Abstract: A piezoelectric device includes a connecting section connecting a pair of beam sections adjacent to each other. The connecting section is connected to one of the pair of beam sections at a first end portion. The connecting section is connected to another of the pair of beam sections at a second end portion. The second end portion faces the first end portion in a direction in which the pair of beam sections are aligned. A second coupling portion is located along a first coupling portion. The connecting section includes only one first end portion. The connecting section includes only one second end portion. Each of the first end portion and the second end portion is closer to a tip end portion than to a fixed end portion of each of the pair of beam sections.

Abstract: A film capacitor 1 that includes: a capacitor element including a metallized film with a resin film and a metal layer on a surface of the resin film; an outer case that houses the capacitor element; and a filling resin that fills a space between the capacitor element and the outer case, wherein the outer case includes a resin composition that contains a liquid crystal polymer and an inorganic filler, and an amount of exposure of the inorganic filler from an outer surface of the outer case is 5% to 90%.

Abstract: In a cleaning device, a signal processing circuit determines that a foreign substance has adhered to a surface of a protection cover based on at least two pieces of information among a change amount of a resonant frequency when a vibration portion is driven at a first voltage, a change amount of a current value relating to an impedance detected by an impedance detector, and a temporal change of an image captured by an imaging portion, and cleans the surface of the protection cover by controlling the vibration portion in accordance with the determination.

Abstract: An inductor component includes an element body, a plurality of inductor wires, a plurality of columnar wires, and outer electrodes. The element body has a first principal surface. An axis parallel to the first principal surface is a first axis. Each inductor wire has a wire body, a first end pad connected to a first end of the wire body and having a large wire width relative to the wire body, and a second end pad connected to a second end of the wire body and having a large wire width relative to the wire body. Geometric centers of the first end pads of the inductor wires are on a single line that is parallel to the first axis. At least one of geometric centers of the second end pads of the inductor wires is not on a single line that is parallel to the first axis.

Abstract: A coil component includes a first wire wound to form a first layer in a direction from a first end toward a second end, and a second wire wound around the first wire to form a second layer in the direction from the first end toward the second end while turns of the second wire fit in recesses formed between adjacent turns of the first wire. The second wire subsequently turns back from the end positioned closer to the second end toward the first end and extends to an outer side of the second layer. Then, the second wire is wound around the second layer to form a third layer while turns of the second wire fit in recesses formed between adjacent turns of the second wire in the second layer. The second wire subsequently extends to the second layer on the outer side of the first layer.

Abstract: An inductor component includes a base body including an insulator, an inductor wire extending inside the base body, extended electrodes connected to the inductor wire, each of the extended electrodes having a portion exposed to outside of the base body, and outer electrodes connected to respective ones of the extended electrodes. The base body, inductor wire, and extended electrodes form a component body. When a first sectional area is defined as an area of a section of the component body taken along a plane parallel to the bottom surface of the component body at an arbitrary position and when a second sectional area is defined as an area of another section of the component body taken along another plane parallel to the bottom surface closer to the bottom surface from the arbitrary position, the second sectional area is equal to or greater than the first sectional area.

Abstract: An inductor component includes an element body, an inductor wire, and a plurality of columnar wires. The element body has a first principal surface. The inductor wire extends parallel to the first principal surface within the element body. Each columnar wire is connected to an end of the inductor wire and extends in a direction orthogonal to the first principal surface. The plurality of columnar wires are exposed from the element body at the first principal surface. A minimum distance from the first principal surface to the inductor wire is larger than or equal to 0.04 mm.

Abstract: A power amplifier circuit that includes an external input terminal and an external output terminal; a first power amplifier, a second power amplifier, a third power amplifier, and a fourth power amplifier; a transformer including an input-side coil and an output-side coil; and a first transmission line, the external input terminal being connected to an input terminal of the first and second power amplifiers, an output terminal of the first power amplifier is connected to an input terminal of the third and fourth power amplifiers, output terminals of the third and fourth power amplifiers being connected to a first and second end of the input-side coil respectively, the external output terminal being connected to a first end of the output-side coil, and an output terminal of the second power amplifier being connected to a second end of the output-side coil via the first transmission line.

Abstract: An inductor component includes an element body, a plurality of inductor wires, a plurality of columnar wires, and a plurality of outer electrodes. The plurality of inductor wires include a first inductor wire and a second inductor wire. The plurality of columnar wires include a plurality of first columnar wires and a plurality of second columnar wires. The plurality of outer electrodes include a plurality of first outer electrodes connected to the first columnar wires and a plurality of second outer electrodes connected to the second columnar wires. When viewed transparently in a direction orthogonal to a first principal surface, the first inductor wire has a portion overlapping the second outer electrodes.

Abstract: A passive component includes an inorganic substrate having a first main surface and a second main surface, which are opposed to each other, and contains a semiconductor material; and a passive element portion on the first main surface of the inorganic substrate so as to be in contact with the first main surface. When a cross section in a plane that passes through a center of gravity in a whole of the first main surface and is orthogonal to the first main surface is defined as a first cross section, in the first cross section, the inorganic substrate has a first side surface and a second side surface, which are connected with the first main surface and opposed to each other, and each of line roughness of the first side surface and line roughness of the second side surface is larger than line roughness of the first main surface.

