Abstract—In this paper, we investigate loss mechanisms in piezoelectric-on-silica bulk acoustic wave resonators, including those resulting from thermoelastic damping (TED), surface roughness, and supporting tethers. Alternate resonator designs, piezoelectric materials, and fabrication processes are demonstrated to empirically test these loss mechanisms. Quality factors (Qs) in the order of �…
Abstract—In this paper, design, analysis, and implementation of a piezoelectric microelectromechanical systems (MEMS) oscillator on an ovenized microplatform is presented. An oxiderefill process is used to compensate the first-order temperature coefficient of frequency of MEMS resonators, as well as to realize thermal isolation structures. The technology enables fabrication of low-power oveni…