Micro power generator with high-performace polymer electret

Vibration-driven electret generator has been developed with the aid of MEMS technologies. Parylene high-aspect-ratio spring is successfully microfabricated to support an in-plane seismic mass. Resonant frequency as low as 37Hz has been achieved with a large in-plane amplitude of 1 mm. With our early prototype, we have obtained 21 V p-p voltage output.