Panasonic Corporation

Matsushita Electric Industrial Co., Ltd.

Kyoto Elex Co., Ltd.

Tsuyoshi Himori

Suzushi Kimura

Shogo Hirai

Koji Hashimoto

Hiroyuki Ishitomi

Satoru Tomekawa

Masaaki Katsumata

Yutaka Nakayama

Toshikazu Kondou

Yoshiyuki Yamamoto

Joji Fujiwara

Yasuhiro Sugaya

Toshiyuki Asahi

Shigeo Furukawa

Katsumasa Miki

Tsutomu Inuzuka

Michiaki Tsuneoka

Satoshi Tomioka

Tetsuro Kubo

A circuit board includes a core substrate portion, an insulating layer, a second wiring, and a via to be a cured product of a via paste. The via paste has a first latent curing agent and a second latent curing agent, an uncured resin mixture, and a conductive particle. Both a softening temperature of the first latent curing agent and that of the second latent curing agent are equal to or higher than 40&#xb0; C. and are equal to or lower than 200&#xb0; C., and a difference between the softening temperature of the first latent curing agent and that of the second latent curing agent is equal to or higher than 10&#xb0; C. and is equal to or lower than 140&#xb0; C.

Circuit board and method of manufacturing the circuit board

A multilayer wiring board includes an insulating resin layer, wirings laid on their respective opposite surfaces of the insulating resin layer, and a via-hole conductor for electrically connecting the wirings. The via-hole conductor includes metal and resin portions. The metal portion includes first metal regions including a joined unit made of copper particles for connecting the wirings, second metal regions mainly composed of, for example, tin, a tin-copper alloy, or a tin-copper intermetallic compound, and third metal regions mainly composed of bismuth and in contact with the second metal regions. The copper particles forming the joined unit are in plane contact with one another to form plane contact portions, and the second metal regions at least partially are in contact with the first metal regions.

Multilayer wiring substrate and manufacturing method of multilayer wiring substrate

A method of manufacturing a circuit board includes the steps of preparing a fiber piece housing paste, fabricating a filtered recovery paste, fabricating a reuse paste, sticking a protective film, forming a hole, and filling the hole with the reuse paste. Furthermore, the method includes the steps of forming a protruded portion constituted of the reuse paste, disposing a metallic foil on both sides of a second prepreg to carry out pressurization, heating the second prepreg to cure the second prepreg and the reuse paste, and processing the metallic foil into a wiring pattern.

Method of manufacturing circuit board

A wiring board includes a plurality of wirings laid via an insulating resin layer, and a via-hole conductor provided for electrically connecting the wirings. The via-hole conductor includes metal and resin portions. The metal portion includes a region made of copper particles, a first metal region mainly composed of tin, a tin-copper alloy, or a tin-copper intermetallic compound, and a second metal region mainly composed of bismuth, and has Cu/Sn of from 1.59 to 21.43. The copper particles are in contact with one another, thereby electrically connecting the wirings, and at least part of the first metal region covers around and extends over the portions where the copper particles are in plane contact with one another.

Wiring board, wiring board manufacturing method, and via paste

In a method of manufacturing a circuit board, a conductive paste is filled in a first hole formed on a first prepreg having both sides to which a first protective film is caused to stick so that a first circuit board is manufactured. A fiber piece housing paste obtained by mixing a fiber piece is recovered to obtain a recovery paste; filtration is carried out through a filter; a solvent or the like is added; and a viscosity, a composition ratio or the like is adjusted so that a reuse paste is fabricated. The reuse paste is filled in a second hole formed on a second prepreg having both sides to which a second protective film is caused to stick.

The mounting board has a capacitor-forming sheet made from a valve metal, first and second board-forming structures, first and second electrodes, an extractor electrode, and a conductive polymer. The capacitor-forming sheet has an inner layer and a rough oxide film on at least one face of the inner layer. The first board-forming structure is provided on a face of the capacitor-forming sheet, and the second board-forming structure is provided on another face thereof on a side opposite to the first one. The first and second electrodes are isolated to each other and provided on a surface of at least one of the first and second board-forming structures. The extractor electrode and conductive polymer are provided inside at least one of the first and second board-forming structures. The extractor electrode electrically-connects the first electrode with the inner layer. The conductive polymer electrically-connects the second electrode with the rough oxide film.

Mounting board, mounted body, and electronic equipment using the same

A module component in which mounting components and a conductive partition for dividing into a plurality of circuit blocks are mounted on a substrate. The circuit blocks are covered with a sealing member, which is further covered on its surface with a conductive film to electrically shield the circuit blocks individually. This module component can maintain bending strength, with little warpage by a sufficient shielding effect achieved without increasing the number of manufacturing processes.

Module component and method for manufacturing the same

An electronic component includes conductive pattern () on insulating substrate (), a metal film formed by a plating method on a surface of conductive pattern (), and metal oxide layer () formed by oxidizing the metal film on the surface of conductive pattern (). This structure allows forming a thin and uniform insulating film on conductive pattern (), so that the highly reliable electric component is obtainable although its conductive pattern () has a high aspect ratio.

Electronic part and manufacturing method thereof

According to the invention, the method of manufacturing a module component comprises an inserting step of inserting a chip component in a first molding die; a primary molding step of filling the first molding die with resin with a first end electrode of the chip component exposed; a peeling step of peeling the first molding die at a side of inserting the chip component; a secondary molding step of filling a second molding die with resin with a second end electrode of the chip component; and a forming step of forming a circuit wiring on one side or both sides of a molded element molded with resin, wherein the chip component is disposed according to a specified rule, and the chip component is molded with the resin.

Method of forming a module component having a plurality of penetration holes

The invention relates to a module component having chip components buried in a circuit board, and a method of manufacturing the same, and more specifically it relates to a module component capable of obtaining desired circuit characteristics and functions stably if the size of the component is reduced, being produced very efficiently, and suited to machine mounting, and a method of manufacturing the same. According to the invention, since a desired circuit is composed by disposing a specific number of chip components according to a specified rule, it is not necessary to heat the buried chip components at high temperature when forming a module, chip components are obtained in specified values, and the circuit characteristics, functions, and dimensional precision are stably obtained exactly as designed, and moreover since the chip components are disposed according to a specified rule, it is easy to automate insertion of chip components and increase its operation speed, even if the size of the chip components is reduced, and the circuit composition may be flexibly and easily changed only by changing the inserting position and type of chip components.

Growing community of inventors

Osaka, Japan

Tsuyoshi Himori