Nippon Steel & Sumikin Chemical Co., Ltd.

Eijiro Aoyagi

Katsufumi Hiraishi

Hongyuan Wang

Noriyuki Kirikae

A highly heat conductive metal-clad laminate, which may be included in a highly heat conductive polyimide film, has a metal layer on one or both sides of an insulating layer which has a heat conductive filler-filled polyimide layer. The insulating layer of the highly heat conductive metal-clad laminate or the highly heat conductive polyimide film having the filler-filled polyimide layer is characterized in that the content of the heat conductive filler in the filler-filled polyimide layer is 20-80 wt %, the heat conductive filler contains a plate-like filler with an average length Dof 0.1-15 &#x3bc;m and a spherical filler with an average particle diameter Dof 0.05-10 &#x3bc;m, Dand Dsatisfy the relationship D&#x3e;D/2, no heat conductive filler of 30 &#x3bc;m or more is contained, and the coefficient of thermal expansion is in the range of 10-30 ppm/K.

Growing community of inventors

Kisarazu, Japan

Eijiro Aoyagi