Patent ID: 8212450

Claim:
A generator comprising: a first substrate including a first electrode and a second electrode and set in a state where said first electrode and said second electrode are electrically separated from each other at least on the substrate; and a second substrate including an electret member, wherein said first substrate and said second substrate are so provided as to be opposed to each other at an interval and so formed as to vibrate relatively with each other and generate by the electrostatic induction operation, said second substrate includes a third electrode and a fourth electrode, one of said third electrode and said fourth electrode is said electret member into which negative charges are stored, and the other of said third electrode and said fourth electrode is a conductive layer, one of said first electrode and said second electrode is so formed as to be capacitively coupled with said electret member into which negative charges are stored, and the other of said first electrode and said second electrode is so formed as to be capacitively coupled with said conductive layer, at least one of said third electrode and said fourth electrode is said electret member, said second electrode is located on a region opposed to said fourth electrode when said first electrode is located on a region opposed to said third electrode, while said first electrode is located on the region opposed to said fourth electrode when said second electrode is located on the region opposed to said third electrode, said electret member is formed substantially on an overall surface of said second substrate, a plurality of said conductive layers are formed on a surface of said electret member at an interval, a portion, where said conductive layers are not formed, of said electret member corresponds to said third electrode, and said conductive layers correspond to said fourth electrode, and a charge outflow inhibition film is formed on said surface of said electret member.