Fujikura Limited

Masahiro Okamoto

Osamu Nakao

Reiji Higuchi

Shoji Ito

Syouji Ito

Satoshi Okude

Takanao Suzuki

Shouji Itou

Yoshinori Sano

Kazuhisa Itoi

Ryoichi Kishihara

Hiroki Hashiba

A component-incorporated substrate of multi-layer structure includes: a first printed wiring base having an opening; a second printed wiring base in a first side of the first printed wiring base; a third printed wiring base in a second side of the first printed wiring base; an electronic component housed in the opening of the first printed wiring base; a via penetrating one or more of the first printed wiring base, the second printed wiring base and the third printed wiring base; and an adhesive layer that fills a gap between the electronic component and the opening, a gap between the first printed wiring base and the second printed wiring base, and a gap between the first printed wiring base and the third printed wiring base.

Component-incorporated substrate and method for manufacturing same

A component-incorporated substrate of multi-layer structure includes: a plurality of printed wiring base members that are batch-laminated via an adhesive layer, with the plurality of printed wiring base members including a resin base member that includes a wiring pattern on at least one surface thereof and a via connected to the wiring pattern; an opening disposed in at least one printed wiring base member that is sandwiched on both sides by other printed wiring base members of the plurality of printed wiring base members; and an electronic component disposed in the opening. At least part of the wiring pattern of the printed wiring base member where the opening is formed is disposed in a frame shape surrounding the opening, in a periphery of the opening.

Provided is a component-embedded board which includes: a first board including a first insulation layer, a first conductive layer formed on a second face of the first insulation layer, and an interlayer conductive portion penetrating the first insulation layer to be connected to the first conductive layer and protruding from a first face of the first insulation layer; an electric component connected to the interlayer conductive portion; and a second board including a second insulation layer having an opening portion incorporating the electric component, and a second conductive layer formed on at least either one of a first face and a second face of the second insulation layer. The second conductive layer includes a frame portion. The opening portion is formed so as to penetrate the second insulation layer in a thickness direction thereof over the entirety of the inner region of the frame portion.

Component-embedded board and method of manufacturing same

A multi-layer wiring board that has stacked therein a first printed wiring bases on at least one surface of which a wiring pattern is formed and in which a conductive paste via is formed, that includes an electronic component terminal and a board terminal whose terminal pitch differs from that of the electronic component terminal, and that has an electronic component installed thereon via the electronic component terminal, wherein a second wiring base whose wiring pitch is smaller than that of the first wiring base is built in to a lower portion of an installing portion of the electronic component via the first wiring base, and the second wiring base is connected to the electronic component terminal via the conductive paste via of the first wiring base, has formed on both surfaces thereof a pattern that enlarges the terminal pitch from the electronic component terminal to the board terminal, and includes a via that connects the pattern of the both surfaces.

Multi-layer wiring board

A component built-in board comprises stacked therein a plurality of printed wiring bases having a wiring pattern and a via formed on/in a resin base thereof, and comprises an electronic component built in thereto, wherein at least a portion of the plurality of printed wiring bases include a thermal wiring in the wiring pattern and include a thermal via in the via, at least one of the plurality of printed wiring bases has formed therein an opening where the electronic component is built, and has formed therein a heat-conducting layer and closely attached to a surface on an opposite side to an electrode formation surface of the electronic component built in to the opening, and the electronic component is fixed in the opening by an adhesive layer stacked on the heat-conducting layer, via a hole formed in a region facing onto the opening of the heat-conducting layer.

Component built-in board and method of manufacturing the same, and component built-in board mounting body

A component built-in board, wherein at least two layers of a plurality of printed wiring bases are disposed on a rear surface side of an electronic component; the at least two layers of the printed wiring bases include a heat radiation-dedicated wiring pattern that is disposed above the rear surface of the electronic component; the heat radiation-dedicated wiring pattern is formed such that a heat radiation-dedicated wiring line and a signal-dedicated wiring line are continuous; a via includes a plurality of heat radiation-dedicated vias which connects the rear surface of the electronic component and the heat radiation-dedicated wiring pattern; and the heat radiation-dedicated wiring pattern is continuous from a place where connected to the heat radiation-dedicated via to be connected also to another via disposed at an outer peripheral side of the electronic component.

Component built-in board and method of manufacturing the same

A laminated wiring board, includes: a first substrate in which a conductor circuit is formed on one surface of an insulating layer and an adhesive layer is formed on an other surface of the insulating layer, and conductors are formed in via holes that pass through the insulating layer and the adhesive layer so that the conductor circuit is partially exposed therefrom; an electronic component electrically connected to the conductor circuit by allowing electrodes of the electronic component to be connected to the conductors; an embedding member arranged around the electronic components so that the electronic component is embedded therein; and a second substrate having an adhesive layer laminated to face the adhesive layer of the first substrate and sandwich the electronic component and the embedding member, wherein each of the electrodes of the electronic component is continuous with the conductor circuit through two or more of the conductors.

Laminated wiring board and manufacturing method for same

A base material () is arranged on top of at least one first internal layer base material (), and a second internal base material () is arranged underneath the base material (). And thereafter a surface layer circuitry conductive foil () is arranged underneath the base material (), and subsequently these materials are colaminated for forming a colaminated body (). While this colaminating operation, conductive portions being formed in the base materialsare aligned to electrically connect one another for forming an internal circuitry. And thereafter, an interlayer conductive portion () being electrically connected to the internal circuitry is formed, and a minute circuitry is formed on the top of the base material () and the conductive foil () accordingly.

Multi-layer board manufacturing method thereof

At least one base material having a wiring circuit that has been formed into a predetermined outer shape is bonded to a motherboard. The motherboard wiring board and the base material having a wiring circuit are electrically connected to each other at least one portion through an inner via hole. The outer shape of the base material having a wiring circuit is smaller than the outer shape of the motherboard, with the base material having a wiring circuit having an island shape on the motherboard.

Process for producing multilayer printed wiring board

A configuration according to the invention includes at least one wired base material configured with an insulating base material having an adhesion property, and an electric conductive layer formed on one side of the insulating base material, a plugging electrode made of an electric conductive paste, connected to the electric conductive layer, and penetrating the insulating base material, and an IC chip having a re-wiring portion, the IC chip being buried in an interlayer binding material, with the re-wiring portion connected to the plugging electrode, having a supporting board disposed on an opposite side to the re-wiring portion of the IC chip, with an adhesion layer in between, and having a re-wiring layer configured with the wired base material and the re-wiring portion. According to the invention, therefore, it is allowed to provide a multi-layer printed wing board with highly defined components implemented, allowing for a fabrication by facile processes, without causing, among others, increased costs or decreased yields.

Method of manufacturing a printed wiring board

Multilayer board manufacturing method

A multilayer wiring board assembly component comprises: an insulating substrate component (the insulating resin layer); a conductive layerformed on one surface of said insulating substrate componentin the form of an electrode pattern; an adhesive layerformed on the other surface of said insulating substrate component; and a conductive resin compositionwith which is filled a through hole passing through said insulating substrate component, said adhesive layer and said conductive layer in order to make interlayer interconnection. The bore diameter of the conductive layer portionof the through holeis smaller than the bore diameter of the insulating resin layer portion and the adhesive layer portionto establish electrical connection between the conductive resin compositionand the conductive layerby the rare surfaceof the conductive layer

Growing community of inventors

Sakura, Japan

Masahiro Okamoto