Abstract: A printed wiring board for package-on-package includes a first insulating layer, a wiring layer including a conductor pattern and formed on first surface of the first insulating layer, a second insulating layer formed on first surface side of the first insulating layer, electrodes formed in through holes of the first insulating layer respectively such that the electrodes electrically connect to the conductor pattern and have exposed surfaces exposed from second surface of the first insulating layer, first pads formed on the second insulating layer and positioned to connect an IC chip in center portion of the second insulating layer, second pads formed on the second insulating layer and positioned in outer edge portion of the second insulating layer to connect a second printed wiring board, and via conductors formed in the second insulating layer such that the via conductors electrically connect the first and second pads to the conductor pattern.

Abstract: An inductor component includes a resin insulating layer having an opening portion, a first coil formed on a first surface of the resin insulating layer such that the first coil is surrounding the opening portion, a second coil that is formed on a second surface of the resin insulating layer on the opposite side with respect to the first surface such that the second coil is surrounding opening portion, a via conductor formed through the resin insulating layer such that the via conductor is connecting the first coil and the second coil, and a magnetic body structure having an opening portion magnetic body filling the opening portion of the resin insulating layer, a first surface magnetic body covering the first coil, and a second surface magnetic body covering the second coil.

Abstract: A multilayer wiring board includes a main wiring board including insulation layers, first via conductors formed in the insulation layers, and a first conductive layer including first mounting pads such that the first mounting pads are positioned to mount a first electronic component and a second electronic component adjacent to each other on the main wiring board, and a wiring structure body mounted on the main wiring board such that the wiring structure body is positioned in an outermost insulation layer of the insulation layers, the wiring structure body including a second conductive layer which includes second mounting pads such that the second mounting pads are positioned to connect to the first electronic component and the second electronic component mounted on the main wiring board. The first via conductors are formed such that the first via conductors have diameters which increase in a same direction.

Abstract: A printed wiring board includes a core substrate, a first buildup layer formed on a first surface of the core substrate and including an insulation layer and a conductive layer, a second buildup layer formed on a second surface of the core substrate on the opposite side with respect to the first buildup layer and including an insulation layer and a conductive layer, and an inductor device positioned in the second buildup layer and including a resin insulation layer and a coil layer formed on the resin insulation layer. The second buildup layer has a cavity in which the inductor device is accommodated.

Abstract: A printed wiring board has a core base having an opening portion, an inductor component accommodated in the opening portion, and a filler resin filling gap between the component and a side wall of the opening portion. The component has a support layer, a first conductive pattern on the support, an interlayer insulation layer on the support and first pattern, a second conductive pattern on the insulation layer, and a via conductor in the insulation layer and connecting the first and second patterns, the insulation layer includes a magnetic layer and a resin layer covering the magnetic layer, the magnetic layer includes magnetic material and resin material and has a first hole, the insulation layer has a second hole penetrating through the resin layer such that the second hole passes through the first hole and extends to the first pattern, and the via conductor is formed in the second hole.

Abstract: A printed wiring board includes a first resin insulating layer, a first conductor pattern including first mounting pads formed on the first resin insulating layer, and a wiring structure positioned on the first resin insulating layer and including a second resin insulating layer and a second conductor pattern such that the second resin insulating layer and second conductor pattern are positioned adjacent to the first conductor pattern and that the second conductor pattern includes second mounting pads. The second mounting pads are embedded in the second resin insulating layer such that the second mounting pads have mounting surfaces exposed on an exposed surface of the second resin insulating layer, and the first mounting pads have mounting surfaces such that the mounting surfaces of the first and second mounting pads are formed on a same plane.

Abstract: A printed wiring board includes a core substrate having a cavity and having first and second surfaces, an inductor component accommodated in the cavity, a filler resin filling a gap formed between the substrate and component in the cavity, and a buildup layer formed on the first surface of the substrate and the component. The component has a coil layer, a second insulation layer formed on the coil layer, an electrode formed on the substance layer, and a via conductor formed in the substance layer and connecting the coil layer and the electrode, the component is accommodated in the cavity such that the electrode faces the first surface of the substrate, and the buildup layer includes an interlayer insulation layer formed on the first surface of the substrate and the component, a conductive layer formed on the insulation layer, and a connection via conductor connecting the conductive layer and electrode.

