Piezoelectric energy harvesting bending structure and the method of manufacturing thereof

A piezoelectric bimorph cantilever beam system for harvesting electrical energy from vibrations, the system comprising:

• a shim including a first main surface, a second main surface opposite the first main surface, a proximal end connected to an anchor, and a distal end opposite the proximal end;
• a first piezoelectric layer made of a piezoelectric material and laminated on the first main surface of the shim;
• a second piezoelectric layer made of the piezoelectric material and laminated on the second main surface of the shim;
• and
• a first beam stiffener made of a material other than the piezoelectric material and provided over the first main surface of the shim adjacent to the anchor, the first beam stiffener at least partially covering the first piezoelectric layer,
• wherein the first beam stiffener has a variable thickness decreasing from the anchor towards the distal end of the shim.