Abstract: A method of manufacturing a through hole of a substrate includes forming, to the substrate, a cutting hole surrounding a removal-target-part such that a connection part of the substrate remains, the connection part that connects the removal-target-part that is removed from the substrate and a remaining part other than the removal-target-part that has been removed, along a cutting line of the through hole formed to the substrate; applying plating on an area including an inner peripheral wall face of the cutting hole of the substrate; applying a film covering an opening of the cutting hole on a surface of the substrate applied with the plating and performing exposure and development of the film to form an etching resist covering an area including the opening of the cutting hole; performing etching of the plating applied on the substrate; removing the etching resist; and cutting the connection part to remove the removal-target-part.

Abstract: A wiring board includes, a base plate that has a first surface, a second surface opposite to the first surface, and a side surface coupled to the first surface and the second surface, a conductor provided on the side surface, and a protrusion provided over the side surface. The protrusion partitions the conductor into a first portion on the side surface that extends to the first surface and a second portion on the side surface that extends to the second surface. The protrusion has a solder wettability lower than the conductor and protrudes from the conductor.

Abstract: A printed wiring board includes: a laminated body that has a plurality of wiring layers laminated therein; a first through hole that electrically connects two or more wiring layers with each other; and a second through hole that has strength to expansion and contraction of the laminated body less than in the first through hole.

Abstract: A method of manufacturing a through hole of a substrate includes forming, to the substrate, a cutting hole surrounding a removal-target-part such that a connection part of the substrate remains, the connection part that connects the removal-target-part that is removed from the substrate and a remaining part other than the removal-target-part that has been removed, along a cutting line of the through hole formed to the substrate; applying plating on an area including an inner peripheral wall face of the cutting hole of the substrate; applying a film covering an opening of the cutting hole on a surface of the substrate applied with the plating and performing exposure and development of the film to form an etching resist covering an area including the opening of the cutting hole; performing etching of the plating applied on the substrate; removing the etching resist; and cutting the connection part to remove the removal-target-part.

Abstract: A method for inspecting a laminated board, includes: performing a reflow process to solder an electronic component to a surface of a laminated board in which at least one of a plurality of wiring layers which are laminated with each other is coupled to another adjacent wiring layer via a via; and inspecting, in the reflow process, a conduction state of the via after a temperature of the laminated board reaches a melting point of a solder, and when the temperature of the laminated board is at a temperature range lower than the melting point and higher than room temperature.

Abstract: A substrate includes an insulation layer including a glass cloth impregnated with a resin, and a through hole having a hole included in the insulation layer and plating formed in an inner surface of the hole, where a location, intersecting with the glass cloth, of an outer circumferential portion of the through hole has a recessed portion recessed toward an outside of the hole.

Abstract: A wiring board includes, a base plate that has a first surface, a second surface opposite to the first surface, and a side surface coupled to the first surface and the second surface, a conductor provided on the side surface, and a protrusion provided over the side surface. The protrusion partitions the conductor into a first portion on the side surface that extends to the first surface and a second portion on the side surface that extends to the second surface. The protrusion has a solder wettability lower than the conductor and protrudes from the conductor.

Abstract: A substrate includes an insulation layer including a glass cloth impregnated with a resin, and a through hole having a hole included in the insulation layer and plating formed in an inner surface of the hole, where a location, intersecting with the glass cloth, of an outer circumferential portion of the through hole has a recessed portion recessed toward an outside of the hole.

Abstract: A method for inspecting a laminated board, includes: performing a reflow process to solder an electronic component to a surface of a laminated board in which at least one of a plurality of wiring layers which are laminated with each other is coupled to another adjacent wiring layer via a via; and inspecting, in the reflow process, a conduction state of the via after a temperature of the laminated board reaches a melting point of a solder, and when the temperature of the laminated board is at a temperature range lower than the melting point and higher than room temperature.

