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 electrical device that includes a substrate; a 3D capacitor including a capacitor dielectric region of a dielectric material, a capacitor electrode region of a conductive material, the capacitor dielectric region and the capacitor electrode region being arranged at least partially inside a cavity extending in the substrate from a top face of the substrate; and a surrounding through opening in the substrate and which surrounds a surrounded substrate region, the 3D capacitor being outside of the surrounded substrate region, the surrounding through opening extending from the top face to a bottom face of the substrate, wherein inside the surrounding through opening a surrounding dielectric region of the dielectric material and a surrounding conductive region of the conductive material are arranged.

Abstract: A wireless communication device transmits and receives a high-frequency signal having a first frequency as a carrier frequency. The device includes a base material made of paper, an antenna pattern of an Sn alloy formed on the base material, and an RFIC element connected electrically to the antenna pattern. Moreover, the antenna pattern including a thin wire part and a thick wire part that differ in wire width from each other.

Abstract: A multilayer ceramic capacitor includes a stacked body and external electrodes. The stacked body includes stacked dielectric layers and internal electrodes. The external electrodes are disposed on lateral surfaces of the stacked body and are connected to the internal electrodes. A ratio of min to max is not less than about 36% and not more than about 90%, where A1, A2, A3, and A4 respectively denote the surface areas of first, second, third, and fourth external electrodes that are located on the first or second main surface of the stacked body.

Abstract: A bipolar transistor includes a collector layer, a base layer, and an emitter layer that are formed in this order on a compound semiconductor substrate. The emitter layer is disposed inside an edge of the base layer in plan view. A base electrode is disposed on partial regions of the emitter layer and the base layer so as to extend from an inside of the emitter layer to an outside of the base layer in plan view. An insulating film is disposed between the base electrode and a portion of the base layer, with the portion not overlapping the emitter layer. An alloy layer extends from the base electrode through the emitter layer in a thickness direction and reaches the base layer. The alloy layer contains at least one element constituting the base electrode and elements constituting the emitter layer and the base layer.

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: 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 resonator is provided that includes a vibration part and a mass addition portion. The vibration part includes a piezoelectric film, an upper electrode, and a lower electrode. The upper electrode and the lower electrode are disposed on opposite sides with the piezoelectric film therebetween. The amount of displacement of the vibration part is greater in a region corresponding to at least part of the mass addition portion than in any other region. The mass addition portion has an inclined surface that slopes in such a manner that the mass addition portion has end regions and a central region thinner than at least one of the end regions when the vibration part is viewed in a plan view.

Abstract: An electrical connector is capable of performing stable inspection without affecting an extraction force of a connector engagement portion. The electrical connector includes a housing having an electrical insulation property, an internal terminal held by the housing, and an external terminal held by the housing, with the external terminal to be electrically connected to a ground. The external terminal includes a fitting portion having a first engagement wall portion at one side and having a second engagement wall portion at the other side in a plan view from a connector insertion/extraction direction. A first engagement portion is formed at the first engagement wall portion, and a second engagement portion is formed at the second engagement wall portion.

Abstract: An RF signal transmitting/receiving circuit includes: at least one power amplifier circuit that amplifies and outputs an RF transmission signal; duplexers each including a transmission filter that passes the RF transmission signal amplified by the power amplifier circuit, and a reception filter that passes an RF reception signal; at least one distribution circuit that divides the RF transmission signal input to the power amplifier circuit and outputs a first signal; a signal output circuit that outputs, based on the first signal, in at least one transmission path among transmission paths of a plurality of the RF reception signals, at least one second signal that has substantially a same delay amount, an inverted phase, and substantially same power as the RF transmission signal mixed in the RF reception signal; and coupling circuits that couple the second signal to the RF reception signal transmitted in the at least one transmission path.

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: 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: 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: 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: 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: 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: 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: 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, 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: 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.