Patent ID: 9269884
Filing Date: 2016-02-23
CPC Classification: A61B,B06B,G01S,G10K,H01L

Claim Text:
1. An ultrasonic transducer comprising: a substrate including an interior surface defining an opening; a supporting film being configured on the substrate to cover the opening, the supporting film including an opening-overlapping part overlapping with the opening in a plan view in a thickness direction of the substrate; and a piezoelectric element being configured at the opening-overlapping part such that the opening-overlapping part is arranged between the opening and the piezoelectric element in the thickness direction, the opening-overlapping part having a first portion with a center of gravity, a second portion arranged inward relative to the interior surface, and a third portion arranged between the first and second portions in the plan view, the first portion having a thickness in the thickness direction smaller than the second portion, the second portion being closer to the substrate than the first portion is to the substrate, the second portion having a uniform thickness in the thickness direction.