PIEZOELECTRIC MICROSPEAKER CAPABLE OF OFFSETTING AN INITIAL STRESS DUE TO A RESIDUAL STRESS BY SYMMETRICALLY FORMING A LOWER DRIVING UNIT AND AN UPPER DRIVING UNIT, AND A MANUFACTURING METHOD THEREOF

摘要

PURPOSE: A piezoelectric microspeaker and a manufacturing method thereof are provided to control the distortion of a signal in the alternating current applying state by symmetrically placing an upper driving unit and a lower driving unit.;CONSTITUTION: A lower driving unit(102) and a upper driving unit(103) are symmetrically formed around a vibration plate(101). The lower driving unit comprises a first driving electrode(201), a first piezo-plate(202) and a first common electrode(203) connected to a common power supply. The upper driving unit comprises a second driving electrode(301), a second piezo-plate(302) which has a form transformed according to a voltage and a second common electrode(303) connected to the common power supply. The first and the second driver electrodes are connected to a driving power. The first and the second common electrodes are connected to a common power supply.;COPYRIGHT KIPO 2010