Abstract: A printed wiring board includes a core substrate having a cavity, an inductor component positioned in the cavity of the substrate, a first buildup layer formed on first surface of the substrate, and a second buildup layer formed on second surface of the substrate. The inductor component includes an insulating layer having first openings and a second opening formed between the first openings, conductive through holes formed in the first openings, respectively, a magnetic body formed in the second opening, a first interconnect formed on first surface of the insulating layer and connecting the conductive through holes on the first surface of the insulating layer, and a second interconnect formed on second surface of the insulating layer and connecting the conductive through holes on the second surface of the insulating layer, and the first interconnect, second interconnect and conductive through holes are positioned to form a spiral structure.

Abstract: An electronic circuit apparatus includes a circuit substrate, a heat generating component positioned on the circuit substrate, a metal plate forming a portion of an inner layer of the circuit substrate and protruding from a side surface of the circuit substrate such that the metal plate has an exposed portion exposed to outside the circuit substrate, and an external component connected to the exposed portion of the metal plate and including one of an external heat dissipation component and an external cooling component.

Abstract: A method for manufacturing a wiring board includes positioning on a first insulation layer a wiring structure including an insulation layer and conductive patterns formed on the insulation layer, forming a second insulation layer on the first insulation layer and the wiring structure such that the wiring structure is interposed between the first insulation layer and the second insulation layer, forming a via conductor through the second insulation layer, and forming conductive patterns on the second insulation layer such that one of the conductive patterns on the second insulation layer is connected to the via conductor in the second insulation layer.

Abstract: A printed wiring board includes an uppermost insulating layer, first pads positioned to mount an IC chip on the insulating layer, second pads positioned to mount a second printed wiring board on the insulating layer, metal posts formed on the second pads, respectively, such that the metal posts mount the second board over the chip, and a solder resist layer formed on the uppermost insulating layer and having first and second openings such that the first openings exposes the first pads and that the second openings exposes the second pads, respectively. The metal posts are formed such that each of the metal posts has a diameter which is smaller than a diameter of each of the second opening portions, and the second opening portions are formed such that the diameter of each of the second opening portions is smaller than a diameter of each of the second pads.

Abstract: A printed wiring board includes a first insulating layer, a first conductor layer formed on a surface of the first insulating layer and including first pads, and a wiring structure including a second conductor layer formed on the first insulating layer, a second insulating layer laminated on the second conductor layer, a third conductor layer formed on the second insulating layer, and formed through the second insulating layer. The second conductor layer includes second pads formed on the first insulating layer, the third conductor layer includes third pads formed on the second insulating layer, the via conductors are positioned such that the via conductors are connecting the second pads and the third conductor layer, and the wiring structure is formed such that the second conductor layer and third conductor layer are not electrically connected to the first conductor layer.

Abstract: A wiring board includes a substrate having an opening portion, electronic components positioned in the opening portion of the substrate and including first and second electronic components, and an insulation layer formed over the substrate and the first and second components. The first component has first and second electrodes having side portions on side surfaces of the first component, the second component has first and second electrodes having side portions on side surfaces of the second component, the first electrode of the first component and the first electrode of the second component are set to have substantially the same electric potential, and the first component and the second component are positioned in the opening portion of the substrate such that the side portion of the first electrode of the first component is beside the side portion of the first electrode of the second component.

Abstract: A printed wiring board includes a core substrate, a first buildup layer formed on first-surface side of the substrate, a second buildup layer formed on second-surface side of the substrate, and an inductor component formed on the second-surface side of the substrate. The inductor component includes a base layer, first conductive patterns formed on first surface of the base layer, second conductive patterns formed on second surface of the base layer and through-hole conductors connecting the first and second conductive patterns through the base layer such that the inductor component has an inductor structure having the first conductive patterns, the second conductive patterns and the through-hole conductors, and the base layer of the inductor component has a magnetic body structure including magnetic material such that the magnetic body structure is positioned on an inner side of the inductor structure.

