Abstract: There is provided a method of manufacturing an optical connector, including: preparing a multi-core optical fiber including a glass fiber and a resin coating that covers the glass fiber; inserting the glass fiber exposed from the resin coating into the ferrule such that the glass fiber protrudes from an end surface of a ferrule by a length A; rotating and aligning the multi-core optical fiber with respect to the ferrule; fixing the multi-core optical fiber to the ferrule; and so as to scrap off a tip end of the ferrule by a length. A deviation angle in the circumferential direction between a first initial end surface of the one end of the prepared glass fiber and a cross section of the glass fiber separated from the initial end surface by a length A+B mm is equal to or less than 0.9°.
Abstract: This axial gap motor includes: a stator; and a rotor provided so as to be opposed to the stator in an axial direction. The rotor includes an annular rotor yoke, and a plurality of magnets provided to contact one surface of the rotor yoke so as to be arranged at predetermined intervals along a circumferential direction with magnetic poles thereof being different alternately. The one surface includes a plurality of facing areas facing and contacting the plurality of magnets, and a non-facing area not facing the plurality of magnets. The non-facing area includes partial areas each located between a pair of the facing areas adjacent to each other in the circumferential direction among the plurality of facing areas. The partial areas are formed to be recesses recessed in the axial direction relative to the facing areas.
September 5, 2019
September 16, 2021
SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.
Abstract: A method for collecting an iron-based powder includes the steps of; preparing a raw material powder containing a first metal powder containing 90% by mass or more of iron; forming a green compact by subjecting the raw material powder to uniaxial pressing using a die; machining the green compact; and collecting a second metal powder having an average particle diameter of 50 ?m or more and 500 ?m or less from machining chips generated in the step of machining.
June 2, 2021
September 16, 2021
Sumitomo Electric Industries, Ltd., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.
Abstract: This power supply circuit is configured to supply power to an amplifier and includes: a power supply line extending by branching from a signal line through which a signal inputted to the amplifier is transferred or a signal outputted from the amplifier is transferred; and a capacitive element having one end connected to a distal end of the power supply line, and another end grounded, the capacitive element leading the signal to a ground, wherein a base end of the power supply line is a branch portion at which the power supply line branches from the signal line, and a line length of the power supply line extending from the branch portion to the distal end is shorter than ?/4, where ?, is a wavelength of the signal.
Abstract: A surface-coated cutting tool includes a substrate and a coating film that coats the substrate, wherein the coating film includes a WC1-x layer composed of a compound represented by WC1-x, where x is more than or equal to 0.54 and less than or equal to 0.58, and the compound represented by WC1-x includes a hexagonal crystal structure.
Abstract: A quantum cascade laser including: a laser structure having a first region including a first facet, a second region including a second facet, an epitaxial surface, and a substrate surface; an insulating film disposed on the second facet and the epitaxial surface; an electrode disposed on the epitaxial surface and the insulating film and in contact with the epitaxial surface; and a metal film disposed over the second facet and the epitaxial surface and separated from the electrode and the substrate surface. The insulating film is disposed between the metal film and the second facet and between the metal film and the epitaxial surface. The second region includes a semiconductor mesa. The second facet is located at a boundary between the first region and the second region. The first region includes a connecting surface. The connecting surface connects the second facet to the first facet.
Abstract: A connector-cable module includes a multicore cable including first, second, and third signal lines; and a connector connected to one end of the multicore cable and including a board and first, second, and third pads connected to the first, second, and third signal lines and provided on the board. A first signal and a second signal transmitted through the first and second signal lines form a differential signal. The connector is configured such that when a line passes through a first gravity center of the first pad and a second gravity center of the second pad, a foot of a perpendicular drawn from a third gravity center of the third pad to the line is located between the first gravity center and the second gravity center.
Abstract: An object of the present disclosure is to provide a core electric wire for a multi-core cable that is superior in flex resistance at low temperature, and a multi-core cable employing the same. A core electric wire for a multi-core cable according to an aspect of the present disclosure comprises a conductor obtained by twisting element wires, and an insulating layer covering the conductor, wherein a linear expansion coefficient C of the insulating layer at from 25° C. to ?35° C. is no less than 1×10?5 K?1 and no greater than 2.5×10?4 K?1.
Abstract: The silicon carbide semiconductor chip includes a silicon carbide substrate, a first insulating film on the silicon carbide substrate, and a second insulating film on the first insulating film. The silicon carbide substrate has a first main surface in contact with the first insulating film, a second main surface, and an outer peripheral surface. The resin covers both of the outer peripheral surface and the second insulating film. The second insulating film has a Young's modulus lower than that of the resin. The second insulating film has a thermal expansion coefficient higher than that of the silicon carbide substrate and higher than that of the resin. The second insulating film includes a first outer peripheral end portion. In a cross section perpendicular to the first main surface, the first outer peripheral end portion is provided along the outer peripheral surface.
