• 제목/요약/키워드: Force Display

검색결과 378건 처리시간 0.032초

Fourier transform infrared spectroscopy를 이용한 SiNx박막의 수소농도 연구 (Study of the hydrogen concentration of SiNx film by Fourier transform infrared spectroscopy)

  • 이석열;최재하;제지홍;이임수;안병철
    • 한국진공학회지
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    • 제17권3호
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    • pp.215-219
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    • 2008
  • 실리콘 웨이퍼 위에 Plasma Enhanced Chemical Vapor Deposition (PECVD) 방법으로 증착 된 SiNx 박막의 수소 함량을 측정하였다. 제작된 SiNx 박막은 Fourier Transform Infrared Spectroscopy (FT-IR) 사용하여 박막의 수소함량과 결합상태를 확인하였으며, Atomic Force Microscopy (AFM) 측정을 통하여 박막의 표면 거칠기를 비교, 시료의 조성비 평가를 위하여 Rutherford Backscattering Spectrometry (RBS)을 사용하였다. 또한 SiNx박막의 조성확인을 위하여 Photoluminescence(PL)를 이용하여 FT-IR spectrum의 결과와 비교 해석하였다. FT-IR에서 NH의 수소함량(at%)이 0.92 %에서 0.64 %로 낮아질 수록 AFM을 이용한 표면 거칠기는 12.8 $\AA$에서 10.8 $\AA$로 낮아지고, Si양이 상대적으로 많아지는 것을 PL에서 확인하였으며, RBS에서도 시뮬레이션을 통해 비슷한 결과를 얻을 수 있었는데, 이는 FT-IR을 사용함으로써 SiNx 박막의 수소 함량의 측정이 가능하다는 것을 보여주므로 단위공정에서 신속하게 SiNx 박막 분석이 가능함을 알 수 있었다.

Cooperative Manipulation of a Virtual Object by Multiple Remote Users

  • Choi, Hyouk-Ryeol;Ryew, Sung-Moo
    • Journal of Mechanical Science and Technology
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    • 제14권9호
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    • pp.956-967
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    • 2000
  • In this paper, we explore the issues of force display in the cooperative virtual environment shared by multiple users distributed over the network with heterogeneous hardware platforms. The proposed method is to cope with the problem of small time delay and the difference of sampling rate in the distributed configuration. In the proposed approach the interaction forces of the participants are just treated as the independent sources of acceleration. Thus the action of a participant simply changes the acceleration of the virtual object and consequently the states of the virtual object will be updated. When the updated states are reported to all the participants, the information on the time of state changes is delivered, too. Employing the discrete state information updated by the other users, each user modifies his own virtual environment and pseudo-realtime simulation can be realized. Excluding the software interface and the communication technique, it is proposed the simulation method for the operation of respective users and the way of calculating the driving input to the display device. For experimental verification we construct a cooperative virtual environment shared by two remote users and outline the results of experiments.

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SMA을 이용한 3차원 형상제시기의 와이어프레임 구동 유닛 (Wire frame drive unit ofa SMA-based 3D shape display)

  • 추용주;김영민;송재복;박신석
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2006년도 춘계학술대회 논문집
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    • pp.439-440
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    • 2006
  • This research proposes a novel method of shape display to present 3-dimensional objects. Shape displays allow us to feel the actual volume of the object, unlike conventional 2D visual displays of 3D objects. The proposed method employs a wire frame structure to present 3D objects. The wire frame is composed of small units driven by shape memory alloy(SMA) actuators. The drive unit is analogous to the agonist-antagonist system of animal musculoskeletal systems, where the SMA actuators serve as agonist and antagonist muscles. The force in the SMA actuator is controlled by electrical current. The drive unit is equipped with the locking mechanism so that it can sustain the external force exerted by the user as well as the own weight of the wire frame structure. By controlling the current into the SMA actuator and locking mechanism, we call control the angle of the drive unit. A chain of drive units enables presentation of 2 dimensional objects. 3 dimensional presentations are possible by collecting the chains of drive units.

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초소형 고집적 모바일 커넥터부품 구조해석 (Structural Analysis of High-Density Mobile Micro-Connector)

  • 전용준;신광호;허영무
    • Design & Manufacturing
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    • 제9권2호
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    • pp.1-5
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    • 2015
  • Recently, as small-sized display products such as mobile phones and digital cameras have become lighter and smaller, the size of electric signal delivery part, connector for the mobile display products, also, needs to become smaller, so high-density integration like shortening the distance between signal delivery media, conductors is necessary. With the micro and high-density integration of the connector, it is necessary to maintain contact to a certain degree for keeping intensity and delivering electric signal smoothly to prevent a defect with a specific impact. Accordingly, this study carried out a structural analysis according to the operating mechanisms of 0.16CHP Class Bottom Contact FPC Connector and 0.24CHP Class BTB Connector mostly used in small-sized mobile display products such as mobile phones and digital cameras. As a result of the analysis, both connectors had lower than 997MPa, yield strength of connector material C5240-XSH, so it is judged that permanent plastic deformation would not occur, and that a contact force between the connector and FPC film occurs to a certain degree, so that there would not be any defect in electric signal delivery.

