• 제목/요약/키워드: 신용덕

검색결과 136건 처리시간 0.033초

파이프 재질에 따른 절연유의 대전및재전에 관한 연구 (A Study on the Streaming Electrification and Static Charge Elimination of Insulating Oil on Pipe Materials.)

  • 김용운;조영규;신용덕;정해덕;이덕출
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1993년도 춘계학술대회 논문집
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    • pp.72-75
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    • 1993

  • The characteristic of streaming electrification and static charge diminution in Cu, Fe and Sus pipes were investigated. The Cu and Fe pipes are charged positively, whereas the Sus pipes are charged negatively. Electrification rate in Cu and Fe pipes increases with increasing a pipe length for no-charged insulating oil. The electrification rate in Cu and Fe pipes abruptly increase with increasing the temperature and flow rate of insulating oil but decrease in Sus pipes. The current flows as a direction of insulating oil in all pipes.

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통신기기용 대역통과필터의 공정에 관한 연구 (A study on Photolithography of band pass filter for communication devices)

  • 이동윤;신용덕
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2002년도 춘계학술대회 논문집 유기절연재료 전자세라믹 방전플라즈마 일렉트렛트 및 응용기술
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    • pp.247-250
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    • 2002

  • SAW filters were fabricated on $LiNbO_3$ substrates to evaluate frequency response and properties of photolithography. In the both of etch and lift-off methods, lift off method was superior to etch method in fabrication process. Frequency response property was measured by network analyzer. From measurement of acoustic property, SAW propagation velocity was 3574.9m/sec for $LiNbO_3$ SAW filter.

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