Abstract: An ultrasonic irradiation apparatus includes an ultrasonic resonator capable of generating ultrasound, a driving unit configured to drive the ultrasonic resonator, a case holding the ultrasonic resonator and the driving unit, an acoustic matching layer provided between the ultrasonic resonator and the case, and an acoustic diffusion layer made of an ultrasound diffusing material configured to diffuse high intensity ultrasound emitted from the ultrasonic resonator and convert the high intensity ultrasound into low intensity ultrasound with low intensity per unit area and radiate in a large area. The ultrasonic resonator is a piezoelectric resonator, the ultrasound diffusing material of the acoustic diffusion layer is made of a metal material of an acoustic impedance of at least 40, and the acoustic diffusion layer is provided in at least one of inside of the acoustic matching layer, inside of the case, and outside of the case.

Abstract: According to embodiment, a piezoelectric transducer includes a polarized single crystal piezoelectric body comprising a lead complex perovskite compound containing niobium oxide and at least one of magnesium oxide and indium oxide and including a first plane whose crystal orientation is [100] and a second plane which faces the first plane and whose crystal orientation is [100], and first electrode provided on the first plane side of the body and a second electrode provided on the second plane side of the body. A ratio of a second FWHM of diffracted X-rays at the Miller index (400) of the body to a first FWHM of diffracted X-rays at the miller index (400) of the body which is unpolarized or has undergone depolarization processing is not less than 0.22 and not more than 0.4.

Abstract: According to one embodiment, an ultrasonic probe includes a single crystal piezoelectric body with first and second planes facing each other and having a crystal orientation of [100], first and second electrodes on the respective first and second plane of the piezoelectric body, an acoustic matching layer on the first electrode, and a backing member under the second electrode, wherein the piezoelectric body is polarized along a first direction passing through the piezoelectric body and first and second electrodes, a fracture surface of the piezoelectric body that includes the first direction has a multilayer shape along one of the first and second electrodes, and a thickness of each layer of the multilayer shape is not less than 0.5 ?m and not more than 5 ?m.

Abstract: According to embodiment, a piezoelectric transducer includes a polarized single crystal piezoelectric body comprising a lead complex perovskite compound containing niobium oxide and at least one of magnesium oxide and indium oxide and including a first plane whose crystal orientation is [100] and a second plane which faces the first plane and whose crystal orientation is [100], and first electrode provided on the first plane side of the body and a second electrode provided on the second plane side of the body. A ratio of a second FWHM of diffracted X-rays at the Miller index (400) of the body to a first FWHM of diffracted X-rays at the miller index (400) of the body which is unpolarized or has undergone depolarization processing is not less than 0.22 and not more than 0.4.

Abstract: According to one embodiment, an ultrasonic probe includes a single crystal piezoelectric body with first and second planes facing each other and having a crystal orientation of [100], first and second electrodes on the respective first and second plane of the piezoelectric body, an acoustic matching layer on the first electrode, and a backing member under the second electrode, wherein the piezoelectric body is polarized along a first direction passing through the piezoelectric body and first and second electrodes, a fracture surface of the piezoelectric body that includes the first direction has a multilayer shape along one of the first and second electrodes, and a thickness of each layer of the multilayer shape is not less than 0.5 ?m and not more than 5 ?m.

Abstract: Provided is an acoustic lens composition which comprises 40 wt % or more of silicone rubber and 15 to 60 wt % of a zinc oxide powder, suppresses ultrasonic attenuation, and has superior molding properties.

Abstract: A two-dimensional array ultrasonic probe includes a plurality of channels arranged apart from each other in a two-dimensional direction, each channel including a laminated piezoelectric element and an acoustic matching layer formed on the laminated piezoelectric element, the laminated piezoelectric element including a plurality of first and second electrodes arranged alternately within a piezoelectric body in a thickness direction of the piezoelectric body such that the side edges alone of the first electrodes and the second electrodes are exposed to the two mutually facing side surfaces of the piezoelectric body, respectively. The laminated piezoelectric element is mounted to a backing member. A signal side electrode and a ground electrode are formed to respectively extend from both side surface of the piezoelectric body to reach the backing member and are connected to the side edges of the first and second electrodes exposed to the side surface of piezoelectric body, respectively.

Abstract: A two-dimensional array ultrasonic probe is provided with a two-dimensional ultrasonic array and a surface protection layer provided on the array. The two-dimensional ultrasonic array arranges a plurality of piezoelectric vibration elements two-dimensionally. The surface protection layer is made essentially of polybutadiene series rubber. The polybutadiene series rubber is synthesized from 100 parts by weight of polybutadiene and 1 to 5 parts by weight of glycerin.

Abstract: Disclosed is an acoustic backing composition comprising an ethylene-vinyl acetate copolymer containing 20 to 80% by weight of the vinyl acetate units and a filler contained in the ethylene-vinyl acetate copolymer.

