• 제목/요약/키워드: Microprobe

검색결과 125건 처리시간 0.025초

마이크로 탐침의 형상최적설계 및 접촉력 계산 (Shape Optimization of Micro-probes and Its Contact Forces)

  • 장동수;김철;김광중
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2007년도 춘계학술대회A
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    • pp.608-613
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    • 2007
  • Fine pitch microprobe arrays are microneedle-like probes for inspecting the pixel of LCD panel. They are usually made of multilayers of metallic, nonmetallic, or combination of the two. In this study, the microprobe arrays were fabricated using the process applied for MEMS fabrication technology and they consist of BeCu, BeNi, or Si. Their contacting probing force and deflection were measured using the laser equipment. The design requirement are 5gf of a minimum contact force and $150{\mu}m$ of a maximum deflection. A lot of microprobe shape are possible satisfying the requirement. A double cantilever-type microprobe having needles on both ends were applied for this study. Several candidate were chosen using the topology and shape optimization technique subjected to the design requirements. Finite element results and experimental results were compared and both gave good correlation.

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백색광 및 X선 미세탐침 빔라인용 실시간 제어시스템 개발 (Development of Real-time Control System for White bBamline and Microprobe Beamline)

  • 윤종철;이진원;고인수
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1997년도 한국자동제어학술회의논문집; 한국전력공사 서울연수원; 17-18 Oct. 1997
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    • pp.748-751
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    • 1997
  • The White Beamline of the Pohang Accelerator Laboratory(PAL) consists of main and second slits, a microprobe system, two ion chambers, a video-microscope, and a Si(Li) detector. These machine components must be controlled remotely through computer system to make user experiments precise and speedy. A real-time computer control system was developed to control and monitor these machine components. A VNIEbus computer with OS-9 real-time operating system was used for low-level data acquisition and control. VME I/O modules were used for step motor control and scaler control. The software has modular structure for maximum performance and easy maintenance. We developed database, I/O driver, and control software. We used PC/Window95 for data logging and operator interface. Visual C++ was used graphical user interface programming. RS232C was used for communication between VME and PC.

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EPMA의 지질학(地質學)에의 응용(應用) (The Application of Electron Microprobe Analysis in Geological Science)

  • 상기남
    • 자원환경지질
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    • 제17권4호
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    • pp.315-320
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    • 1984
  • The newly discovered minerals found during 30 years have been discovered with election microprobe analysis, and several other new minerals have been described largely on the basis of probe analysis. Widely used types of instrument are the wavelength dispersive spectrometer (WDS) and the energy dispersive Spectrometer (EDS), with emitted X-ray dispersed by a curved crystal that is arranged to satisfy the Bragg equation ($n{\lambda}=2dsin{\theta}$). Atomic Nos of Z 4 to 92 can be analyzed quantitatively if they present in amount exceeding 50~100ppm. The application of the microprobe in mineralogical and geological research is quantitative chemical analysis of grains as small as a few microns in diameter, individual grains in a rock or can be analyzed in thin section and polished section, analysis can be made comparatively short time, methods in non-destructure, to photographical and crystallographical information. This paper was written in order to document data evaluation procedure for quantitative energy dispersive election probe analysis.

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화순지역 천운산층 중의 점토암의 조직과 그 성인적 의미 (Textures of Claystones and Their Genetic Significances in the Cheonunsan Formation of the Hwasoon Area)

  • 김수진;추창호;이동진
    • 한국광물학회지
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    • 제11권1호
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    • pp.13-19
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    • 1998
  • Textures of claystones of the Cheonunsan Formation in the Hwasoon area have been studied using optical microscope and electron microprobe. Microscopic images were observed under the optical microscope using the transmitted polarizing light from thin sections and under the electron microprobe using the back-scattered electron beam from the polished sections. Identification of minerals were made using X-ray diffraction analysis and chemical analysis by electon microprobe. Textural analyses show that the original sedimentary claystones rich in aluminium were subjected to metamorphism by which they changed to the metamorphosed claystone consisting mainly of chloritoid, quartz, andalusite and illite. Later intensive hydrothermal kaolinization of this metamorhosed claystones resulted in the formation of high-aluminous claystones rich in kaolinite exhibiting various complicated replacement textures.

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A Note on Biogenic Effects of Coralloid Speleothems in Round Mountain Lava Cave, Oregon, U.S.A.

  • Kashima, Naruhiko;Ogawa, Takanori
    • 동굴
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    • 제9권
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    • pp.3-7
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    • 1999
  • Corralloid speleothems from Round Mountain lave cave are are studied by scanning microscope and electron microprobe analyses. Scanning microscopy observation indicates that the diatom Melosira seems to contribute significantly to siliceous coralloid speleothems Electron microprobe confirms the presence of diatom and fragmental minerals(plagioclase and orthopyroxene) in coralloid speleothems. Chemical analysis of 3 diatom cells gives SiO2(74.8%), Al2O3(0.12%), FeO(0.11%), CaO(0.47%) and MgO(0.81%).

