• Title/Summary/Keyword: Electric probe

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Dry Etch Process Development for TFT-LCD Fabrication Using an Atmospheric Dielectric Barrier Discharge

  • Choi, Shin-Il;Kim, Sang-Gab;Choi, Seung-Ha;Kim, Shi-Yul;Kim, Sang-Soo;Lee, Seung-Hun;Kwon, Ho-Cheol;Kim, Gon-Ho
    • 한국정보디스플레이학회:학술대회논문집
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    • 2008.10a
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    • pp.1272-1275
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    • 2008
  • We present the development of dry etch process for the liquid crystal display (LCD) fabrication using a dielectric barrier discharge (DBD) system at atmospheric pressure. In this experimental work, the dry etch characteristics and the electrical properties of thin film transistor are evaluated by using the scanning electron microscopy and electric probe, and TFT-LCD panel ($300\;mm\;{\times}\;400\;mm$) is manufactured with the application of the amorphous silicon etch step in the 4 mask and 5 mask processes.

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Time-Resolved Infrared Spectroscopy of Molecular Reorientation During FLC Electro-Optic Switching

  • Jang, Won-Gun;Clark, Noel A.
    • 한국정보디스플레이학회:학술대회논문집
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    • 2003.07a
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    • pp.1112-1117
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    • 2003
  • Polarized Fourier transform infrared (IR) absorption is used to probe molecular conformation in a ferroelectric liquid crystal (FLC) during the reorientation induced by the external field. Spectra of planar aligned cells of FLC W314 are measured as functions of IR polarizer orientation and electric field applied to the FLC. The time evolution of the dichroism of the absorbance due to biphenyl core and alkyl tail molecular vibration modes, is observed. Static IR dichroism experiments show a W314 dichroism structure in which the principal axis of dielectric tensor from molecular core vibration are tilted further from the smectic layer normal than those of the tail. This structure indicates the effective binding site in which the molecules are confined in the Sm-C phase has, on average, "zig-zag" shape and this zig-zag binding site structure is rigidly maintained while the molecular axis rotates about the layer normal during field-induced switching.

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A Study on Fabrication of $Bi_{2}Sr_{2}Ca_{2}Cu_{3}O_{x}$ Superconductor Thick Films on Cu Substrates (동피복 Bi2223 초전도후막 합성에 관한 연구)

  • 한상철;성태현;한영희;이준성;안재원
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2002.07a
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    • pp.478-481
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    • 2002
  • We carried out the experiments for fabricating $Bi_{2}Sr_{2}Ca_{2}Cu_{3}O_{x}$(Bi2223) superconductor thick films on Cu tapes. Cu-free (Bi,Pb)-Sr-Ca-0 powder mixtures were screen- printed on Cu tapes and heat-treated at 840-$860^{\circ}C$ for several minutes in air. Surface microstructures and phases of films were analyzed by XRD and optical microscope. The electric properties of superconducting films were examined by the four probe method. At heat-treatment temperature, the printing layers were in a partially molten state by liquid reaction between CuO in the oxidized copper tape and the precursors which were printed on Cu tapes. During the heat-treatment procedure, it is thought that Bi2223 superconducting particles nucleate at interfaces between Bi2212 phase and liquid.

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A Study on Evaluation of an Automatic Tool Compensation System in CNC Machine Tool (CNC 공작기계에서의 자동공구 보정시스템의 평가에 관한 연구)

  • 정상화;신현성;김현욱
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2001.04a
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    • pp.371-375
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    • 2001
  • The tool wear that is developed by long-term machining in mold manufacturing with machining center makes a severe influence to the accuracy and the surface roughness. In this reason, tool-wear supervising system which has guaranteed high accuracy and high speed is needed to improve the measurement quality. Touching probe and touch sensor are widely used to measure the tool profile at on-machine measurement. In this paper, using the newly developed electric touch point measuring system, the Automatic Tool Compensation System is developed to correct the error of tool diameter resulted from the wear, and the operating method of this system is also provided.

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Development of an Automatic Tool Compensation System for M/C (머시닝센터용 자동공구보정시스템의 개발)

  • 정상화;신현성;김현욱
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.10 no.4
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    • pp.48-54
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    • 2001
  • The tool wear that is developed by long-term machining in mold manufacturing with machining center makes a severe influence to the accuracy and the surface roughness. in this reason, tool-wear supervising system which has guaranteed high accuracy and high speed is needed to improve the measurement quality. Touching probe and touch sensor are widely used to measure the tool profile at on-machine measurement. In this paper, using the newly developed electric touch point measuring system, the Automatic Tool Compensation System is developed to correct the error of tool diameter resulted from the wear, and the operating method of this system is also provided.

