Abstract: A manufacturing method of ceramic powder includes mixing a barium carbonate having a specific surface are of 15 m2/g or more, a titanium dioxide having a specific surface area of 20 m2/g or more, a first compound of a donor element having a larger valence than Ti, and a second compound of an acceptor element having a smaller valence than Ti and having a larger ion radium than Ti and the donor element, and synthesizing barium titanate powder by calcining the barium carbonate, the titanium dioxide, the first compound and the second compound until a specific surface area of the barium titanate powder becomes 4 m2/g or more and 25 m2/g or less.

Abstract: A coil component includes: a laminate including a magnetic portion and an insulator, the insulator having a higher insulation quality than the magnetic portion; a first external electrode; a second external electrode; and a coil conductor provided in the laminate, wherein the coil conductor includes a plurality of conductor patterns each extending along a planar direction perpendicular to the coil axis, the plurality of conductor patterns being separated from each other in the direction of the coil axis, the plurality of conductor patterns include a first conductor pattern and a second conductor pattern, the first conductor pattern contacting with the first external electrode, the second conductor pattern contacting with the second external electrode, and in the planar direction, the insulator is provided between the first conductor pattern and the second external electrode and between the second conductor pattern and the first external electrode.

Abstract: A multi-layer ceramic capacitor includes: a multi-layer unit including ceramic layers laminated in a first direction and electrodes disposed between the ceramic layers, positions of end portions of the electrodes falling within a range of 0.5 ?m in a second direction; and side margins each containing manganese or magnesium and silicon and facing each other in the second direction. When each margin is equally divided into an inner region and an outer region, a total concentration of manganese and magnesium in the outer region is higher than a total concentration of manganese and magnesium in the inner region and higher than a total concentration of manganese and magnesium in the ceramic layers, and a concentration of silicon in the inner region is not less than a concentration of silicon in the outer region and higher than a concentration of silicon in the ceramic layers.

Abstract: A gas detection device according to an embodiment of the present invention includes a casing and a plurality of sensor elements. The casing includes a gas introducing port, a first chamber that communicates with the introducing port, a second chamber that communicates with the first chamber, a flow limiter that limits a flow of gas from the first chamber to the second chamber, and a gas exhausting portion that communicates with the second chamber. The plurality of sensor elements are disposed within the second chamber and have different detection sensitivities depending on a gas type.

Abstract: A multilayer ceramic electronic component includes a ceramic body including ceramic layers stacked in a first axis direction and internal electrodes disposed between the plurality of ceramic layers and alternately led out to respective sides along a second axis direction orthogonal to the first axis direction, and external electrodes connected to the internal electrodes and opposed to each other in the second axis direction across the ceramic body. The internal electrodes include first and second peripheral internal electrodes collectively disposed in first and second peripheral portions at respective outer sides in the first axis direction, respectively and central internal electrodes collectively disposed closer to a center in the first axis direction than the first and second peripheral internal electrodes, and each of the first and second peripheral internal electrodes has a higher content ratio of ceramic particles than each of the central internal electrodes.

Abstract: A multilayer ceramic electronic component includes a ceramic body, which includes an electrode-stacking portion in which internal electrodes are stacked, and cover portions facing each other in a first axis direction across the electrode-stacking portion, and external electrodes each including a covering portion that covers the ceramic body from a second axis direction, and an extending portion that extends over the cover portions along the second axis direction. The ceramic body includes crystal grains of ceramic and segregated small grains located between the crystal grains. In a cross section of an end section located between the extending portion of the cover portion and the electrode-stacking portion, the number of the segregated small grains having a grain size of 0.5% or greater and 10% or less of an average grain size of the crystal grains is 40% or greater and 95% or less of the number of the crystal grains.

Abstract: A multilayer ceramic capacitor includes a ceramic body including a first internal electrode and a second internal electrode facing the first internal electrode, a pair of first external electrodes arranged on end surfaces of the ceramic body, respectively, connected to the first internal electrode; anda pair of second external electrodes arranged on side surfaces of the ceramic body, respectively, connected to the second internal electrode, wherein at least one of a first electrode main body portion and a second electrode main body portion has a first current regulating portion that is a cutout portion spaced apart from an outer edge of the corresponding first or second electrode main body portion and having a shape in which a ratio of a maximum longitudinal dimension to a maximum transverse dimension is greater than 1.

