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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51769

Title: High Sensitivity Ethanol Gas Sensor Integrated with a Solid-State Heater and Thermal Isolation Improvement Structure for Legal Drink-drive Limit Detecting
Authors: Jyh-JierHo
Contributors: 國立臺灣海洋大學:電機工程學系
Keywords: Ethanol gas sensor
MEMS technology
Array integration
Date: 1998-08-15
Issue Date: 2018-12-21T08:29:00Z
Publisher: Sensors and Actuators B: Chemical
Abstract: Abstract: The paper reports the successful fabrication of ethanol gas sensors with tin-dioxide (SnO2) thin films integrated with a solid-state heater, which is realized with technologies of micro-electro-mechanical systems (MEMS), and are compatible with VLSI processes. The main sensing part with dimensions of 450×400 μm2 in this developed device is composed of a sensing SnO2 film, which is fabricated by electron-gun evaporation with proper annealing in ambient oxygen gas to yield fine particles and good structure. An integrated solid-state heater with a 4.5 μm-thick cantilever bridge (1000×500 μm2) structure is made of silicon carbide (SiC) material by MEMS technologies. The sensitivity for 1000 ppm ethanol gas reaches as high as 90 with 10 s and 2 min for the response and recovery time, respectively, at an operating temperature of 300°C. Those experimental results also exhibit a much superior performance to that of a popular commercial ethanol gas sensor TGS-822. Therefore, the developed sensor with high performance is a good candidate for some specific application in automobile to detect drink-drive limit and allows an array integration available with various films for controlling each element at separate resistance.
Relation: 50(3) pp.227-233
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51769
Appears in Collections:[電機工程學系] 期刊論文

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