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A novel stylus profiler without nonlinearity and parasitic motion for FPD inspection system
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  • A novel stylus profiler without nonlinearity and parasitic motion for FPD inspection system
  • A novel stylus profiler without nonlinearity and parasitic motion for FPD inspection system
저자명
Jung. Hyun-Soo,Hong. Min-Sung,Lee. Soo-Hun,Park. June-Ho,Kang. Dong-Woo,Lee. Moon-G.
간행물명
Journal of mechanical science and technology
권/호정보
2007년|21권 10호|pp.1491-1497 (7 pages)
발행정보
대한기계학회
파일정보
정기간행물|ENG|
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기타
이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
서지반출

기타언어초록

There are increasing needs to inspect micro-pattern of flat panel display (FPD) device such as PDP and LCD. The inspection system should be able to measure over large size mother glass with high productivity and accuracy. Stylus profilers are adopted as an inspection system. To scan over large and heavy FPD device specimen, a "tip-scanning" head for stylus profiler is required. A simple method to realize a tip-scanning system is to miniaturize the whole scanning unit. In this study, a novel stylus profiler is proposed as a tip-scanning stylus profiler. The novel stylus profiler has leaf spring instead of conventional lever and pivot. To measure position of stylus an optical senor is used. Linear variable differential transformer is applied to feed-back scanning stage displacement. The stage is actuated by a voice coil motor (VCM). Target performances of the stylus profiler head are in the stroke over $20;{mu}m$ with high accuracy. Specifications of xy-scanning stage are over $250;{mu}m{ imes}250;{mu}m$ and high bandwidth over 20 Hz. The magnetic and elastic characteristics of the mechanism are designed based on finite element (FE) analysis. After fabrication of the head and stage, they are integrated. Current amplifier and feedback controller are also developed. The performance of the stylus profiler is also validated by inspecting standard sample.