Patent ID: 8237332
Filing Date: 2012-08-07
Classification: H04R,Y10T

Abstract:
1. A piezoelectric acoustic transducer comprising: a substrate in which a perforation area is formed; a piezoelectric portion which is positioned in a middle portion of the perforation area, the piezoelectric portion comprising: a deformation layer which is elastically deformable, wherein the deformation layer covers an outer circumference of the piezoelectric portion and does not overlap with a central portion of the piezoelectric portion and connects the piezoelectric portion and the substrate such that in a region between the outer circumference of the piezoelectric portion and the substrate, at least a portion of the deformation layer does not overlap with any other layer, wherein planar deformation of the piezoelectric portion is transferred to the deformation layer or deformation of the deformation layer is transferred to the piezoelectric portion, so that the deformation layer vibrates together with the piezoelectric portion.