Vibration power generator

A vibration power generator, comprising:

• a fixed substrate;
• a vibrating body having a surface opposed to a surface of the fixed substrate, the vibrating body being vibratable with respect to the fixed substrate;
• a plurality of electret electrodes aligned in a vibration direction of the vibrating body on one of the surface of the fixed substrate and the surface of the vibrating body;
• and
• a plurality of first fixed electrodes and a plurality of second fixed electrode, each of the plurality of first fixed electrodes and each of the plurality of second fixed electrodes being alternately aligned in the vibration direction on the other of the surface of the fixed substrate and the surface of the vibrating body,
• wherein when the vibrating body is not at a resting position with respect to the fixed substrate,
• a distance (s) between each of the plurality of first fixed electrodes and each of the plurality of second fixed electrodes is not shorter than a half length of a distance (gap g) between each of the plurality of electret electrodes and each of the plurality of first fixed electrodes or each of the plurality of second fixed electrodes.

A vibration power generator, comprising:

• a fixed substrate;
• a vibrating body having a surface opposed to a surface of the fixed substrate, the vibrating body being vibratable with respect to the fixed substrate;
• a plurality of electret electrodes aligned in a vibration direction of the vibrating body on one of the surface of the fixed substrate and the surface of the vibrating body;
• and
• a plurality of first fixed electrodes and a plurality of second fixed electrodes, each of the plurality of first fixed electrodes and each of the plurality of second fixed electrodes being alternately aligned in the vibration direction on the other of the surface of the fixed substrate and the surface of the vibrating body;
• wherein when the vibrating body is at a resting position, each of the plurality of electret electrodes overlaps with one of each of the plurality of first fixed electrodes and each of the plurality of second fixed electrodes and does not overlap the other of each of the plurality of first fixed electrodes and each of the plurality of second fixed electrodes if viewed from a top down perspective, and
• a width of each of the plurality of electret electrodes is longer than a width of the one of each of the plurality of first fixed electrodes and each of the plurality of second fixed electrodes.