The application of scanning laser interferometry (SLI) and scanning acoustic force microscopy (SAFM) for the characterization of acoustic vibrations at GHz frequencies in RF resonators is combined and discussed in this work. As a model example, the characterization of a film bulk acoustic resonator (FBAR), including vibration amplitude mapping, decomposition of vibration images into acoustic modes, mode shape reconstruction, dynamic visualization of acoustic vibrations and measurement of dispersion curves, is accomplished by the combination of both techniques.
Published in:
Micro Electro Mechanical Systems, 2005. MEMS 2005. 18th IEEE International Conference on
Date of Conference: 30 Jan.-3 Feb. 2005