Abstract: An optical-fiber holding component disposed in a ferrule holding a plurality of optical fibers, which respectively have at least one core in a region shifted from a region on a center axis and are arranged in a first direction intersecting with the center axis line, is disclosed. The optical-fiber holding component comprises a holding part defining a position of each of coating removed portions in a plane perpendicular to the center axis and holding the coating removed portions, each of the coating removed portions being obtained by removing a resin coating by a predetermined length from a tip end of each of the optical fibers; and a fixing part arranged side by side with the holding part in a second direction along the center axis, resin coated portions of the optical fibers being fixed to the fixing part.
Abstract: An aluminum alloy wire composed of an aluminum alloy, wherein the aluminum alloy contains more than or equal to 0.03 mass % and less than or equal to 1.5 mass % of Mg, more than or equal to 0.02 mass % and less than or equal to 2.0 mass % of Si, and a remainder of Al and an inevitable impurity, Mg/Si being more than or equal to 0.5 and less than or equal to 3.5 in mass ratio, and the aluminum alloy wire has a dynamic friction coefficient of less than or equal to 0.8.
Abstract: A multi-core flat cable for a vehicle includes a sheath covering two power wires and at least two signal wires. A pair of the signal wires is twisted and is configured as one twisted pair of signal wires. On a section perpendicular to a longitudinal direction, a ratio (long-axis dimension/short-axis dimension) of a long-axis dimension to a short-axis dimension is equal to or greater than 1.8.
Abstract: A bipolar plate arranged to face an electrode along which electrolyte is circulated, the bipolar plate includes a flow passage that is provided on at least one of front and back surfaces of the bipolar plate and along which the electrolyte is circulated. The flow passage provided on the at least one of the front and back surfaces of the bipolar plate includes an introduction path along which the electrolyte is introduced and a discharge path that does not communicate with and is independent of the introduction path and along which the electrolyte is discharged. At least one of the introduction path and the discharge path includes an inclined groove that non-orthogonally intersects a long side and a short side of an imaginary rectangle that includes an outer edge of the bipolar plate.
Abstract: An optical-electric composite cable includes a cable unit, at least one metal wire, and a sheath. The cable unit includes at least one optical fiber and a twisted pair wire twisted with the at least one optical fiber. The at least one metal wire is disposed around the cable unit. The sheath surrounds the cable unit and the at least one metal wire.
Abstract: A thermoelectric conversion material is composed of a compound semiconductor including a plurality of base material elements, and includes: an amorphous phase; and crystal phases having an average grain size of more than or equal to 5 nm, each of the crystal phases being in a form of a grain. The plurality of base material elements include a specific base material element that causes an increase of a band gap by increasing a concentration of the specific base material element. An atomic concentration of the specific base material element included in the crystal phases with respect to a whole of the plurality of base material elements included in the crystal phases is higher than an atomic concentration of the specific base material element included in the compound semiconductor with respect to a whole of the plurality of base material elements included in the compound semiconductor.
March 26, 2019
August 26, 2021
SUMITOMO ELECTRIC INDUSTRIES, LTD., TOYOTA SCHOOL FOUNDATION
Abstract: The present disclosure relates to an optical fiber ribbon in which a plurality of optical fibers are covered with a ribbon resin, wherein the ribbon resin is a cured product of a resin composition including a base resin containing oligomers, monomers and a photopolymerization initiator, and inorganic oxide particles.
Abstract: This wiring module includes: a wiring substrate; a base portion at which the wiring substrate is placed; and an adhesive layer configured to adhere the wiring substrate to the base portion, wherein the wiring substrate includes: a land portion configured to have a power generating element mounted thereto; and a wire portion configured to be electrically connected to the power generating element, the adhesive layer has: a land adhesion region configured to adhere the land portion to the base portion; and a wire adhesion region configured to adhere the wire portion to the base portion, and a width of the wire adhesion region is smaller than a width of the land adhesion region.
Abstract: A storage battery system includes: a grid-connected storage battery; and a first current sensor that is provided in an electrical circuit linking the storage battery and the grid and detects a current in the electrical circuit the storage battery system having the electrical circuit connected with one or more power generators. The storage battery system includes: a second current sensor that is provided in the electrical circuit such that the one or more power generators are connected between the first current sensor and the second current sensor; and a controller that calculates generated power of the one or more power generators based on outputs obtained from the first current sensor and the second current sensor.
Abstract: A relay device performs relay processing of relaying data between a plurality of function units mounted on a vehicle and includes a counting unit that counts each of the numbers of relayed packets that are the numbers of packets relayed to respective target function units being the plurality of function units of a same type in the relay processing and a detection unit that monitors a count value of the numbers counted by the counting unit and detects unauthorized communication with the target function units based on a maximum value and a minimum value of the numbers of relayed packets counted by the counting unit.
Abstract: An optical fiber according to an embodiment includes: a core; an inner cladding surrounding the core and having a refractive index smaller than a refractive index of the core; an outer cladding surrounding the inner cladding and having a smaller refractive index than the refractive index of the core and having a refractive index greater than the refractive index of the inner cladding, in which a ratio of a caustic radius to a MAC-value (caustic radius/MAC-value) at a bending radius of 10 mm at a wavelength of 1625 nm is 2.70 ?m or more.