Evaluation of gas permeability for micro-scale thin polymer film with encapsulated MEMS damped oscillator

Ryunosuke Gando, Naofumi Nakamura, Yumi Hayashi, Daiki Ono, Kei Masunishi, Yasushi Tomizawa, Hiroaki Yamazaki, Tamio Ikehashi, Yoshiaki Sugizaki, Hideki Shibata

研究成果: Conference article査読


We present a practical method to evaluate gas permeability for thin polymer films using an encapsulated micro-electro-mechanical-system (MEMS) oscillator. Previously, we have developed a hermetic thin-film dome structure for RF-MEMS tunable capacitor, using conventional back-end-of-the-line (BEOL) processes. The dome is made of multiple layers including a polymer film, whose gas permeability is an important factor with respect to productivity and reliability. So far, it had been difficult to evaluate the gas permeability for such small and thin polymer films with sub-millimeter diameter and micron-scale thickness. In this evaluation method, the pressure dependence of air-damping oscillation is used to measure the permeability. As a demonstration, we carried out a permeability measurement of a 0.5-mm-diameter dome sealed with a thin (1 μm) polymer film. The resulting permeability coefficient is found to be 1× 10-16 mol/m/Pa/s, at room temperature.

ジャーナルProceedings of IEEE Sensors
出版ステータスPublished - 2014 12月 12
イベント13th IEEE SENSORS Conference, SENSORS 2014 - Valencia, Spain
継続期間: 2014 11月 22014 11月 5

ASJC Scopus subject areas

  • 電子工学および電気工学


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