中国物理B ›› 2011, Vol. 20 ›› Issue (3): 37701-037701.doi: 10.1088/1674-1056/20/3/037701
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
王立峰, 黄庆安, 唐洁影, 廖小平
Wang Li-Feng(王立峰)†, Huang Qing-An(黄庆安),Tang Jie-Ying(唐洁影),and Liao Xiao-Ping(廖小平)
摘要: Charging is one of the most important reliability issues in radio frequency microelectro- mechanical systems (RF MEMS) capacitive switches since it makes the actuation voltage unstable. This paper proposes a hybrid model to describe the transient dielectric charging and discharging process in the defect-rich amorphous SiO2 RF MEMS capacitive switches and verifies experimentally. The hybrid model contains two parts according to two different charging mechanisms of the amorphous SiO2, which are the polarisation and charge injection. The models for polarisation and for charge injection are established, respectively. Analysis and experimental results show that polarisation is always effective, while the charge injection has a threshold electric field to the amorphous SiO2 film. Under different control voltage conditions, the hybrid model can accurately describe the experimental data.
中图分类号: (Dielectric thin films)