Abstract: An inductor component includes an element body. The element body includes an inductor wire extending parallel to a first principal surface of the element body, columnar wires extending in a direction intersecting the first principal surface, and outer electrodes. Each inductor wire has a wire body, a first end pad connected to a first end of the wire body, and a second end pad connected to a second end of the wire body. The first and second end pads each have a large wire width relative to the wire body. The inductor wires include first and second inductor wires. When viewed transparently in a direction orthogonal to the first principal surface, at least one of a size and shape of the second end pad of the first inductor wire differs from at least one of a size and shape of the second end pad of the second inductor wire.

Abstract: A power amplifier circuit includes a power amplifier and an external power terminal that receives a power supply voltage from a power supply circuit. The power amplifier includes two amplifying elements and, a limiter, and an RC circuit. The amplifying elements respectively include first and second input terminals, first and second output terminals, and first and second power terminals. The limiter restricts the power supply voltage to a predetermined range and outputs the restricted power supply voltage. The RC circuit is connected in parallel with the limiter. The first input terminal is connected to an external input terminal. The first output terminal is connected to the second input terminal. The second output terminal is connected to an external output terminal. The first power terminal is connected to the external power terminal via the limiter. The second power terminal is connected to the external power terminal.

Abstract: An inductor component includes an element body. The element body includes an inductor wire extending parallel to a first principal surface of the element body, a plurality of columnar wires extending in a direction intersecting the first principal surface, and a plurality of outer electrodes exposed from the first principal surface. When viewed transparently in a direction orthogonal to the first principal surface, a first vector extending from a geometric center of at least one selected from a plurality of first-end columnar wires toward a geometric center of a first outer electrode connected to the first columnar wire is different from a second vector extending from a geometric center of at least one selected from a plurality of second-end columnar wires toward a geometric center of a second outer electrode connected to the second columnar wire.

Abstract: A dielectric block includes a bottom surface that includes a conductive ground member including an antenna ground surface inclined with respect to the bottom surface. A feed element is disposed at a distance from the antenna ground surface, and constitutes a patch antenna together with the antenna ground surface. A feed line is connected to a feed point of the feed element, and a dielectric member that supports the feed element with respect to the ground member. The ground member is exposed to the bottom surface, on both a lower side and a higher side of a contour line passing through an intersection point of a perpendicular line from the feed point to a virtual plane including the bottom surface and a plane including the antenna ground surface, using the bottom surface as a height reference.

Abstract: In a first balun of a radio-frequency circuit, a first end of a first coil is connected to an amplifier, and a second end of the first coil is connected to a ground. In the first balun, a first end of a second coil is connected to a first switch, and a second end of the second coil is connected to a second switch. In a second balun, a first end of a third coil is connected to the first end of the second coil via the first switch, and a second end of the third coil is connected to the second end of the second coil via the second switch. In the second balun, a first end of a fourth coil is connected to a filter, and a second end of the fourth coil is connected to the ground.

Abstract: A capacitor disposed inside a multilayer substrate that includes a conductive pattern on a surface thereof and an anode portion having a first conductive metal member and a porous portion disposed on a surface of the first conductive metal member, a cathode portion, and a dielectric layer disposed between the anode portion and the cathode portion. Moreover, the anode portion is led out to a surface side of the multilayer substrate by a connection electrode including an alloy layer containing a metal forming the first conductive metal member and a conductive layer disposed on the alloy layer, and in which the connection electrode is connected to the conductive pattern formed on the surface of the multilayer substrate.

Abstract: A solid electrolytic capacitor that includes a resin molding, a first external electrode, and a second external electrode. The resin molding includes a laminate of multiple capacitor elements, and a sealing resin sealing the laminate. The following are satisfied: t1<t2, t3<t4, t1<t3, and t4/t3<t2/t1, where t1 is the thickness of an inner portion of the cathode lead-out layer, the inner portion not being exposed at the second end surface; t2 is the thickness of an exposed portion of the cathode lead-out layer, the exposed portion being exposed at the second end surface; t3 is the thickness of an inner portion of the valve-action metal substrate, the inner portion not being exposed at the first end surface; and t4 is the thickness of an exposed portion of the valve-action metal substrate, the exposed portion being exposed at the first end surface.

Abstract: A first substrate have recesses respectively provided at corner portions of a bottom surface. Outer electrodes each have electrode body portion provided around an associated one of the recesses on the bottom surface. The electrode body portion has a protruding portion extending along a short-side ridge portion between the bottom surface and a side surface.

Abstract: A positive electrode active material includes positive electrode active material particles including a composite oxide with a hexagonal crystal structure. The composite oxide includes Li, Co, and at least one element M1 selected from the group consisting of Ni, Fe, Pb, Mg, Al, K, Na, Ca, Si, Ti, Sn, V, Ge, Ga, B, As, Zr, Mn and Cr, and the at least one element M1 is provided on a surface of the positive electrode active material particles. An atomic ratio of a total amount of the at least one element M1 to an amount of Co on the surface of the positive electrode active material particles is from 0.6 to 1.3.

Abstract: An inductor component includes a lamination of an insulating layer and a conductive layer. The insulating layer includes a base made of glass and inorganic particles dispersed in the base. Some of the inorganic particles partially project through the surface of the base into the conductive layer.