Abstract: The present invention provides a small piezoelectric/electrostrictive ultrasonic linear motors which are installed in cell phones or PDAs, etc. to drive their camera lenses. In the present invention, a movable shaft (30) is coupled to a unimorph or bimorph, which is made by attaching a piezoelectric or electrostrictive substrate to an elastic body (20) (metal), so that a movable body (40) fitted over the movable shaft (30) is linearly moved along the movable shaft (30) by vibration of the piezoelectric or electrostrictive substrate, thus simplifying a manufacturing process, being easily practicable according to a basic principle, and having superior characteristics.

Abstract: A piezoelectric actuator for a liquid transporting apparatus includes a drive plate having a base portion which is arranged, on an upper surface of a vibration plate covering a pressure chamber; outside of an end portion in a longitudinal direction of the pressure chamber, and a drive portion which extends from the base portion along the longitudinal direction at least up to an area facing a substantially central portion of the pressure chamber; and a piezoelectric layer arranged on the upper surface of the vibration plate. The drive plate is fixed to the vibration plate at the base portion and at the area facing the substantially central portion of the pressure chamber. By increasing an amount of deformation of the piezoelectric actuator, a liquid transporting apparatus with improved drive efficiency is provided.

Abstract: A longitudinal vibrator-type transducer including: a head mass; a tail mass; a first piezo-resonator positioned between the head and tail masses; and, a coupling member coupling the head mass, tail mass and first piezo-resonator together; wherein, the head mass comprises a piezoceramic plate.

Abstract: A circular piezoelectric apparatus includes an electrode assembly which has an independent electrode located on a perimeter side wall of the circular piezoelectric apparatus and two separated electrodes located respectively at two opposite surfaces of the circular piezoelectric apparatus, a first structure located between the two separated electrodes that has a polarized direction coincided with a first axial direction directing from one electrode of the two separated electrodes to the other electrode thereof, and a second structure surrounding the first structure about the first axial direction and having a polarized direction coincided with a radial direction of the perimeter. One of the three electrodes is electrically connected a ground electrode to provide a voltage source for supplying an input voltage and a load through at least a conductive wire, and another electrode is electrically connected to an input electrode of the voltage source through another conductive wire.

Abstract: An actuator for a deformable optical component includes a stack of ferroelectric layers, a plurality of electrodes for applying a voltage across each layer; every other electrode extending to an associated first conductor path and interstitial electrodes extending to an associated second conductor path the first conductor path or receiving a first conductor lead, the second conductor path for receiving a second conductor lead to contact the respective electrodes.

Abstract: A piezoelectric resonator includes a piezoelectric layer having a first resonance frequency temperature coefficient of a first sign, a first and a second electrode, the piezoelectric layer being arranged between the first and second electrodes, and a compensation layer arranged between the first electrode and the piezoelectric layer, of a compensation material having a second resonance frequency temperature coefficient of a second sign opposite to the first one, wherein the compensation material is provided with a modification material to increase a conductivity of the compensation layer in a direction of the first electrode and the piezoelectric layer.

Abstract: A boundary acoustic wave device using SH boundary acoustic waves includes a first medium layer, a second medium layer stacked on the first medium layer, and an electrode including an interdigital electrode and reflectors. A sound absorbing layer is provided on the surface of the first medium layer and/or the second medium layer opposite the interface therebetween.

Abstract: The present invention relates to a crystal unit in which rectangular excitation electrodes are formed on two main surfaces of a rectangular crystal piece, an extracting electrode extends from at least one corner portion at each of two end portions from each of the excitation electrodes, and one of the corner portions of the crystal piece from which each extracting electrode extends is affixed by an electrically conductive adhesive to a step portion of the board, wherein a cutaway portion is provided in a corner portion of each of the excitation electrodes corresponding to one corner portion of the crystal piece, to increase the distance from the corner portion of the crystal piece, and the cutaway portion is formed as either a straight line or a curve. This provides a crystal unit in which contact between the excitation electrodes of the crystal piece and the electrically conductive adhesive is prevented, enabling reliable resonance.

Abstract: An electronic module, comprises: a circuit board; a piezoelectric device having a lid, the piezoelectric device being mounted on the circuit board; and an electronic component mounted on the circuit board. The electronic component includes an adjustment terminal for at least one of adjusting and inspecting an electrical characteristic thereof. The lid is electrically conducted to the adjustment terminal.

Abstract: A micro manipulator for electrode movement, a driving method thereof, and a brain signal measuring device using the same are provided.

Abstract: A vibration wave motor includes a housing, a rotor, a bearing member, a vibrator serving as an actuator and having a support shaft and a driving element, and a leaf spring having a pressing protrusion. The vibrator is slidably disposed in an opening of the housing along a rotation axis direction of the rotor, and a support shaft of the vibrator is rotatable. The vibrator is held while being urged by the leaf spring and being in contact with the rotor. The vibrator is excited to generate supersonic vibration so that the rotor is rotated. Since the vibrator is movably supported by the housing in the rotation axis direction and the vibrator is urged by the leaf spring and is in contact with a friction contact surface of the rotor, the vibrator is evenly in contact with the rotor in a direction perpendicular to the friction contact surface so as to provide superior driving conditions of the vibration wave motor.

Abstract: The present invention provides an angular velocity sensor and a method of fabrication thereof that facilitates the work of affixing a tuning-fork-type crystal element and adjusting the same, preventing waste caused by scrapping defective products and also encouraging miniaturization of components.