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Preliminary Study on the Visualization and Quantification of Elemental Compositions in Individual Microdroplets using Solidification and Synchrotron Radiation Techniques

  • Ma, Chang-Jin;Tohno, Susumu;Kasahara, Mikio
    • Asian Journal of Atmospheric Environment
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    • 제5권1호
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    • pp.56-63
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    • 2011
  • Quantifying the solute composition of a cloud droplet (or a whole droplet) is an important task for understanding formation processes and heating/cooling rates. In this study, a combination of droplet fixation and SR-XRF microprobe analysis was used to visualize and quantify elements in a micro-scale droplet. In this study, we report the preliminary outcome of this experiment. A spherical micro-scale droplet was successfully solidified through exposure to ${\alpha}$-cyano-acrylate vapor without affecting its size or shape. An X-ray microprobe system equipped at the beam line 37XU of Super Photon ring 8 GeV (SPring-8) was applied to visualize and quantify the elemental composition in an individual micro-scale droplet. It was possible to reconstruct 2D elemental maps for the K and Cl contained in a microdroplet that was dispensed from the 10-ppm KCl standard solution. Multi-elemental peaks corresponding to X-ray energy were also successfully resolved. Further experiments to determine quantitative measures of elemental mass in individual droplets and high-resolution X-ray microtomography (i.e., 3D elemental distribution) are planned for the future.

Highly Productive Process Technologies of Cantilever-type Microprobe Arrays for Wafer Level Chip Testing

  • Lim, Jae-Hwan;Ryu, Jee-Youl;Choi, Woo-Chang
    • Transactions on Electrical and Electronic Materials
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    • 제14권2호
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    • pp.63-66
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    • 2013
  • This paper describes the highly productive process technologies of microprobe arrays, which were used for a probe card to test a Dynamic Random Access Memory (DRAM) chip with fine pitch pads. Cantilever-type microprobe arrays were fabricated using conventional micro-electro-mechanical system (MEMS) process technologies. Bonding material, gold-tin (Au-Sn) paste, was used to bond the Ni-Co alloy microprobes to the ceramic space transformer. The electrical and mechanical characteristics of a probe card with fabricated microprobes were measured by a conventional probe card tester. A probe card assembled with the fabricated microprobes showed good x-y alignment and planarity errors within ${\pm}5{\mu}m$ and ${\pm}10{\mu}m$, respectively. In addition, the average leakage current and contact resistance were approximately 1.04 nA and 0.054 ohm, respectively. The proposed highly productive microprobes can be applied to a MEMS probe card, to test a DRAM chip with fine pitch pads.

pH-ISFET 마이크로프로브의 製作과 그 生醫學的 應用 (Fabrication and Its Biomedical Application of the pH-ISFET Microprobe)

  • 이광만;손병기
    • 대한전자공학회논문지
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    • 제25권11호
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    • pp.1335-1341
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    • 1988
  • A pH-ISEFET microprobe for in vivo measurements has been fabricated by combining ISFET (SL-IIS) chip and capillary thin film reference electrode. A two-step TCE oxidation for the gate oxide layer and multilayer encapsulation using silicone rubber and epoxy were specially used for the improvement of the stability and temperature dependence of the ISFET's. The measured sensitivit, response time and temperature dependence of the pH-ISFET microprobes are 50 mV/pH, less than one second, and - 0.01 pH/$^{\circ}$ , respectively. By operating continuously more than 40 days, a long term stability of 0.016 pH/day is obtained. The result of pH monitoring of femoral arterial blood in a rabbit is fairly good agreement with the value of blood gas analysis.

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염화알루미늄·고분자촉매의 합성과 에스테르화 반응촉매로서의 효과에 관한 연구 (Studies on the Synthesis of Aluminum Chloride Polymeric Catalysts and Its Catalytic Effect for the Esterification)

  • 황규자;이용근
    • 대한화학회지
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    • 제22권3호
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    • pp.184-193
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    • 1978
  • Styrene-divinylbenzene 공중합체를 이황화탄소 용매 속에서 무수염화알루미늄과 반응시켜 염화알루미늄${\cdot}$고분자촉매를 합성하여 이들의 형태를 광학현미경, 주사전자현미경으로 조사하고 원자흡광 및 electron microprobe X-선으로 분석하였다. 각종 유기산과 지방족 및 방향족 알코올과의 에스테르화반응에서 염화알루미늄${\cdot}$고분자촉매의 효과에 관하여 연구하였다.

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