Abstract: Provided is a double-sided adhesive tape or sheet which is light-weight and has excellent strength and insulating properties even when the thickness of the tape or sheet is small. This double-sided adhesive tape or sheet comprises a laminate including a support and two adhesive agent layers formed on opposite surfaces of the support, wherein the support contains a polypropylene resin, the adhesive agent layers contain an acrylic polymer, the laminate has a total thickness (Ds) of 4-15 ?m, the value of the ratio Dp/Ds of the thickness (Dp) of the support to the total thickness (Ds) of the laminate is 0.15-0.6, and the laminate has a density of 0.90-1.10 g/cm3.

Abstract: An optical waveguide mounting substrate includes a wiring substrate, and an optical waveguide mounted on the wiring substrate with an adhesive layer being interposed therebetween. The optical waveguide includes a first cladding layer, a core layer formed on a surface of the first cladding layer facing toward the wiring substrate, and a second cladding layer formed on the surface of the first cladding layer facing toward the wiring substrate so as to cover a periphery of the core layer. An opening is opened on the second cladding layer-side, penetrating the second cladding layer and the core layer, and closed on the first cladding layer-side, and a metal film is provided on an end face of the core layer in the opening. The second cladding layer faces the wiring substrate via the adhesive layer. A part of the adhesive layer is filled in the opening.

Abstract: An optical waveguide is formed on a support member. A second cladding layer is formed on a surface of a first cladding layer so as to cover a core layer. An opening is opened at the second cladding layer-side, penetrates the second cladding layer and the core layer, and closed at the first cladding layer-side. The opening has a first surface and a second surface ranging from the opened side to the closed side. In a vertical section taken along a longitudinal direction of the core layer, a first angle between a perpendicular line drawn from an opening end of the first surface to the surface of the first cladding layer and the first surface, and a second angle between a perpendicular line drawn from an opening end of the second surface to the surface of the first cladding layer and the second surface are all acute angles.

Abstract: An optical waveguide device includes an optical-electrical hybrid substrate and a lens component mounted on the optical-electrical hybrid substrate. The optical-electrical hybrid substrate includes a wiring substrate and an optical waveguide on the wiring substrate. An optical path changer is arranged on an end of the optical waveguide. The optical waveguide includes an opening configured to expose a connection pad of the wiring substrate. The lens component includes a component body including a conductive member receptacle at a position corresponding to the opening of the optical waveguide. The lens component includes a conductive member partially accommodated in the conductive member receptacle and configured to connect the lens component to the connection pad.

Abstract: An optical waveguide device includes an optical-electrical hybrid substrate and a lens component mounted on the optical-electrical hybrid substrate. The optical-electrical hybrid substrate includes a wiring substrate and an optical waveguide on the wiring substrate. An optical path changer is arranged on an end of the optical waveguide. The optical waveguide includes an opening configured to expose a connection pad of the wiring substrate. The lens component includes a component body including a conductive member receptacle at a position corresponding to the opening of the optical waveguide. The lens component includes a conductive member partially accommodated in the conductive member receptacle and configured to connect the lens component to the connection pad.

Abstract: An optical waveguide having a plurality of optical paths is formed on a substrate. A reflection mechanism is arranged above the optical waveguide. The reflection mechanism includes mirror components, each of which has an inclined reflective surface, and a mask having a plurality of openings. Laser is irradiated to the mirror components and optical path conversion inclined surfaces are formed in the plurality of optical paths at the same time by the laser reflected on the mirror components.

Abstract: An optical waveguide includes a substrate, a first clad layer, a core layer, and a second clad layer that are successively stacked. A first protection part formed on the substrate covers a side surface of the first clad layer, and a second protection part formed on the first clad layer covers a side surface of the second clad layer. The second clad layer is smaller than the first clad layer in a plan view of the optical waveguide. The first protection part widens from a top surface towards a bottom surface of the first clad layer, and the second protection part widens from a top surface towards a bottom surface of the second clad layer.

Abstract: A light waveguide includes a first cladding layer, a groove formed in the first cladding layer, a core layer embedded in the groove, and a second cladding layer formed on the first cladding layer and the core layer. A width and thickness of one end of the core layer are larger than a width and thickness of the other end of the core layer.

Abstract: A light waveguide includes a first cladding layer, a groove formed in the first cladding layer, a core layer embedded in the groove, and a second cladding layer formed on the first cladding layer and the core layer. A width and thickness of one end of the core layer are larger than a width and thickness of the other end of the core layer.

Abstract: An optical module includes: an optical/electrical composite board including: a wiring board; an optical waveguide disposed on the wiring board; and a first optical path changing portion disposed at one end portion of the optical waveguide, a lens component including a lens configured to collect the light emitted from the optical path changing portion; and a fixation member fixed to the optical/electrical composite board. A through hole is formed through the lens component. The lens component is disposed on the optical/electrical composite board such that the fixation member is disposed in the through hole. A resin portion is provided in the through hole such that the fixation member is embedded in the resin portion.

Abstract: An optical module includes: an optical/electrical composite board including: a wiring board; an optical waveguide disposed on the wiring board; and a first optical path changing portion disposed at one end portion of the optical waveguide, a lens component including a lens configured to collect the light emitted from the optical path changing portion; and a fixation member fixed to the optical/electrical composite board. A through hole is formed through the lens component. The lens component is disposed on the optical/electrical composite board such that the fixation member is disposed in the through hole. A resin portion is provided in the through hole such that the fixation member is embedded in the resin portion.