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2차원 형상 제시를 위한 SMA에 기반한 와이어프레임 구조의 개발 (Development of SMA-based Wireframe Structure for 2D Shape Display)

  • 추용주;송재복
    • 한국정밀공학회지
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    • 제25권5호
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    • pp.82-88
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    • 2008
  • This paper proposes a novel method of 2 dimensional shape display. Shape displays allow us to feel tile actual volume of the object, unlike conventional 2D visual displays of 3D objects. The proposed method employs a wireframe structure to present 2D or 3D objects. The wireframe is composed of small units driven by shape memory alloy (SMA) actuators. The drive unit is analogous to the agonist-antagonist system of animal musculoskeletal systems, where the SMA actuators serve as agonist and antagonist muscles. The force in the SMA actuator is controlled by electrical current. The drive unit is equipped with the locking mechanism so that it can sustain the external force exerted by the user as well as the own weight of the wireframe structure. By controlling the current into the SMA actuator and locking mechanism, we can control the angle of the drive unit. A chain of drive units enables presentation of 2 dimensional objects. 3 dimensional presentations are possible by collecting the chains of drive units.

300 mm 웨이퍼 위의 에어로졸 나노 입자의 증착 장비 개발을 위한 수치 해석적 연구 (Numerical Simulation of Deposition Chamber for Aerosol Nanoparticles Upward 300 mm Wafer)

  • 안강호;안진홍;이관수;임광옥;강윤호
    • 반도체디스플레이기술학회지
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    • 제4권1호
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    • pp.49-53
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    • 2005
  • The nanoparticle deposition chamber, which is used for quantum dot semiconductor memory applications, is designed by means of numerical simulation. In this research, the numerical simulations for deposition chamber were performed by commercial software, FLUENT. The deposition of nanoparticles is calculated by diffusion force, thermophoresis and electrophoresis of particles. As a results, when the diffusion force was considered, the most of particles deposited in the wall of deposition chamber. But as considering thermophoresis and electrophoresis of particles, the particles were deposited wafer surface, perfectly.

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비접촉식 유리 평판 이송 장치 공기 패드 형상에 대한 연구 (A Study on the Air Cushion Pad of Non-contact Glass Transportation Unit)

  • 전현주;김광선;임익태
    • 한국반도체및디스플레이장비학회:학술대회논문집
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    • 한국반도체및디스플레이장비학회 2006년도 추계학술대회 발표 논문집
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    • pp.138-144
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    • 2006
  • Non-contact transportation of a large-sized glass plate using air cushion for the sputtering system of liquid crystal display panel was considered. The gas is injected through multiple small holes to maintain the force for levitating glass plate. Complex flow field and resulting pressure distribution on the glass surface was numerically studied to design the air injection pad. The exhaust hole size was varied to obtain evenly distributed pressure distribution at fixed diameter of the injection hole. Considering the force for levitating glass plate, the diameter of the exhaust hole of 30 to 40 times of the gas injection hole was recommended.

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표면전도 전자방출 표시장치의 전자방출 구조해석 (Analysis of electron emission mechanism in surface conduction electron emission displays)

  • 김영삼;김영권;오현주;조대근;길도현;김대일;강준길;강승언;최은하
    • 한국진공학회지
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    • 제8권4A호
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    • pp.410-416
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    • 1999
  • It is confirmed that the cause of anode current in SEDs (surface conduction electron emission displays) is the inertial force of electron emitted from the cathode surface in the calculation of electron trajectory. In the fissure of sub-micron, most of electrons emitted from the area of the cathode edge flow into the coplanar anode, while some electrons are emitted into the display surface by the current ratio of $10^{-3}$. The later electrons are forced to fly into the display surface by the centrifugal force due to the curved electric field between top side surfaces near the fissure.

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Al 6061의 드릴가공에서 공구코팅과 공정변수가 표면정도에 미치는 영향 (Effect of Coating and Machining Parameters on Surface Finish in Dry Drilling of Aluminium 6061)

  • 최만성
    • 반도체디스플레이기술학회지
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    • 제14권2호
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    • pp.47-52
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    • 2015
  • In this paper, the performance of uncoated- and Titanium nitride aluminium TiAlN-PVD coated- carbide twist drills were investigated when drilling aluminium alloy, Al 6061. This research focuses on the optimization of drilling parameters using the Taguchi technique to obtain minimum surface roughness and thrust force. A number of drilling experiments were conducted using the L9 orthogonal array on a CNC vertical machining center. The experiments were performed on Al 6061 material l blocks using uncoated and coated HSS twist drills under dry cutting conditions. Analysis of variance(ANOVA) was employed to determine the most significant control factors. The main objective is to find the important factors and combination of factors influence the machining process to achieve low surface roughness and low cutting thrust force. From the analysis of the Taguchi method indicates that among the all-significant parameters, feed rate are more significant influence on surface roughness and cutting thrust than spindle speed.

압력 센서를 이용한 보행 패턴 모니터링 시스템 구현 (Implementation of Gait Pattern Monitoring System Using FSR(Force Sensitive Resistor) Sensor)

  • 김기완
    • 반도체디스플레이기술학회지
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    • 제20권2호
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    • pp.56-60
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    • 2021
  • Recently, technologies for internet of things have been rapidly advanced with development of network. Also interest in smart healthcare that informs about motion information of users has been growing. In this paper, a system that is monitoring the weight on both feet by using aduino and FSR(Force Sensitive Resistor) Sensor is implemented. A 4-channel sensor driver module was implemented to measure a more accurate weight value. It is monitoring the weight on both feet by the using an application for either your PC or mobile device. Mobile applications can contribute to reducing human damage by sending messages along with location in emergency situations, such as injuries caused by falls during outdoor activities.