Abstract
In this paper, we present a polyimide-based Si membrane transfer bonding technology and its application to CMOS-compatible integration of different modes of AlN/Si composite piezoelectric MEMS resonators. The thermosetting polyimide, which has excellent chemical resistance and thermal stability, is used as a bonding adhesion, and is successfully removed as a sacrificial layer by O 2 plasma to release free-standing MEMS devices. The whole process temperature is below 350 °C and compatible with CMOS LSI. Using this technology, different modes of AlN/Si resonators, which are film bulk acoustic wave resonators and wine-glass mode disk-type resonators, have been co-fabricated on the same wafer. We also fabricated a ladder-type FBAR filter with a center frequency of 7.71 GHz and a mechanically coupled disk-array filter with a center frequency of 292.8 GHz.
Original language | English |
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Article number | 095027 |
Journal | Journal of Micromechanics and Microengineering |
Volume | 20 |
Issue number | 9 |
DOIs | |
Publication status | Published - 2010 Sep 1 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Mechanics of Materials
- Mechanical Engineering
- Electrical and Electronic Engineering