Ube Industries, Inc.

Ube Nitto Kasei Co., Ltd.

Takuro Kochiyama

Masami Sasaki

Kohji Narui

Hiroto Shimokawa

Masafumi Hashimoto

Yoshitaka Mineki

A copper-clad laminate is prepared by laminating a copper foil on one side or both sides of a polyimide film by thermocompression bonding. The flexibility of the copper-clad laminate is remarkably improved by employing a polyimide film having a thickness of 5 to 20 &#x3bc;m and a copper foil having a thickness of 1 to 18 &#x3bc;m.

Copper clad laminate

A method for producing a flexible metal laminate includes continuously thermocompression-bonding laminate metal foils to a resin film. The thermocompression-bonding step is conducted by placing a protection metal foil between a pressure surface of a heat and pressure forming apparatus and the laminate metal foils. When the protection metal foil is subjected to an abrasion resistance test, in which the protection metal foil is placed such that a matte surface of the protection metal foil contacts a plate material having a surface equivalent to the pressure surface and in which the matte surface is rubbed against the surface of the plate material by applying a load to a shiny surface of the protection metal foil and pulling the protection metal foil, a streak is found on the matte surface only in a case where the load is over 500 g per area of 76 mm&#xd7;26 mm.

Method for producing flexible metal laminate

Growing community of inventors

Ube, Japan

Takuro Kochiyama