Applications of gallium nitride in MEMS and acoustic microsystems

This paper covers various sensors and microsystems based on gallium nitride (GaN) micro mechanical (acoustic) resonators. III-nitrides have been a subject of extensive research for power electronics as well as photonics applications but their use in micro-electromechanical systems (MEMS) has been limited. In this paper, basic material properties of this group of materials (GaN, AlGaN, and other III-nitrides) are discussed and their current and future applications in MEMS and Microwave circuits are detailed.