Ultrasonic transducer and ultrasonic treatment device including the same

Abstract

An ultrasonic transducer, including a transducer body having a radiation surface that is curved in shape, the transducer body being configured to generate an ultrasound wave; and a transducer cover that covers the radiation surface of the transducer body and serves as an acoustic matching layer, the transducer cover being made of resin. The radiation surface is of a convex spherical shape, and the transducer cover conforms to the shape of the radiation surface. The transducer cover has a thickness that is constant, is λ/8 or more and 3λ or less, and is outside a range of ±λ/40 of each of λ/8, λ/4, and λ/2, in which radiation energy changes rapidly, λ being a wavelength of a material of the transducer cover.

Dependencies are inferred from the claim text.