An ultrasonic sensor includes a vibration plate that includes a vibration portion and is formed of a resin; a wall portion that is provided on the vibration plate, surrounds the vibration portion and is formed of a resin; and a piezoelectric element that is provided in the vibration portion of the vibration plate. Accordingly, the wall portion surrounding the vibration portion can suppress a frequency variation of an ultrasonic wave output from the ultrasonic sensor and can deform the ultrasonic sensor into a shape corresponding to a surface of an object having various shapes.

A piezo-junction device may be provided. The piezo-junction device comprises a piezoelectric element comprising two electrodes and piezoelectric material in-between, and a semiconductor junction device adjacent to the piezoelectric element such that one of the two electrodes of the piezoelectric element is in contact with the semiconductor junction device connecting the semiconductor junction device and the piezoelectric element electrically in series. Thereby, the semiconductor junction device and the piezoelectric element are together positioned in a fixed mechanical clamp such that the piezoelectric element with an applied electrical field applies strain to the semiconductor junction device causing a change in Fermi levels of the semiconductor junction device.

The invention relates to a method for transferring at least one layer of material, comprising: producing first and second separating layers (108, 110), one against the other, on a first substrate (104); producing the layer to be transferred on the second separating layer (110); securing the layer to be transferred to a second substrate (106), forming a stack of different materials; and performing mechanical separation at the interface between the separating layers; in which the materials of the stack are such that the interface between the first and second separating layers has the weakest adhesion force, and the method comprises a step reducing an initial adhesion force of the interface between the first and second separating layers.

An ultrasound system, probe and method are provided. The ultrasound system includes a transducer with piezoelectric transducer elements polarized in a poling direction. A bipolar transmit circuit is configured to generate a transmit signal having first and second polarity segments. The first and second polarity segments have corresponding first and second peak amplitudes. A bias generator is configured to generate a bias signal in a direction of the poling direction. The bias signal is combined with the transmit signal to form a biased transmit signal that is shifted in the direction of the poling direction and still includes both of positive and negative voltages over a transmit cycle.

A piezoelectric sensor and a manufacturing method therefor, and a detection apparatus, which relate to the technical field of sensing. The piezoelectric sensor includes: an array substrate: a first capping layer located on the array substrate and including a first portion and a second portion, wherein the first portion covers the array substrate, a cavity is provided between the second portion and the array substrate, and the second portion is provided with a first opening: a first electrode located above the first capping layer and above the cavity, a piezoelectric thin film located on the first electrode, and a second electrode located on the piezoelectric thin film.

A piezoelectric element in which a first electrode, a piezoelectric layer, and a second electrode are stacked on a substrate is provided. The piezoelectric element is a piezoelectric element in which the first electrode, the piezoelectric layer, and the second electrode are stacked in order on the substrate and includes an orientation control layer that is provided between the piezoelectric layer and the first electrode and that controls orientation of the piezoelectric layer and a titanium layer that is provided between the first electrode and the orientation control layer and that contains at least Ti.

Provided is a vibration panel including an inner member, a first outer member, a second outer member, a piezoelectric actuator, an actuator bonding layer, and a filler. The inner member includes first and second main surfaces. The first outer member includes third and fourth main surfaces, the third main surface including a first region and a second region. The second outer member includes fifth and sixth main surfaces, the fifth main surface including a third region and a fourth region. The piezoelectric actuator causes vibration. The actuator bonding layer is disposed between the piezoelectric actuator and the second region and bonds the piezoelectric actuator to the second region. The filler fills a space between the second region and the fourth region and covers the piezoelectric actuator.

A piezoelectric laminate and a piezoelectric element have, on a substrate in the following order, a lower electrode layer and a piezoelectric film containing a perovskite-type oxide. The lower electrode layer includes a second layer arranged in a state of being in contact with the piezoelectric film and includes a first layer arranged on a side of the second layer from the substrate, where the first layer contains one or more of W, Mo, Nb, and Ta, as a main component, and the second layer contains Ir as a main component, where the thickness of the second layer is 50 nm or less.

A piezoelectric laminate and a piezoelectric element have, on a substrate in the following order, a lower electrode layer, and a piezoelectric film containing a perovskite-type oxide. The lower electrode layer includes a first layer arranged in a state of being in contact with the substrate and includes a second layer arranged in a state of being in contact with the piezoelectric film, the first layer contains Ti or TiW as a main component, the second layer is a uniaxial alignment film which contains Ir as a main component and in which the Ir is aligned in a (111) plane, and a half width at half maximum of an X-ray diffraction peak from the (111) plane is 0.3° or more.

A piezoelectric element includes a piezoelectric body including a piezoelectric material, and a first electrode and a second electrode provided on the piezoelectric body. The piezoelectric body includes a base and a plurality of drivers. The base includes a first main surface and a second main surface opposing each other. The plurality of drivers is arranged on the first main surface in such a way as to be separate from each other. Each of the plurality of drivers includes a third main surface contacting the first main surface and a fourth main surface opposing the third main surface. The base includes a plurality of first regions in which the plurality of drivers is provided and a second region provided between the first regions adjacent to each other. The base is curved.