Patent ID: 6978032

Claim:
A piezoelectric speaker, comprising: a piezoelectric element; a diaphragm having placed thereon the piezoelectric element to form a vibrator; a frame portion surrounding the diaphragm; a damper portion connecting the frame portion and the diaphragm, and supporting the diaphragm so that the diaphragm can linearly vibrate; and an edge portion formed in an area delineated by the diaphragm, the damper portion, and the frame portion, wherein the diaphragm is made of a clad material having layers of a first material and a second material laminated together to form a sandwich structure in cross sections, wherein the first material is different than the second material, wherein the clad material includes: two surface layers made of the first material to form a top surface and a bottom surface of the diaphragm; and a single core layer made of the second material that is different from the first material, and bonded between the two surface layers, wherein the clad material is subjected to a predetermined process to integrally form the diaphragm, the damper portion, and the frame portion on a same plane, and wherein the edge portion is formed of a different material than the first material and the second material.