Development and Evaluation of a Pt/Ti-FET-Type Hydrogen Sensor
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- Kariya Masatoshi
- Graduate School of Natural Science and Technology, Okayama University
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- Mizuhara Kouhei
- Graduate School of Natural Science and Technology, Okayama University
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- Yamaguchi Tomiharu
- Graduate School of Natural Science and Technology, Okayama University
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- Kiwa Toshihiko
- Graduate School of Natural Science and Technology, Okayama University
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- Kunitsugu Shinsuke
- Industrial Technology Center of Okayama Prefecture
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- Tsukada Keiji
- Graduate School of Natural Science and Technology, Okayama University
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A novel gate-structure FET-type hydrogen sensor (Pt/Ti-FET) that has an adhesion layer (Ti) between the catalytic metal (Pt) and the gate insulator was fabricated. The dependence of the response characteristics of the sensitivity and selectivity on the Ti thickness was investigated. The sensitivity showed dependence on Ti thickness, and higher sensitivity was obtained with a decrement in Ti thickness. In addition, the Pt/Ti-FET showed good selectivity against other gases (O2, C2H6) compared with the Pt-FET. After annealing at 260°C for 30 min under 5 Pa in a vacuum, the Pt/Ti-FET showed different response characteristics from an as-deposited Pt/Ti-FET. The annealed Pt/Ti-FETs with a thin Ti adhesion layer (below 10 nm) showed improved hydrogen sensitivity. In particular, the Ti 5-nm sample of the Pt/Ti-FET sensor showed a higher hydrogen response when exposed to 0.8% hydrogen gas (526.2 mV) compared to that of the Pt-FET sensor (415.7 mV). However, improvement in hydrogen sensitivity was not obtained in thick Ti samples. Additionally, the annealed Pt/Ti-FET showed better selectivity against O2 than as-deposited Pt/Ti-FET.
収録刊行物
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- 電気学会論文誌E(センサ・マイクロマシン部門誌)
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電気学会論文誌E(センサ・マイクロマシン部門誌) 130 (8), 407-411, 2010
一般社団法人 電気学会
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詳細情報 詳細情報について
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- CRID
- 1390001204461007360
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- NII論文ID
- 10026498255
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- NII書誌ID
- AN1052634X
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- BIBCODE
- 2010IJTSM.130..407K
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- ISSN
- 13475525
- 13418939
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- NDL書誌ID
- 10765447
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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