Fujikura Limited

Shouji Itou

Osamu Nakao

Reiji Higuchi

Satoshi Okude

Masahiro Okamoto

Takanao Suzuki

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

A multilayer wiring board assembly, a multilayer wiring board assembly component and a method of manufacture thereof are described in which it is possible to easily laminate together flexible FPCs having highly packing densities by via-on-via and chip-on-via. The multilayer wiring board assembly is laminated by laminating together a plurality of multilayer wiring board assembly components, each of which is made by preparing a copper plated resin filmmade of a copper plated resin film made of a resin film having adhesivity which is provided with a copper foil bonded to one surface thereof and in which a through hole is opened through said copper foil and said resin film, and a conductive paste filler embedded by screen printing in the through hole of said copper plated resin film from said copper foil with a leading end of said conductive paste filler being projected from said resin film.

Multilayer wiring board assembly, multilayer wiring board assembly component and method of manufacture thereof

A multilayer wiring board assembly, a multilayer wiring board assembly component, and a method of manufacture thereof. The multilayer wiring board assembly is formed by laminating together a plurality of multilayer wiring board assembly components having a flexible resin film with a copper foil bonded to one surface and an adhesive layer bonded to the other surface, opening a through hole in the copper plated resin film through the copper foil, resin film, and the adhesive layer, filling the through hole with a conductive paste projecting from the adhesive layer and laterally extending beyond through hole opening of the copper foil.

A multilayer wiring board assembly, a multilayer wiring board assembly component, and a method of manufacture thereof. The multilayer wiring board assembly is formed by laminating together a plurality of multilayer wiring board assembly components, having a flexible resin film with a copper foil bonded to one surface and an adhesive layer bonded to the other surface, opening a through hole in the copper plated resin film through the copper foil, resin film, and the adhesive layer, and filling the through hole with a conductive paste projecting from the adhesive layer and laterally extending beyond through hole opening of the copper foil.

A multilayer wiring board assembly, a multilayer wiring board assembly component and a method of manufacture thereof are described in which it is possible to easily laminate together flexible FPCs having highly packing densities by via-on-via and chip-on-via. The multilayer wiring board assembly is laminated by laminating together a plurality of multilayer wiring board assembly components, each of which is made by preparing a copper plated resin film made of a copper plated resin film made of a resin film having adhesivity which is provided with a copper foil bonded to one surface thereof and in which a through hole is opened through said copper foil and said resin film, and a conductive paste embedded by screen printing in the through hole of said copper plated resin film from said copper foil with a leading end of said conductive paste being projected from said resin film.

Growing community of inventors

Chiba, Japan

Shouji Itou