Micromachined Thermoelectric Hydrogen Sensor of Double-Membrane Structure

DOI Web Site Web Site Web Site 被引用文献5件 参考文献22件

この論文をさがす

説明

We have prepared a noble micromachined gas sensor by combining two identical micro-hot plates on membranes fabricated by anisotropic wet etching of silicon substrate and a thermoelectric hydrogen sensor. The thermoelectric hydrogen sensor selectively detects the hydrogen gas working with the thermoelectric effect of SiGe thin film and the Pt-catalyzed exothermic reaction of hydrogen oxidation. The double-membrane structure thermally isolates two central and rectangular membranes from the rim of a room-temperature bulk substrate, minimizing offset voltage by keeping both membranes at the same temperature. The Pt catalyst as small as 1.5×1.5 mm2 builds up the temperature difference in the thermoelectric film by the oxidation of 1% hydrogen in air, producing an output voltage of 0.38 mV as a signal at an operating temperature of 100°C.

収録刊行物

被引用文献 (5)*注記

もっと見る

参考文献 (22)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