Panasonic Intellectual Property Management Co., Ltd.

Tomoegawa Co., Ltd.

Yoshiaki Esaki

Takayoshi Ozeki

Hiroaki Umehara

Yohsuke Ishikawa

Hiroharu Inoue

Yoshihiko Nakamura

Jun Tochihira

Akihiro Yamauchi

Ryu Harada

Hiroyuki Fukusumi

A resin-clad metal foil which enables a reduction in fluidity of a resin during molding and a reduction in extrusion of the resin while maintaining good adhesiveness, bendability, thermal resistance, and circuit filling property. A first insulating layer includes a polyimide resin layer, a polyamideimide resin layer, a liquid crystal polymer resin layer, a fluororesin layer, or a polyphenylene ether resin layer and a second insulating layer includes a polyolefin resin layer in a semi-cured state are disposed in this order on a metal foil. The polyolefin resin layer contains a component representing a polyolefin-based elastomer and a component representing a thermosetting resin. The percentage by mass of the component in the polyolefin resin layer ranges from 50 wt. % to 95 wt. %.

Resin-clad metal foil and flexible printed wiring board

A metal foil with resin is a metal foil with resin including a metal foil and a resin layer disposed on the metal foil, resin layer being obtained by half-curing a resin composition. The resin composition contains a first component that is a polymer, a second component that is a polyarylene ether copolymer, and a third component that is an epoxy resin. The first component has structures represented by formulae (1) and (2) below, with no unsaturated bond between carbon atoms. The third component has two or more epoxy groups per molecule. The second component is compatible with the first component, and the third component is incompatible with the first component. In the formulae (1) and (2), a ratio between x and y is x:y=0:1 to 0.35:0.65, R1 represents hydrogen atom or methyl group, and R2 represents hydrogen atom or an alkyl group. 

Metal foil with resin, and metal-clad laminate and circuit board using same

The flexible printed wiring board according to the present invention includes a first flexible insulating layer, a first conductor wiring laminated on the first insulating layer, a second single-layered insulating layer laminated on the first insulating layer, as it covers the first conductor wiring, and a second conductor wiring laminated on the second insulating layer. The first conductor wiring has a thickness in the range of 10 to 30 &#x3bc;m, a line width in the range of 50 &#x3bc;m to 1 mm, and a line gap in the range of 50 &#x3bc;m to 1 mm. The thickness from the surface of the first conductor wiring to the surface of the second insulating layer is in the range of 5 to 30 &#x3bc;m. The surface waviness of the part of the second insulating layer covering the first conductor wiring is 10 &#x3bc;m or less.

Flexible printed wiring board and laminate for production of flexible printed wiring board

The flexible metal-cladded base material pertaining to the present invention includes a metal foil and a first resin layer. The first resin layer is of a first resin composition containing a polyamide-imide resin. The polyamide-imide resin includes a first constituent unit represented by Formula (1) and a second constituent unit represented by Formula (2). The percentage of the second constituent unit is in a range of 5 to 35% by mol. 

Flexible metal-cladded base material, method for producing flexible metal-cladded base material, printed wiring board, multilayer flexible printed wiring board, and flex-rigid printed wiring board

Growing community of inventors

Osaka, Japan

Yoshiaki Esaki