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A study on the automatic compensation of machining error in NC turning (NC 선반가공에 있어서 가공오차의 자동 보정에 관한 연구)

  • 박천경;박동삼
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.14 no.6
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    • pp.1542-1551
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    • 1990
  • This paper shown how to measure the machining error in diameter of cylindrical workpiece and compensate the measured machining error in NC turning. Machining error is measured by the electric micrometer mounted on the tool post with the NC part program for probe location path analyzed. Correct NC part program for finish turning is automatically generated to compensate the measured machining error. These concepts have been effectively introduced to a newly developed software for error compensation. In turning experiments with the developed error compensation system, machining error was almost within the specified tolerance, which reveals the effectiveness of the developed system.

The Fabrication of Low Cost High Temperature Superconducting Tape (저비용 고온초전도 선재 제조 연구)

  • 한상철;성태현;한영희;이준성;이영우;정년호;김상준
    • Proceedings of the Korea Institute of Applied Superconductivity and Cryogenics Conference
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    • 2000.02a
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    • pp.85-88
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    • 2000
  • Cu-free Bi-Sr-Ca-O powder mixtures were screen-printed on Cu tapes and heat-treated at 850-$870^{\circ}C$ for several minutes in air, oxygen, nitrogen and low oxygen pressure. Cu-free precursors were composed of Bi_{x}$SrCaO_{y}$ (x=1.2-2). In order to obtain the optimum heat-treatment condition, we studied on an effect of the precursor composition, the printing thickness and the heat-treatment atmosphere on the superconducting properties of Bi2212 films and the reaction mechanism of their rapid formation. Microstructures and phases of thick films were analyzed by optical microscope and XRD. The electric properties of superconducting films were examined by the four probe method. At heat-treatment temperature, the thick films were in a partially molten state by liquid reaction between CuO in the oxidized copper tape and the precursors which were printed on Cu tapes.

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Study of Electrophoretic Karyotypes of Fusarium Section Liseola (Fusarium 균의 section Liseola에 대한 핵형 연구)

  • 밍병례;안미선;최영길
    • Korean Journal of Microbiology
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    • v.35 no.3
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    • pp.192-196
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    • 1999
  • CHEF-PFGE(Contour-Clarnped Homogeneous Electric field- Pulsed Field Gel Electrophoresis) was used to identify electrophoretic karyotype for eight strains belonging to the Fzisoriuni section Liseolo. Chromosome numbers were nine to thirteen bands, ranging in size Cram 0.75 to 6.45 Mb. The total genome size was eslimated to range from 38.19 Mb to 43.12 Mb and numerous chromosome-length polymorphisms (CLPs) were observed. For the chromosome localizalion of the gene, 1GS sequence(2.6 Kb) of rDNA from F: moniliforme, chs-2 gene(2.8 Kb) and 4 - 3 gene(3.8 Kb) from Neuuospora cmssa were wed as probes.

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Preparation AZO(ZnO:Al) thin film for FBAR by FTS method (대향타겟스퍼터링법에 의한 FBAR용 AZO(ZnO:Al) 전극의 제작)

  • Keum, M.J.;Shin, S.K.;Ga, C.H.;Chu, S.N.;Kim, K.H.
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2003.07a
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    • pp.172-175
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    • 2003
  • ZnO:Al thin film for application to FBAR's bottom electrode using ZnO piezoelectric thin film were prepared by FTS, in order to improve the crystallographic properties of ZnO thin films because the ZnO:Al thin film and ZnO thin films structure is equal each other. So we prepared the ZnO:Al thin film with oxygen gas flow rate. Thickness and c-axis preferred orientation and electric properties of ZnO:Al bottom electrode were evaluated by $\alpha$-step, XRD and 4-point probe..

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The collecting of 3dimensional data from the way of pulse generating at the M/C (펄스지령법에 의한 머시닝센터상의 3차원 형상정보 수집)

  • 강효석;임한석;김선호;안중환
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1995.04b
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    • pp.396-399
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    • 1995
  • In this study, Acquisition system is proposed to acquire 3 dimensional data of the free surface model using direct pulse control to machining center. Todo this, I/F to connect between manual operating handle and computer is made, and 3 dimensional shape measuring algorithm using Z-map is applied. The 3 dimensional shape data of the free surface model measured by laser displacement sensor and electric touch probe are achieved directly. Performance of the proposed system is evaluated through measurement of various shape model.

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