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권기진,김민수,박세광 ( Kijin Kwon,Minsoo Kim,Sekwang Park ) 한국센서학회 1995 센서학회지 Vol.4 No.4
Sensor system which can detect a flowing cell is designed and fabricated by semiconductor processing and EDM(Electro-chemical Discharge drilling Method). Two methods are used in this paper 1) optical method which measures the trasmitted light through the cell passage between transmitter and receiver, 2) impedance method which measures impedance change between electrodes, when cell flows in the cell passage. Experimental result using tabaco leaves shows that the output value by optical method is 0.2V to 0.7V, and the output by impedance method is 0.2V to 2V, which is bigger, but it includes an avoidable noises.
규소 기판 접합에 있어서 FT - IR 을 이용한 수산화기의 영향에 관한 해석
박세광,권기진 ( Sekwang Park,Kijin Kwon ) 한국센서학회 1994 센서학회지 Vol.3 No.2
Silicon direct bonding technology is very attractive for both silicon-on-insulator devices and sensor fabrication because of its thermal stress free structure and stability. The process of SDB includes hydration of silicon wafer and heat treatment in a wet oxidation furnace. After hydration process, hydroxyl groups of silicon wafer were analyzed by using Fourier transformation-infrared spectroscopy. In case of hydrophilic treatment using a (H₂O₂ : H₂SO₄) solution, hydroxyl groups are observed in a broad band around the 3474 cm^(-1) region. However, hydroxyl groups do not appear in case of diluted HF solution. The bonded wafer was etched by using tetramethylammonium hydroxide etchant. The surface of the self etch-stopped silicon dioxide is completely flat, so that it can be used as sensor applications such as pressure, flow and acceleration, etc..
권기진,박세광 경북대학교 센서기술연구소 1991 센서技術學術大會論文集 Vol.2 No.1
산소 포화도를 비추출방식으로 측정하기 위한 이론을 분석하였다. 두 가지의 이론 즉, 투과광 방식과 반사광 방식을 이용한 기본적인 센서의 설계와 센서의 구동회로를 나타내었다. 또한, 신호 처리 시스템의 전체 블록 다이어그램을 보였고 이 블록 다이어그램의 각 부분을 설계하였다. 그리고, 이에 관한 실험 결과도 나타내었다. 모의실험은 우유와 요오드를 섞은 매체에 여러가지 파장을 이용하여 실험하였다. 적색광 LED에서 가장 큰 반사를 나타내었고, 적색 이하의 파장에서는 거의 반사의 변화가 없었다. 이 실험에서. 적색 파장 LED 에 대한 반사는 요오드의 부피 변화에 따라 변화하였다. 그러므로, 이 파장에서의 반사는 산소 포화도를 얻기 위해 사용될 수 있을 것이다. The theory for measurement of non-invasive oxygen saturation was analyzed. The basic design of sensor and driving curcuit of the sensor were presented using two theories, i.e., transmittance and reflectance method. Overall block diagram of signal processing system was shown and each part of the block diagram was designed. Test results of this are given. The trial experiment was done by mixed medium of milk and iodine for various wave lengths of LED. The largest response of reflectance appeared at red wave length of LED and the response was mere for the wave length below red LED. From the experiment, the reflectance for red LED varies whenever the volume of iodine changes, therefore, the reflectance at this wave length can be utilized to obtain oxygen saturation.
이기찬,권기진,박세광 경북대학교 센서기술연구소 1997 센서技術學術大會論文集 Vol.8 No.1
Semiconductor type vibrometer was fabricated by using semiconductor process and micromachining technology. To measure the micro vibration force between coil and magnet, fabricated vibrometer was used. Output characteristics of micro vibration force according to the applied coil current were linear. The output results were used to get the transfer constant that is important to decide the efficiency and the performance of the coil and magnet. The output characteristics for the acoustic wave input were analysed by using the fabricated vibrometer. The fabricated vibrometer could be applicated to detect micro vibration force of acoustic wave.