A piezoelectric unimorph has one active (i.e. piezoelectric) layer and one inactive (i.e. non-piezoelectric) layer.
WIPO ASSIGNS PATENT TO PEOPLE & ENVIRONMENT FOR "PIEZOELECTRIC GENERATOR UNIT USING PIEZOELECTRIC BIMORPH" (SOUTH KOREAN INVENTOR)
Sep 02, 2011; GENEVA, Sept. 2 -- Publication No. WO/2011/105642 was published on Sept. 01. Title of the invention: "PIEZOELECTRIC GENERATOR...