Abstract: A system and method provides a piezoelectric stack arrangement for reduced driving voltage while maintaining a driving level for active piezoelectric materials. A stack arrangement of d36 shear mode <011>single crystals of both air X-cut and Y-cut ±1:45° (±20°) arrangement are bonded with discrete conductive pillars to form a shear crystal stack. The bonding area between the neighboring crystal parts is minimized. The bonding pillars are positioned at less than a total surface are of the single crystal forming the stack. The stack fabrication is facilitated with a precision assembly system, where crystal parts are placed to desired locations on an assembly fixture for alignment following the preset operation steps. With the reduced clamping effect from bonding due to lower surface coverage of the discrete conductive pillars, such a piezoelectric d36 shear crystal stack exhibits a reduced driving voltage while maintaining a driving level and substantial and surprisingly improved performance.
May 6, 2015
Date of Patent:
August 13, 2019
Pengdi Han, Jian Tian, Stephen Dynan, Brandon Stone
Abstract: An ultrasonic actuator made of polarized piezoelectric material in the form of a single-layer or multilayer flat rectangular plate with two main faces, at least four lateral faces joining the main faces, and a thickness T, which is defined by the distance between the main faces in the direction of their surface normals, and wherein on both the one main face and the other opposite main face at least one layer including two triangular electrodes imposingly arranged and separated by a diagonal separating region, the electrodes on the one main face being offset relative to the electrodes on the other main face by 90°. The ultrasonic actuator is characterized in that on at least one of the lateral faces there are two mutually spaced friction elements designed to contact at least one element that is to be driven by the ultrasonic actuator.
Abstract: Disclosed is a surface acoustic wave device including a piezoelectric substrate, first and second bus bars formed on the piezoelectric substrate to be opposite each other, a plurality of first inter-digital electrodes that are electrically connected to the first bus bar and extend from the first bus bar toward the second bus bar, and a plurality of second inter-digital electrodes that are electrically connected to the second bus bar and extend from the second bus bar toward the first bus bar, in which the first inter-digital electrodes and the second inter-digital electrodes are alternately arranged.
Abstract: A multi-layer component (1) is specified, comprising a main body (2) with an external contact (3) arranged thereon, a further contact (5) for electrically contacting the multi-layer component (1), and a connecting element (4) for connecting the external contact (3) and the further contact (5), wherein the connecting element (4) is embodied in such a way that a decoupling of mechanical stresses that occur in the further contact (5) from the external contact (3) is brought about.
June 13, 2014
Date of Patent:
August 13, 2019
Martin Galler, Harald Kastl, Siegfried Fellner, Axel Pecina, Marion Ottlinger, Peter Gerletz, Robert Krumphals, Wolfgang Athenstaedt, Ivan Jagust, Zdravko Mijocevic, Zeljko Maric
Abstract: A piezoelectric thin film is formed by adding a donor element to lead zirconate titanate. In the piezoelectric thin film, a molar ratio of lead to a total sum of zirconium and titanium is 105% or higher, and, when positive and negative coercive electric fields in polarization and electric field hysteresis are referred to as Ec (+) and Ec (?), respectively, a value of |Ec (+) |/|Ec (?) | is 0.5 or more and 1.5 or less.
Abstract: A vibrator unit may be configured to vibrate a target material in a target channel and include a vibration element configured to vibrate in response to an external electrical signal having a predetermined frequency. A resonance frequency of the vibration element may be different from the predetermined frequency of the electrical signal. A vibrator unit may include a vibration transmission member in contact with the first member including the target channel in interior; and a vibration element that is in contact with the vibration transmission member. A mode-1 natural frequency of the vibration transmission member may be different from a resonance frequency of the vibration element.
Abstract: A physical quantity detection device includes a semiconductor element and a physical quantity detection vibrator element a portion of which overlaps the semiconductor element in a plan view of the semiconductor element. The physical quantity detection vibrator element includes a drive portion including a drive electrode, and a detection portion. At least a partial region of the drive electrode does not overlap the semiconductor element in the plan view of the semiconductor element.