Abstract: An optical waveguide device includes a wiring board, an optical waveguide, an optical path conversion mirror, a hole, and a lens component. The optical waveguide is disposed on the wiring board and includes first and second cladding layers and a core layer. The optical path conversion mirror is formed in the optical waveguide. The hole is formed in the first and second cladding layers and outside an optical waveguide formation region. The lens component is optically coupled to the optical path conversion mirror. The lens component includes a lens main body, a bump, and protrusion portions. The lens main body has a lens function. The bump is fixed to a structure including the wiring board and the optical waveguide, in the hole by a joining material. A diameter of a tip end of the bump of the lens component is smaller than a minimum diameter of the hole.

Abstract: An optical waveguide having a plurality of optical paths is formed on a substrate. A reflection mechanism is arranged above the optical waveguide. The reflection mechanism includes mirror components, each of which has an inclined reflective surface, and a mask having a plurality of openings. Laser is irradiated to the mirror components and optical path conversion inclined surfaces are formed in the plurality of optical paths at the same time by the laser reflected on the mirror components.

Abstract: A cyclonic separator and a vacuum cleaner which efficiently separates dust, collect the dust without re-scattering it and make low noise are provided. In a primary cyclone portion 10, a primary swirl chamber 12 swirls air containing dust sucked from a primary inlet 11, and thereby, separates a first dust and a second dust from the air containing dust to collect them respectively in a zero-order dust case 114 which is provided at a side of the primary swirl chamber 12 and communicates with a zero-order opening portion 113 provided at a side wall, and a primary dust case 14 provided at a lower side of the primary swirl chamber 12.

Abstract: An optical waveguide device includes a wiring board, an optical waveguide, an optical path conversion mirror, a hole, and a lens component. The optical waveguide is disposed on the wiring board and includes first and second cladding layers and a core layer. The optical path conversion mirror is formed in the optical waveguide. The hole is formed in the first and second cladding layers and outside an optical waveguide formation region. The lens component is optically coupled to the optical path conversion mirror. The lens component includes a lens main body, a bump, and protrusion portions. The lens main body has a lens function. The bump is fixed to a structure including the wiring board and the optical waveguide, in the hole by a joining material. A diameter of a tip end of the bump of the lens component is smaller than a minimum diameter of the hole.

Abstract: A cyclonic separator and a vacuum cleaner which efficiently separates dust, collect the dust without re-scattering it and make low noise are provided. In a primary cyclone portion 10, a primary swirl chamber 12 swirls air containing dust sucked from a primary inlet 11, and thereby, separates a first dust and a second dust from the air containing dust to collect them respectively in a zero-order dust case 114 which is provided at a side of the primary swirl chamber 12 and communicates with a zero-order opening portion 113 provided at a side wall, and a primary dust case 14 provided at a lower side of the primary swirl chamber 12.

Abstract: An optical module is provided with a case, which includes an accommodation portion, optical elements, optical waveguide cores, a clad layer, and an optical path changing unit. The optical elements are accommodated in and fixed to the accommodation portion. The optical elements have optical axis centers. The optical waveguide cores are respectively formed at positions corresponding to the planar positions of the optical axis centers. The clad layer surrounds the optical waveguide cores. The clad layer and the optical waveguide cores form an optical waveguide. The optical waveguide is stacked on a wiring substrate including a wiring pattern to which electrode terminals of the optical elements are connected, and the case is mounted on the wiring substrate. The optical path changing unit is formed at a position corresponding to the planar positions of the optical axis centers and faces the optical waveguide at a predetermined angle.

Abstract: An optical waveguide device includes, a substrate, an optical waveguide arranged on the substrate, an optical element arranged on the substrate and optically coupled to one end part of the optical waveguide, a flame retardant adhesive layer covering the optical waveguide, and a connector portion adhered to other end part of the optical waveguide by the flame retardant adhesive layer.

Abstract: A method of manufacturing an optical waveguide, includes forming a first light path core layer having a first light path length on a first cladding layer, forming a groove portion having an inclined surface in an end side of the first light path core layer, forming a second light path core layer having a second light path length which is longer than the first light path length, in a lateral area of the first light path core layer, forming a groove portion having an inclined surface, arranged to an outer side than the groove portion of the first light path core layer, in an end side of the second light path core layer, forming partially a metal layer on the respective inclined surfaces of the first and second light path core layer, and forming a second cladding layer covering the first and second light path core layer.

Abstract: There is provided an optical waveguide device. The device includes: a wiring substrate having a first opening portion therein and including: a substrate having an upper surface and a lower surface opposite to the upper surface; an upper side wiring layer formed on the upper surface of the substrate, and a lower side wiring layer formed on the lower surface of the substrate, an optical waveguide formed on the lower side wiring layer; a first optical element connected to the upper side wiring layer; a first circuit element electrically connected to the first optical element through the upper side wiring layer; a second optical element connected to the lower side wiring layer through the first opening portion; and a second circuit element electrically connected to the second optical element through the lower side wiring layer.