Patent ID: 8536763
Filing Date: 2013-09-17
Classification: G10K,H01L,Y10T

Abstract:
1. An ultrasonic transducer comprising: a support member that has an opening; a diaphragm supported by the support member, the diaphragm having a first surface and a second surface opposite to the first surface, the first surface having a concavity, the second surface covering the opening; and a piezoelectric member covering the concavity of the diaphragm so as to have an air gap therebetween, wherein the second surface of the diaphragm is exposed to the opening, the piezoelectric member is fixed to the first surface of the diaphragm at a periphery of the concavity, and when electric power is applied to the piezoelectric member, the concavity of the diaphragm expands toward the opening.