Abstract: A micro-electrical-mechanical system (MEMS) guided wave device includes a single crystal piezoelectric layer and at least one guided wave confinement structure configured to confine a laterally excited wave in the single crystal piezoelectric layer. A bonded interface is provided between the single crystal piezoelectric layer and at least one underlying layer. A multi-frequency device includes first and second groups of electrodes arranged on or in different thickness regions of a single crystal piezoelectric layer, with at least one guided wave confinement structure. Segments of a segmented piezoelectric layer and a segmented layer of electrodes are substantially registered in a device including at least one guided wave confinement structure.
Abstract: A piezoelectric element which includes a vibrating film, a piezoelectric body disposed on one surface of the vibrating film, and a horizontal electrode structure in which electrodes are disposed at a predetermined gap therebetween on the piezoelectric body. The vibrating film includes a recess portion in a portion corresponding to the predetermined gap in plan view.
Abstract: Disclosed is a piezoelectric oxide single crystal substrate used in a surface acoustic wave device and the like which undergoes scarce warpage and is not easy to break or get scratched and has good a temperature characteristic. A piezoelectric oxide single crystal substrate has a concentration profile such that the Li concentration differs between the substrate surface and a middle part of the substrate; in particular, the concentration profile is such that, in the direction of the thickness of the substrate, the closer the measuring point is to the substrate surface, the higher becomes the Li concentration, and the closer the measuring point is to the thickness-wisely middle part of the substrate, the lower becomes the Li concentration.
Abstract: A base end of a flexible plate-like structure body (111) having a first attribute is fixed to a pedestal (310) and a leading end thereof is connected to a connector between different attributes (112). Base end of a flexible plate-like structure body (113, 114) having a second attribute is connected to the connector between different attributes (112) and leading end thereof is given as free ends. Weight body (211, 212, 213) is connected to the lower surface of the connector between different attributes (112) and the leading-end lower surface of the plate-like structure body (113, 114) having the second attribute. When vibration energy is applied to the pedestal (310), the weight body (211, 212, 213) undergoes vibration, resulting in deformation of each of the plate-like structure bodies (111, 113, 114). The deformation energy is taken out by a charge generating element (400) such as a piezoelectric element to generate electric power.
Abstract: A piezoelectronic switch device for radio frequency (RF) applications includes a piezoelectric (PE) material layer and a piezoresistive (PR) material layer separated from one another by at least one electrode, wherein an electrical resistance of the PR material layer is dependent upon an applied voltage across the PE material layer by way of an applied pressure to the PR material layer by the PE material layer; and a conductive, high yield material (C-HYM) comprising a housing that surrounds the PE material layer, the PR material layer and the at least one electrode, the C-HYM configured to mechanically transmit a displacement of the PE material layer to the PR material layer such that applied voltage across the PE material layer causes an expansion thereof and an increase the applied pressure to the PR material layer, thereby causing a decrease in the electrical resistance of the PR material layer.
May 25, 2016
Date of Patent:
July 16, 2019
INTERNATIONAL BUSINESS MACHINES CORPORATION
Matthew W. Copel, Bruce G. Elmegreen, Glenn J. Martyna, Dennis M. Newns, Thomas M. Shaw, Paul M. Solomon
Abstract: An electronic component housing package includes a base having a first principal face provided with a mounting section for mounting an electronic component; a frame having a second principal face, the frame being disposed on the base so as to surround the mounting section; a frame-shaped metallized layer disposed on the second principal face of the frame; and a side-surface conductor disposed on an inner side surface of the frame, the side-surface conductor connecting the frame-shaped metallized layer and a relay conductor formed on the first principal face, the side-surface conductor being covered with an insulating film from one end to the other end in a width direction of the side-surface conductor.