Abstract: A two-dimensional array ultrasonic probe is provided with a two-dimensional ultrasonic array and a surface protection layer provided on the array. The two-dimensional ultrasonic array arranges a plurality of piezoelectric vibration elements two-dimensionally. The surface protection layer is made essentially of polybutadiene series rubber. The polybutadiene series rubber is synthesized from 100 parts by weight of polybutadiene and 1 to 5 parts by weight of glycerin.

Abstract: The present invention relates to an ultrasonic probe including a piezoelectric element, a first acoustic matching layer provided on the front face of the piezoelectric element and formed of a solid inorganic material, and a second acoustic matching layer provided on the first acoustic matching layer and formed of a mixture of an organic resin and 10 to 30% by volume of oxide powder with a density of 6.5 g/cm3 or more.

Abstract: Provided is an acoustic lens composition which comprises 40 wt % or more of silicone rubber and 15 to 60 wt % of a zinc oxide powder, suppresses ultrasonic attenuation, and has superior molding properties.

Abstract: Disclosed is an acoustic backing composition comprising an ethylene-vinyl acetate copolymer containing 20 to 80% by weight of the vinyl acetate units and a filler contained in the ethylene-vinyl acetate copolymer.

Abstract: Disclosed is an acoustic backing composition comprising an ethylene-vinyl acetate copolymer containing 20 to 80% by weight of the vinyl acetate units and a filler contained in the ethylene-vinyl acetate copolymer.

Abstract: An ultrasonic probe comprises an acoustic backing layer made of a composite resin material including a resin and a plurality of bonded fibers contained the resin, each of the bonded fibers being formed of a plurality of zinc oxide fibers bonded to each other at one edge portions and extending in different directions in the other edge portions, the composite resin material exhibiting an acoustic impedance of 1.3 to 6 MRayls at 25° C., a plurality of channels arranged on the acoustic backing layer with space, each channel having a piezoelectric element and an acoustic matching layer formed on the piezoelectric element, and an acoustic lens formed to cover at least the surface of the acoustic matching layer of each channel.

Abstract: A two-dimensional array ultrasonic probe includes a plurality of channels arranged apart from each other in a two-dimensional direction, each channel including a laminated piezoelectric element and an acoustic matching layer formed on the laminated piezoelectric element, the laminated piezoelectric element including a plurality of first and second electrodes arranged alternately within a piezoelectric body in a thickness direction of the piezoelectric body such that the side edges alone of the first electrodes and the second electrodes are exposed to the two mutually facing side surfaces of the piezoelectric body, respectively. The laminated piezoelectric element is mounted to a backing member. A signal side electrode and a ground electrode are formed to respectively extend from both side surface of the piezoelectric body to reach the backing member and are connected to the side edges of the first and second electrodes exposed to the side surface of piezoelectric body, respectively.

Abstract: Disclosed is an array ultrasonic probe, including a plurality of channels arranged with spaces, each channel having a piezoelectric element and a laminated acoustic matching layer structure formed of at least three layers and arranged on the piezoelectric element, a backing on which the piezoelectric element of each channel is mounted and having trenches in which are formed at places corresponding to the spaces, and an acoustic lens formed to cover at least the surface of the uppermost acoustic matching layer of each channel, wherein the uppermost acoustic matching layer comprises a silicone resin-containing mixture having a Shore hardness D not lower than 40 at 25° C., and exhibits an acoustic impedance of 1.8 to 2.5 MRayls at 25° C.

Abstract: An ultrasonic probe is characterized in that a piezoelectric member 111 formed of solution-based single-crystal containing at least plumbum titanate is sandwiched between resin layers 113 and 115 having smaller acoustic impedance than the piezoelectric member and having conductivity, so processing errors are prevented from occurring during cutting and the resin layers can be used as acoustic layers or electrodes.

Abstract: An array-type ultrasonic probe includes a member, a plurality of channels arranged on the member with spaces and each having a piezoelectric element and at least three acoustic matching layers formed on the piezoelectric element, and an acoustic lens formed in a manner to cover at least the surface of the uppermost acoustic matching layer of each channel. The uppermost acoustic matching layer contains a denatured polyether resin and an another resin having an acoustic impedance higher than that of the denatured polyether resin, the uppermost acoustic matching layer having an acoustic impedance of 1.6 to 2.5 MRayls at 25° C.

Abstract: A convex ultrasonic probe includes a backing member including a support which has a convexly curved surface and a thermal conductivity of 70 W/m·K or more, and an acoustic absorbent layer having a uniform overall thickness which is fixed on the convexly curved surface of the support, a plurality of channels arranged with spaces on the backing member and each having a piezoelectric element and an acoustic matching layer formed on the piezoelectric element, and an acoustic lens formed on the acoustic matching layer of each of the channels. A relation in which t1/t2=6 to 20 is satisfied, where t1 is the thickness of the acoustic absorbent layer and t2 is the thickness of the piezoelectric element.