Abstract: A wiring board includes a first insulation layer, a second insulation layer formed on the first insulation layer, a wiring structure interposed between the first insulation layer and the second insulation layer and including an insulation layer and conductive patterns formed on the insulation layer, second conductive patterns formed on the second insulation layer, and a via conductor formed through the second insulation layer and connected to one of the second conductive patterns on the second insulation layer.

Abstract: A wiring board includes a first resin insulating layer, conductor pads on the first insulating layer including first and second conductor pads, a second resin insulating layer on the first insulating layer covering the first and second pads, an outermost conductor layer on the second insulating layer including first and second outermost wiring layers, via conductors through the second insulating layer including a first via conductor connecting the first wiring layer and first pad and a second via conductor connecting the second wiring layer and second pad, and a solder resist layer on the second insulating layer such that the solder resist layer is covering the first wiring layer and has one or more openings exposing the second wiring layer. The first wiring layer includes first main metal, and the second wiring layer includes second main metal which is different from the first metal of the first wiring layer.

Abstract: A flex-rigid wiring board includes a flexible substrate, a non-flexible substrate positioned such that the non-flexible substrate is extending in horizontal direction of the flexible substrate, a first wiring layer on first surface sides of the flexible and non-flexible substrates, a second wiring layer on second surface sides of the flexible and non-flexible substrates, a first insulating layer covering the first sides of the flexible and non-flexible substrates and having an opening exposing a portion of the first side of the flexible substrate, and a second insulating layer covering the second sides of the flexible and non-flexible substrates and having an opening exposing a portion of the second side of the flexible substrate. The first wiring layer includes first conductor pattern on the first side of the flexible substrate, and the second wiring layer includes second conductor pattern extending across the second sides of the flexible and non-flexible substrates.

Abstract: A flex-rigid wiring board includes a flexible substrate, a non-flexible substrate positioned such that the non-flexible substrate is extending in horizontal direction of the flexible substrate, a first wiring layer formed on first surfaces of the flexible and non-flexible substrates, a second wiring layer embedded in second surfaces of the flexible and non-flexible substrates, a first insulating layer covering the first surfaces of the flexible and non-flexible substrates and having an opening exposing a portion of the first surface of the flexible substrate, and a second insulating layer covering the second surfaces of the flexible and non-flexible substrates and having an opening exposing a portion of the second surface of the flexible substrate. The first wiring layer includes non-embedded wirings on the first surfaces of the flexible and non-flexible substrates, and the second wiring layer includes embedded wirings in the second surfaces of the flexible and non-flexible substrates.

Abstract: A method for manufacturing a printed wiring board includes forming a resin layer on an interlayer layer such that the resin layer has first openings exposing circuits in central portion and second openings exposing circuits in peripheral portion of the interlayer layer, forming solder bumps on the circuits in the first openings, forming a plating resist over the bumps and resin layer such that the resist has openings having diameters greater than the second openings and exposing the second openings, forming a seed layer on the resist, in the openings and on the circuits through the second openings, applying electrolytic plating on the resist such that electrolytic plating fills the openings and forms a plated film on the resist and metal posts in the openings, etching the plating such that the plated film is removed and recesses are formed on end surfaces of the posts, and removing the resist.

Abstract: A method for manufacturing a printed wiring board includes forming a resin insulation layer on an interlayer resin insulation layer and conductive circuits such that the resin insulation layer has first openings exposing pad portions in central portion of the interlayer layer and second openings exposing pad portions in peripheral portion of the interlayer layer, forming a seed layer on the resin insulation layer, in the first and second openings and on the pad portions, forming on the seed layer a plating resist such that the resist has resist openings exposing the second openings and having diameters greater than the second openings, filling the resist openings with electrolytic plating material via the seed layer such that metal posts are formed in the resist openings, removing the resist from the resin insulation layer, and removing the seed layer exposed on the resin insulation layer by the removing of the resist.