Abstract: A printed wiring board includes: a laminated body that has a plurality of wiring layers laminated therein; a first through hole that electrically connects two or more wiring layers with each other; and a second through hole that has strength to expansion and contraction of the laminated body less than in the first through hole.

Abstract: A printed wiring board includes: a laminated body that has a plurality of wiring layers laminated therein; a first through hole that electrically connects two or more wiring layers with each other; and a second through hole that has strength to expansion and contraction of the laminated body less than in the first through hole.

Abstract: A rigid flexible board includes: a substrate that has flexibility and electric insulation; a protective layer formed at a central portion of each of opposite surfaces of the substrate; and a plurality of core layers partially covering the protective layer and formed at a circumferential edge of each of the opposite surfaces of the substrate; wherein a gap is formed close to a center of the substrate in a thickness direction thereof between the core layers and the protective layer.

Abstract: Disclosed substrate with embedded component includes: an insulating base member; a conductive pad formed on the insulating base member; a component connected to the conductive pad with a solder; and a resin covering the component, wherein a hole is provided in the insulating base member and the conductive pad, and the insulating base member is exposed on a side surface of the hole.

Abstract: Disclosed substrate with embedded component includes: an insulating base member; a conductive pad formed on the insulating base member; a component connected to the conductive pad with a solder; and a resin covering the component, wherein a hole is provided in the insulating base member and the conductive pad, and the insulating base member is exposed on a side surface of the hole.

Abstract: A printed wiring board includes: a laminated body that has a plurality of wiring layers laminated therein; a first through hole that electrically connects two or more wiring layers with each other; and a second through hole that has strength to expansion and contraction of the laminated body less than in the first through hole.

Abstract: A repair system which prevents heating of weakly heat resistant devices together and causing deterioration of the quality when preheating a first surface of the circuit board, wherein an electromagnetic induction material is buried in advance inside the circuit board near a specific electronic device envisioned as needed repair when becoming a defective electronic device in a production process and an electromagnetic coil emitting electromagnetic waves to an electromagnetic induction member in the vicinity of the repair device is provided and the heat generated by the electromagnetic induction member due to the electromagnetic waves enables the repair device to be heated and detached from the circuit board.

Abstract: A multilayer printed circuit board includes an interior interconnect layer, and a semiconductor package including a flexible interconnect structure whose distal end is a free end, wherein the flexible interconnect structure and the interior interconnect layer are electrically connected to each other.

Abstract: A printed circuit board includes a printed circuit board body and a resin layer. The printed circuit board body includes a plurality of mounting pads. The resin layer, containing a thermoplastic resin, is formed on the surface of the printed circuit board body. The resin layer includes a plurality of holes disposed to be aligned with the positions of the mounting pads on a one-to-one basis for exposing the mounting pads therethrough. In a method of fabricating the printed circuit board, the resin layer is formed atop the printed circuit board body.

Abstract: A printed circuit board unit includes a printed circuit board and an electronic component. The electronic component is electrically connected to a predetermined position on the printed circuit board by means of soldering while being joined to the printed circuit board using an adhesive layer. The adhesive layer, disposed between the printed circuit board and the electronic component, partially includes a multilayer laminated region including a first reinforcement resin layer and a second reinforcement resin layer. The first reinforcement resin layer is disposed on a side of the printed circuit board, whereas the second reinforcement resin layer is disposed on a side of the electronic component. The second reinforcement resin layer has adhesive strength greater than that of the first reinforcement resin layer.

Abstract: A method for manufacturing a multilayer printed circuit board, and a printed circuit board manufactured according to the method, includes laterally-aligning a first inner substrate in which first insulation layers and first conductor layers are alternately laminated and a second inner substrate in which second insulation layers and second conductor layers are alternately laminated. The second inner substrate has a lager number of layers than the first inner substrate. The laterally-aligned first inner substrate and second inner substrate are placed between a pair of third insulation layers in a thickness direction. The pair of the third insulation layer are heated under pressure in the thickness direction. A conductor pattern is formed on surfaces of the pair of the third insulation layers.