Abstract: A chip resistor includes: an insulating substrate; a pair of front electrodes; a resistor connecting between both the front electrodes; an undercoat layer provided on the resistor; an overcoat layer provided on the undercoat layer, an auxiliary film provided so as to be over a connecting portion between the front electrode and the resistor at a position away from an end face of the insulating substrate; a pair of end face electrodes; and a pair of external plating layers covering the end face electrodes, the front electrodes, and the auxiliary film, wherein the auxiliary film is formed of a resin material containing metal particles, and a portion of the auxiliary film is sandwiched between the undercoat layer and the overcoat layer.

Abstract: After a sulfidation detection conductor (2) is formed on a front surface of a large-sized substrate (10A), a pair of first protective films (3) made of an insoluble material is formed, respectively, on predetermined positions of the sulfidation detection conductor (2), and a second protective film (7) made of a soluble material is formed so as to cover the sulfidation detection conductor (2) positioned between the pair of first protective films (3), and thereafter, end face electrodes (5) are formed, respectively, on divided faces of each strip-shaped substrate (10B) obtained by primarily dividing the large-sized substrate (10A). Then, after external electrodes (6) are formed by performing electrolytic plating with respect to each chip substrate (10C) obtained by secondarily dividing each strip-shaped substrate (10B), a sulfidation detection portion (2a) is exposed to the outside by removing the second protective film (7), whereby a sulfidation detection sensor (10) can be obtained.

Abstract: Provided is a power conversion device, including: a casing having a recessed portion; a magnetic component accommodated in the recessed portion of the casing; a heat radiation plate, which covers an opening of the recessed portion of the casing, and is thermally coupled to the magnetic component; and a fixing band wound around the magnetic component and the heat radiation plate to fix the magnetic component to the heat radiation plate, wherein at least a part of the fixing band is accommodated in a band accommodating groove formed in the recessed portion of the casing. With this configuration, assembly dimensional tolerance caused between the magnetic component and the heat radiation plate can be eliminated and it is therefore possible to maintain high output and achieve downsizing.

Abstract: A power converter includes a circuit board, a first magnetic core, and a housing. The circuit board includes an insulating substrate and a first coil conductor. The insulating substrate includes a first side surface. The first magnetic core includes a first magnetic core member and a second magnetic core member. A first side surface of the insulating substrate is opposed to a first portion of the housing and is spaced away from the first portion of the housing. The first magnetic core member and the second magnetic core member are both thermally connected to the first portion.

Abstract: A sulfurization detection sensor 10 comprises: a rectangular parallelepiped insulation substrate 1, a pair of front electrodes 2 provided at both ends of a front surface in the longitudinal direction of the insulation substrate 1, respectively, a sulfurization detection conductor 3 connected between the front electrodes 2, a pair of protective films 4 for covering a part of the sulfurization detection conductor 3 and that of the front electrodes 2, respectively, a pair of back electrodes 5 provided at both ends of a back surface in the longitudinal direction of the insulation substrate 1, respectively, a pair of end face electrodes 6 provided at both ends in the longitudinal direction of the insulation substrate 1, respectively, and external electrodes 7 provided on front surfaces of the end face electrodes 6, respectively. Specific regions 3b in which a current hardly flows are formed at both ends in the Y-direction of a sulfurization detection portion 3A.

Abstract: A chip resistor 10 comprises: a insulating substrate 1; a pair of upper surface electrodes 2; a resistor 3; a pair of lower surface electrodes 5; a pair of resin electrode layers 6 made of synthetic resin materials containing conductive particles and laminated on the pair of lower surface electrodes 5; a pair of end face electrodes 7; and a pair of external electrodes 8, wherein the pair of the lower surface electrodes 5 is made of metal thin film layers formed as thin films on a mounting surface of the insulating substrate 1, respectively, and includes exposed portions 5a exposed from the resin electrode layers 6, respectively, and the pair of external electrodes 8 is in contact with the exposed portions 5a of the lower surface electrodes 5 and entire surfaces of the resin electrode layers 6, respectively. [Selected drawing] FIG.

Abstract: This disclosure describes techniques for detecting voice commands from a user of an ear-based device. The ear-based device may include an in-ear facing microphone to capture sound emitted in an ear of the user, and an exterior facing microphone to capture sound emitted in an exterior environment of the user. The in-ear microphone may generate an inner audio signal representing the sound emitted in the ear, and the exterior microphone may generate an outer audio signal representing sound from the exterior environment. The ear-based device may compute a ratio of a power of the inner audio signal to the outer audio signal and may compare this ratio to a threshold. If the ratio is larger than the threshold, the ear-based device may detect the voice of the user. Further, the ear-based device may set a value of the threshold based on a level of acoustic seal of the ear-based device.