Abstract: A piezoelectric device includes a piezoelectric element including a first electrode, a second electrode, and a piezoelectric layer provided between the first electrode and the second electrode, and a driving system that drives the piezoelectric element by applying voltage to the first electrode and the second electrode, in which the driving system drives the piezoelectric element at a maximum voltage that is lower than a voltage at which a tunnel current or a Poole-Frenkel current starts to be generated in the piezoelectric element.
Abstract: A lead-free piezoelectric ceramic composition including an alkali niobate/tantalate perovskite oxide main phase having piezoelectric properties and a different metal oxide. The mole ratio (Na/K) between Na (sodium) and K (potassium) in the main phase is 0.40<(Na/K)<3.0. The main phase has a crystal structure in which (i) first spots corresponding to a primitive lattice period and (ii) second spots corresponding to the lattice period two times the primitive lattice period and being weaker than the first spots appear in an electron beam diffraction image entering from the <100> direction with the main phase represented as a pseudo-cubic crystal system. Also, the area ratio of a crystal phase reflecting the second spots in the main phase is 33% or less, and the maximum grain size of crystals reflecting the second spots in the main phase is 25 nm or less.
Abstract: A micro-electrical-mechanical system (MEMS) guided wave device includes a piezoelectric layer including multiple thinned regions of different thicknesses each bounding in part a different recess, different groups of electrodes on or adjacent to different thinned regions and arranged for transduction of lateral acoustic waves of different wavelengths in the different thinned regions, and at least one bonded interface between the piezoelectric layer and a substrate. Optionally, a buffer layer may be intermediately bonded between the piezoelectric layer and the substrate. Methods of producing such devices include locally thinning a piezoelectric layer to define multiple recesses, bonding the piezoelectric layer on or over a substrate layer to cause the recesses to be bounded in part by either the substrate or an optional buffer layer, and defining multiple groups of electrodes on or over the different thinned regions.
Abstract: An electronic device includes a base material, a first metal film disposed on the base material and containing nitrogen and chromium, and a second metal film disposed on the first metal film and containing gold. In the first metal film, the number of nitrogen atoms may be between 20% to 100% of the number of chromium atoms. Further, the distribution of nitrogen atoms in the first metal film is larger in a third region sandwiched between a first region on the base material side of the first metal film and a second region on the second metal film side than in the first region and in the second region.
Abstract: There is provided a bonded substrate including: a quartz substrate; and a piezoelectric substrate which is bonded on the quartz substrate and on which a surface acoustic wave propagates, wherein the quartz substrate and the piezoelectric substrate are bonded at a bonding interface through covalent bonding, and a surface acoustic wave element having a higher phase velocity and a higher electromechanical coupling factor than conventional one is obtained by disposing an interdigital electrode on a principal surface of the piezoelectric substrate.
February 3, 2017
Date of Patent:
July 2, 2019
THE JAPAN STEEL WORKS, LTD., WASEDA UNIVERSITY, UNIVERSITY OF YAMANASHI
Abstract: A lead-free piezoelectric ceramic composition including an alkali niobate/tantalate perovskite oxide main phase having piezoelectric properties and a different metal oxide subphase. The mole ratio (Na/K) between Na (sodium) and K (potassium) in the main phase assumes a value in a range represented by 0.40<(Na/K)<3.0. The main phase has a crystal structure in which (i) first spots corresponding to a primitive lattice period and (ii) second spots corresponding to the lattice period two times the primitive lattice period and being weaker than the first spots appear in an electron beam diffraction image entering from the <100> direction with the main phase represented as a pseudo-cubic crystal system.
Abstract: According to one embodiment, an ultrasonic probe includes piezoelectric elements, a flexible printed circuit, and one of an air gap layer and a resin layer. The piezoelectric elements transmit and receive ultrasonic waves. The flexible printed circuit located on a rear surface side of the piezoelectric elements and electrically connected to the piezoelectric elements. The air gap layer locates on a rear surface side of the flexible printed circuit and has air gaps. The resin layer is obtained by filling the air gap layer with a resin and locates on the rear surface side of the flexible printed circuit.