研究生: |
何憲龍 Ho Hsien Lung |
---|---|
論文名稱: |
微氣味蒸發與溫度感測晶片之研製 The Design and Fabrication of Micro Odor Evaporation and Temperature Sensor |
指導教授: |
曾繁根
Fangang Tseng |
口試委員: | |
學位類別: |
碩士 Master |
系所名稱: |
原子科學院 - 工程與系統科學系 Department of Engineering and System Science |
論文出版年: | 2002 |
畢業學年度: | 90 |
語文別: | 中文 |
論文頁數: | 92 |
中文關鍵詞: | 微氣味蒸發與溫度感測晶片 、微型加熱器 |
外文關鍵詞: | evaporation and temperature sensor, micro heater |
相關次數: | 點閱:2 下載:0 |
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本研究設計及製作微氣味蒸發與溫度感測晶片,晶片的微型加熱器與溫度感測器原理選擇熱阻式,並選擇阻值與溫度關係線性度良好的白金(Pt),做為微型加熱器與溫度感測器的材料。
晶片有設計(一)與設計(二),設計(一)晶片是經熱氧化法成長1μm的二氧化矽作為熱隔絕層,矽晶片先完成一面加熱器的製程,另一面再製作出溫度感測器; 設計(二)晶片則以LPCVD先沈積1μm low stress Si3N4,再以KOH蝕穿矽基材,留下氮化矽薄膜,以此為晶片的熱隔絕,溫度感測器就位在加熱器旁邊。
其中供給設計(一)晶片3.209W,發熱可達174℃以上。供給設計(二)晶片0.17959W,發熱可達386.67℃以上。溫度感測方面,設計(一)晶片在溫度範圍25~102℃,敏感度為5.329mV/℃,而設計(二)晶片,在溫度範圍29~118℃,敏感度為6.35mV/℃。
晶片蒸發與溫度感測方面,蒸發0.5μl 去離子水需要消耗3.1135焦爾的能量,蒸發完畢的時間為1.71秒,蒸發效率為0.292μl/sec,熱通量(heat flux)為7.01*108W/m2。蒸發0.1μl 香精油需要消耗1.1971焦爾的能量,蒸發完畢的時間為0.66秒,蒸發效率為0.152μl/sec,熱通量(heat flux)為2.69*108W/m2。
Micro evaporation and temperature sensor chips have been designed and fabricated in this study. The principal of heater and temperature sensor is based on the thermo-resistor effect. The material of micro heaters and temperature sensors choose Platinum (Pt), because of its good linear relationship between resistance and temperature.
There are two designs in this study. First, using 1μm thermal oxide for thermal insulator, and second, using LPCVD 1μm low stress Si3N4 as mask, and then etch through the Silicon wafer by KOH.
The chip with first design can heat up to 174℃ by applying 3.209W and the other design can achieve 386.67℃ when apply 0.17959W. The sensitivity of these two different designs of temperature sensors are 5.329 mV/℃ between 25 to 102℃and 6.35 mV/℃ between 29 to 118℃ respectively.
In the test of liquid evaporation, it needs 3.1135 J to evaporate 0.5μl water completely and the evaporation process takes 1.71 sec. The efficiency of evaporation is 0.292μl/sec, and heat flux is 7.01*108W/m2. The energy consumption to evaporate 0.1μl essential oil is 1.1971 J. And it spent 0.66sec for evaporating essential oil completely. The efficiency of evaporation is 0.152μl/sec, and heat flux is 2.69*108W/m2.
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