Abstract: A chip resistor includes: an insulating substrate; a pair of front electrodes; a resistor connecting between both the front electrodes; an undercoat layer provided on the resistor; an overcoat layer provided on the undercoat layer, an auxiliary film provided so as to be over a connecting portion between the front electrode and the resistor at a position away from an end face of the insulating substrate; a pair of end face electrodes; and a pair of external plating layers covering the end face electrodes, the front electrodes, and the auxiliary film, wherein the auxiliary film is formed of a resin material containing metal particles, and a portion of the auxiliary film is sandwiched between the undercoat layer and the overcoat layer.

Abstract: A sulfidation detection sensor includes a rectangular parallelepiped insulating substrate, a resistor formed to adhere closely to a surface of the insulating substrate, a sulfidation detection conductor formed to adhere closely to a surface of the resistor, a protective layer that is impermeable to sulfide gas and formed to cover a portion of the sulfidation detection conductor, and a pair of electrode portions formed at both ends of the insulating substrate and connected to the resistor and the sulfidation detection conductor. The sulfidation detection conductor is made of metal having a resistance value less than that of the resistor, and includes an exposed portion exposed to the outside without being covered with the protective layer.

Abstract: Provided is an electric power converter, including: a casing; a heat radiating plate having a first main surface and a second main surface; and a substrate which is fixed to the main surface and to which a heat generating component is mounted, wherein the casing has an inner wall surface in which a first tapered portion is formed, wherein the heat radiating plate includes a second tapered portion which is connected to the first tapered portion in a heat exchangeable manner and slid with respect to the first tapered portion, wherein the heat radiating plate is configured to be displaced in a first direction with respect to the casing by the second tapered portion being slid with respect to the first tapered portion, and wherein the heat generating component is connected to the casing in a heat exchangeable manner by the heat radiating plate being displaced in the first direction.

Abstract: A sulfurization detection resistor includes: a rectangle-shaped insulating substrate; pair of front electrodes formed at both ends facing each other on a surface of the insulating substrate; plurality of sulfurization detection conductors arranged in parallel between the paired front electrodes; plurality of resistors connected between the ends of each of the sulfurization detection conductors and the paired front electrodes; and sulfide gas impermeable protective film that covers all of the resistors and some of the sulfurization detection conductors, wherein each of the sulfurization detection conductors has a sulfurization detection unit exposed from a window hole in the protective film; and by covering the sulfurization detection units with different types of sulfurization rate adjustment layers formed of an acrylic resin, a silicon resin, and the like, timing of disconnection is set so as to vary in response to a cumulative amount of sulfurization in each of the sulfurization detection units.

Abstract: A power converter includes a cooler, a housing, a cooling plate, an insulating heat dissipation member, and a circuit board. The housing includes a bottom, a sidewall, and an internal space. The bottom is connected to the cooler. The cooling plate is connected to the bottom so as to stand upright with respect to the bottom. The insulating heat dissipation member is disposed on the cooling plate. The circuit board is connected to the cooling plate with the insulating heat dissipation member interposed therebetween. The cooling plate, the insulating heat dissipation member, and the circuit board are accommodated in the internal space of the housing. The cooling plate is disposed with a gap from the sidewall.

Abstract: A sulfurization detection sensor 10 comprises: a rectangular parallelepiped insulation substrate 1, a pair of front electrodes 2 provided at both ends of a front surface in the longitudinal direction of the insulation substrate 1, respectively, a sulfurization detection conductor 3 connected between the front electrodes 2, a pair of protective films 4 for covering a part of the sulfurization detection conductor 3 and that of the front electrodes 2, respectively, a pair of back electrodes 5 provided at both ends of a back surface in the longitudinal direction of the insulation substrate 1, respectively, a pair of end face electrodes 6 provided at both ends in the longitudinal direction of the insulation substrate 1, respectively, and external electrodes 7 provided on front surfaces of the end face electrodes 6, respectively. Specific regions 3b in which a current hardly flows are formed at both ends in the Y-direction of a sulfurization detection portion 3A.

