Patent ID: 8598768

Claim:
A piezoelectric micro energy harvester comprising multiple piezoelectric micro energy harvester devices, each of the multiple piezoelectric micro energy harvester devices comprising: a substrate; an open cavity having a predetermined depth and a predetermined width and a structure of an opened upper portion, the open cavity being formed within the substrate; a first electrode pad and a second electrode pad formed on the substrate to transfer collected electrical energy to an outside; electrodes comprising a center electrode, a side electrode to collect generated electrical energy, the center electrode including one end connected to the first electrode pad and another end suspended on an upper portion of the open cavity, the side electrode including one end connected to the second electrode pad and another end suspended on the upper portion of the open cavity; and a piezoelectric film formed at a space between the center electrode and the side electrode and at an upper surface of the electrodes to generate electrical energy in accordance with a change of mechanical strain.