Abstract: An electronic device includes a support substrate, a piezoelectric layer that is provided on the support substrate, a functional element including an electrode provided on a surface of the piezoelectric layer, a metallic frame body that is provided on the support substrate so as to surround the piezoelectric layer and the functional element in a plan view, a metallic lid that is provided on the frame body so as to form a space between the lid and the support substrate, and seals the functional element into the space, and a columnar body that is provided between the support substrate and the lid in the space.

Abstract: A ceramic electronic device includes a multilayer chip including a multilayer structure, a first cover layer and a second cover layer and having a parallelepiped shape, the multilayer structure having a structure in which each of a plurality of dielectric layers and each of a plurality of internal electrode layers are alternately stacked and are alternately exposed to a first end face and a second end face of the multilayer chip, the first end face being opposite to the second end face, the first cover layer being provided on an upper face of the multilayer structure in a stacking direction, the second cover layer being provided on a lower face of the multilayer structure, a first external electrode formed on the first end face, and a second external electrode formed on the second end face. In this structure, a relationship of 0.20?R1/?{square root over (?)}(P12?C12)?0.80 is satisfied.

Abstract: A coil component includes: a core part including: a winding shaft; and a flange part provided on an axial-direction end of the winding shaft, which has an exterior face on the opposite side of the winding shaft, first and second side faces, and first and second groove parts provided on the exterior face and having a cut-out part on each the first and second side faces; a coil part including: a winding part of a conductor wound around the winding shaft; and two lead parts of the conductor led out from the winding part; and two terminal parts formed on the exterior face of the flange part; wherein the two lead parts are led in from the cut-out parts on the first and second side faces and fitted inside the groove parts, respectively, on the exterior face, and included in the pair of terminal parts, respectively.

Abstract: An acoustic wave device includes a first piezoelectric layer that is a rotated Y-cut lithium tantalate substrate and has a first thickness, a second piezoelectric layer that is a rotated Y-cut lithium niobate substrate, is stacked on the first piezoelectric layer, has a second thickness that is less than the first thickness, and has a spontaneous polarization direction that is substantially opposite to a spontaneous polarization direction of the first piezoelectric layer, a first electrode provided on an opposite surface of the first piezoelectric layer from the second piezoelectric layer, and a second electrode that is provided on an opposite surface of the second piezoelectric layer from the first piezoelectric layer, at least a part of the first piezoelectric layer and at least a part of the second piezoelectric layer being interposed between the first electrode and the second electrode.

Abstract: An inductor includes a magnetic base body including soft magnetic metal particles containing iron, first and second external electrodes provided on the magnetic base body, and an internal conductor provided in the magnetic base body, with one end thereof electrically connected to the first external electrode and the other end thereof electrically connected to the second external electrode, the internal conductor extending linearly from the first external electrode to the second external electrode in plan view. The magnetic base body is configured so that a peak intensity ratio is 2 or more between a peak intensity of a first peak and a peak intensity of a second peak in a Raman spectrum obtained by using an excitation laser with a wavelength of 488 nm. The first peak is around a wave number of 712 cm?1, and the second peak is around a wave number of 1320 cm?1.

Abstract: A multiplexer includes: a multilayered body including dielectric layers stacked and having first and second surfaces; a common terminal, a first terminal, a second terminal, and a ground terminal disposed on a surface of the multilayered body; a first filter disposed in the multilayered body and electrically connected between the common terminal and the first terminal; a second filter including: a first inductor electrically connected between the common terminal and the second terminal; and a second inductor connected in series with the first inductor between the first inductor and the second terminal, the second inductor at least partially overlapping with the first inductor, a capacitance between a first end of the second inductor electrically closer to the common terminal and the ground terminal being larger than a capacitance between a first end of the first inductor electrically closer to the common terminal and the ground terminal.

Abstract: An acoustic wave device includes: a substrate; a lower electrode, an air gap being interposed between the lower electrode and the substrate; a piezoelectric film located on the lower electrode; and an upper electrode located on the piezoelectric film such that a resonance region where at least a part of the piezoelectric film is interposed between the upper electrode and the lower electrode is formed and the resonance region overlaps with the air gap in plan view, wherein a surface facing the substrate across the air gap of the lower electrode in a center region of the resonance region is positioned lower than a surface closer to the piezoelectric film of the substrate in an outside of the air gap in plan view.