Abstract: After a sulfidation detection conductor (2) is formed on a front surface of a large-sized substrate (10A), a pair of first protective films (3) made of an insoluble material is formed, respectively, on predetermined positions of the sulfidation detection conductor (2), and a second protective film (7) made of a soluble material is formed so as to cover the sulfidation detection conductor (2) positioned between the pair of first protective films (3), and thereafter, end face electrodes (5) are formed, respectively, on divided faces of each strip-shaped substrate (10B) obtained by primarily dividing the large-sized substrate (10A). Then, after external electrodes (6) are formed by performing electrolytic plating with respect to each chip substrate (10C) obtained by secondarily dividing each strip-shaped substrate (10B), a sulfidation detection portion (2a) is exposed to the outside by removing the second protective film (7), whereby a sulfidation detection sensor (10) can be obtained.

Abstract: A power converter includes a circuit board, a first magnetic core, and a housing. The circuit board includes an insulating substrate and a first coil conductor. The insulating substrate includes a first side surface. The first magnetic core includes a first magnetic core member and a second magnetic core member. A first side surface of the insulating substrate is opposed to a first portion of the housing and is spaced away from the first portion of the housing. The first magnetic core member and the second magnetic core member are both thermally connected to the first portion.

Abstract: Provided are an anion exchange resin being capable of producing an electrolyte membrane, a binder for forming an electrode catalyst layer and a battery electrode catalyst layer, which have improved electrical properties and chemical properties. For example, used is an anion exchange resin which has a hydrophobic unit being composed of bisphenol AF residues repeated via carbon-carbon bond and a hydrophilic unit being composed of hydrophilic groups repeated via carbon-carbon bond, in which the hydrophilic group is formed by connecting an anion exchange group to a fluorene backbone via a divalent saturated hydrocarbon group, and in which the hydrophobic unit and the hydrophilic unit are connected via carbon-carbon bond.

Abstract: Provided is an electric power converter, including: a casing; a heat radiating plate having a first main surface and a second main surface; and a substrate which is fixed to the main surface and to which a heat generating component is mounted, wherein the casing has an inner wall surface in which a first tapered portion is formed, wherein the heat radiating plate includes a second tapered portion which is connected to the first tapered portion in a heat exchangeable manner and slid with respect to the first tapered portion, wherein the heat radiating plate is configured to be displaced in a first direction with respect to the casing by the second tapered portion being slid with respect to the first tapered portion, and wherein the heat generating component is connected to the casing in a heat exchangeable manner by the heat radiating plate being displaced in the first direction.

Abstract: Provided is a power conversion device, including: a casing having a recessed portion; a magnetic component accommodated in the recessed portion of the casing; a heat radiation plate, which covers an opening of the recessed portion of the casing, and is thermally coupled to the magnetic component; and a fixing band wound around the magnetic component and the heat radiation plate to fix the magnetic component to the heat radiation plate, wherein at least a part of the fixing band is accommodated in a band accommodating groove formed in the recessed portion of the casing. With this configuration, assembly dimensional tolerance caused between the magnetic component and the heat radiation plate can be eliminated and it is therefore possible to maintain high output and achieve downsizing.

Abstract: A sulfurization detection resistor includes: a rectangle-shaped insulating substrate; pair of front electrodes formed at both ends facing each other on a surface of the insulating substrate; plurality of sulfurization detection conductors arranged in parallel between the paired front electrodes; plurality of resistors connected between the ends of each of the sulfurization detection conductors and the paired front electrodes; and sulfide gas impermeable protective film that covers all of the resistors and some of the sulfurization detection conductors, wherein each of the sulfurization detection conductors has a sulfurization detection unit exposed from a window hole in the protective film; and by covering the sulfurization detection units with different types of sulfurization rate adjustment layers formed of an acrylic resin, a silicon resin, and the like, timing of disconnection is set so as to vary in response to a cumulative amount of sulfurization in each of the sulfurization detection units.

Abstract: This disclosure describes techniques for detecting voice commands from a user of an ear-based device. The ear-based device may include an in-ear facing microphone to capture sound emitted in an ear of the user, and an exterior facing microphone to capture sound emitted in an exterior environment of the user. The in-ear microphone may generate an inner audio signal representing the sound emitted in the ear, and the exterior microphone may generate an outer audio signal representing sound from the exterior environment. The ear-based device may compute a ratio of a power of the inner audio signal to the outer audio signal and may compare this ratio to a threshold. If the ratio is larger than the threshold, the ear-based device may detect the voice of the user. Further, the ear-based device may set a value of the threshold based on a level of acoustic seal of the ear-based device.