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실리콘 미세 가공을 이용한 열전형 미소유량센서 제작 및 특성

Fabrication and characteristics of micro-machined thermoelectric flow sensor

  • 이영화 (충남대학교 재료공학과) ;
  • 노성철 (한국기계연구원 열유체공정기술연구부) ;
  • 나필선 (충남대학교 재료공학과) ;
  • 김국진 (한국표준과학연구원 전자기표준부) ;
  • 이광철 (한국표준과학연구원 전자기표준부) ;
  • 최용문 (한국표준과학연구원 물리표준부) ;
  • 박세일 (한국표준과학연구원 전자기표준부) ;
  • 임영언 (충남대학교 재료공학과)
  • Lee, Young-Hwa (Department of Material Engineering, Chungnam National University) ;
  • Roh, Sung-Cheoul (Thermo-Fluid System Department, Korea Institute of Machinery and Materials) ;
  • Na, Pil-Sun (Department of Material Engineering, Chungnam National University) ;
  • Kim, Kook-Jin (Division of Electromagnetic Metrology, Korea Research Institute of Standards and Science) ;
  • Lee, Kwang-Chul (Division of Electromagnetic Metrology, Korea Research Institute of Standards and Science) ;
  • Choi, Yong-Moon (Division of Physical Metrology, Korea Research Institute of Standards and Science) ;
  • Park, Se-Il (Division of Electromagnetic Metrology, Korea Research Institute of Standards and Science) ;
  • Ihm, Young-Eon (Department of Material Engineering, Chungnam National University)
  • 발행 : 2005.01.30

초록

A thermoelectric flow sensor for small quantity of gas flow rate was fabricated using silicon wafer semiconductor process and bulk micromachining technology. Evanohm R alloy heater and chromel-constantan thermocouples were used as a generation heat unit and sensing parts, respectively. The heater and thermocouples are thermally isolated on the $Si_{3}N_{4}/SiO_{2}/Si_{3}N_{4}$ laminated membrane. The characteristics of this sensor were observed in the flow rate range from 0.2 slm to 1.0 slm and the heater power from 0.72 mW to 5.63 mW. The results showed that the sensitivities $(({\partial}({\Delta}V)/{\partial}(\dot{q}));{\;}{\Delta}V$ : voltage difference, $\dot{q}$ : flow rate) were increased in accordance with heater power rise and decreasing of flow rate.

키워드

참고문헌

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