High-k dielectrics for application in broadband radio frequency-microelectromechanical system capacitive shunt switch (特集 強誘電体のセンサ・マイクロマシン応用)
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概要
- 論文の詳細を見る
130 nm-thick lead zirconate titanate(PZT)/45 nm-thick HfO2 stack and single 45 nm-thick HfO2 dielectric film were utilized as insulator layer in π-type radio frequency (RF) capacitive shunt switches for achieving high isolation performance in broadband application. Thin PZT film in perovskite structure mainly with (1 1 1) orientation was successfully prepared at low temperature (500°C) using sol-gel method. The thin PZT film exhibited excellent ferroelectric properties and high dielectric constant (k ≈ 1185). Thin HfO2 film was prepared by sputtering method in a gas mixture of O2 and Ar. The thin HfO2 film had the dielectric constant of about 17 and the dielectric strength of about 24 MV/cm. The switch of PZT/HfO2 stack dielectric showed isolation performance better than -20 dB in the frequency range of 1 ∼ 35 GHz. The switch of HfO2 had isolation performance better than -40 dB in the frequency of 5 ∼ 35 GHz, suggesting its attractive prospective in practical broadband application.
- 社団法人 電気学会の論文
- 2007-12-01
著者
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Zhang Yi
National Institute Of Advanced Industrial Science And Technology (aist)
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Lu Jian
National Institute Of Advanced Industrial Science And Technology (aist)
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Ichiki Masaaki
Advanced Manufacturing Research Institute National Instititue Of Advanced Industrial Science And Tec
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ZHANG Yi
Advanced Manufacturing Research Institute, National Instititue of Advanced Industrial Science and Te
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LU Jian
Advanced Manufacturing Research Institute, National Instititue of Advanced Industrial Science and Te
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ONODERA Kazumasa
Advanced Manufacturing Research Institute, National Instititue of Advanced Industrial Science and Te
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MAEDA Ryutaro
Advanced Manufacturing Research Institute, National Instititue of Advanced Industrial Science and Te
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Maeda Ryutaro
National Institute Of Advanced Industrial Science And Technology (aist)
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Maeda Ryutaro
Advanced Manufacturing Research Institute National Institute Of Advanced Industrial Science And Tech
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Onodera Kazumasa
Advanced Manufacturing Research Institute National Instititue Of Advanced Industrial Science And Tec
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Maeda Ryutaro
Advanced Manufacturing Research Institute (AMRI), National Institute of Advanced Industrial Science and Technology (AIST), 1-2-1 Namiki, Tsukuba, Ibaraki 305-8564, Japan
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