In this way, Stone transformed conventions of film genre.

Effect of Bath Conditions and Current Density on Stress and Magnetic Properties of Ni-Fe Nano Thin Films Synthesized by Electrodeposition Methods (전기도금법으로 제조한 Ni-Fe 나노박막의 스트레스와 자기적 특성에 미치는 용액의 조건 및 전류밀도의 영향)

  • Koo, Bon-Keup
    • Journal of the Korean institute of surface engineering
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    • v.44 no.4
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    • pp.137-143
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    • 2011
  • The internal stress and magnetic properties (coercivity and squareness) of Ni-Fe nano thin film synthesized by electrodeposition method were studied as a function of acidic chloride bath conditions (composition and temperature) and current density. Fe deposition patterns were different depending on the temperature of the solution, the stress of film decreased with increasing the solution temperature, and the depending on the amount of Fe deposition showed a parabolic shape. The grain size of film was inversely proportional to stress of thin film. The internal stress of thin film and magnetic properties were deeply relevant, and the stress of thin film had a relationship with bath conditions and grain size of the thin film surface.

Commercialization & Process Optimization of Protective Film on Nano Silver Transparent Conductive Substrate by Means of Large Scale Roll-to-Roll Coating and Experimental Design (나노실버 투명전도소재 보호필름의 개발 및 공정 최적화와 실험 계획법을 이용한 검증)

  • Park, Kwang-Min;Lee, Ji-Hoon
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.28 no.12
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    • pp.813-820
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    • 2015
  • We have studied commercialization and process optimization of protective film on transparent conductive coated substrate, nano silver on flexible PET (poly ethylene terephthalate), by means of roll-to-roll micro-gravure coater. Nanosilver on flexible PET substrate is potential materials to replace ITO (indium tin oxide). Protective film is most important to maintain unique silver pattern on top of transparent PET. PSA pressure sensitive adhesives) was developed solely for nano silver on PET and protective film was successfully laminated. We have optimized all process conditions such as coating thickness, line speed and aging time & temperature via experimental design. Transparent conductive film and its protective film developed in this research are commercially available at this moment.