Abstract: A multilayer piezoelectric element includes a ceramic body formed by a piezoelectric ceramic, and having first and second end face facing a longitudinal direction, first and second principal faces facing a thickness direction perpendicular to the longitudinal direction. A pair of external electrodes cover the first and second end faces, extend from the first and second end faces onto the first principal face via ridge parts connecting the end faces with the principal faces, and project in the thickness direction on the first principal face. Multiple internal electrodes are stacked inside the ceramic body and are connected alternately to the pair of external electrodes along the thickness direction. A surface electrode is provided on at least one of the first and second principal faces, and connected to the external electrode different from the one to which the internal electrode adjacent in the thickness direction is connected.

Abstract: A multi-layer ceramic capacitor includes a ceramic multi-layer chip, a side margin, and a bonding portion. The ceramic multi-layer chip includes a capacitance forming unit including internal electrodes, the internal electrodes being laminated in a first direction and including a base metal material as a main component, positions of end portions of the internal electrodes in a second direction orthogonal to the first direction being aligned with one another within a range of 0.5 ?m in the second direction, and a cover that is disposed outside the capacitance forming unit in the first direction and includes ceramics as a main component. The side margin includes ceramics as a main component and covers the ceramic multi-layer chip in the second direction. The bonding portion is disposed on a bonding surface and includes an oxide including the base metal material, the bonding surface being bonded to the side margin on the cover.

Abstract: A multilayer ceramic capacitor includes a ceramic body including an electrode-stacked portion having first and second internal electrodes that are alternately stacked along a first axis direction, wherein the first internal electrodes include a first inner-layer internal electrode and a first outer-layer internal electrode that is absent at and adjacent to a position corresponding to at least one of four corners of the first inner-layer internal electrode, the second internal electrodes include a second inner-layer internal electrode and a second outer-layer internal electrode that is absent at and adjacent to a position corresponding to at least one of four corners of the second inner-layer internal electrode, and the electrode-stacked portion includes a pair of outer layer portions where the first and second outer-layer internal electrodes are stacked, and an inner layer portion positioned between the outer layer portions and where the first and second inner-layer internal electrodes are stacked.

Abstract: A multilayer ceramic capacitor includes a ceramic body including a multilayer body and a pair of side margin portions, the multilayer body including ceramic layers stacked in a direction of a first axis, internal electrodes interposed between the ceramic layers, a pair of end surfaces perpendicular to a second axis orthogonal to the first axis, and a pair of side surfaces perpendicular to a third axis orthogonal to the first axis and the second axis, the pair of side margin portions covering the pair of side surfaces, and a pair of external electrodes covering the pair of end surfaces, respectively, wherein each of the internal electrodes includes a lead-out portion led out to either one of the pair of end surfaces of the multilayer body and a narrow-width portion having a width in a direction of the third axis smaller than that of the lead-out portion.

Abstract: A multilayer ceramic capacitor includes a ceramic body including a plurality of first and second internal electrodes alternately laminated via a plurality of ceramic layers in the direction of the first axis; and first and second external electrodes covering the end surfaces of the ceramic body, respectively, wherein the plurality of first and second internal electrodes respectively include a plurality of first and second standard internal electrodes having a common configuration, respectively, and a plurality of first and second special internal electrode that have a configuration different from the plurality of first standard internal electrodes, and wherein the plurality of first and second special internal electrodes are successively laminated in a section of the ceramic body that is closer to one side of one of the first and second main surfaces than a center in the direction of the first axis.

Abstract: An odor measurement device includes a sensor having an adsorption film that adsorbs an odorant and outputting a signal corresponding to adsorption of the odorant, a first pump that supplies a first gas containing an odorant to a housing chamber that houses the sensor, a second pump that supplies a second gas for desorbing the odorant from the adsorption film to the housing chamber, and a control device including a determination unit that measures the odorant based on information on an output signal of the sensor in a desorption process in which the odorant is desorbed from the adsorption film, and a control unit that sequentially executes a first mode in which the first gas is supplied to the housing chamber and a second mode in which the second gas is supplied to the housing chamber and the odorant is measured by the determination unit.