Nippon Steel & Sumikin Chemical Co., Ltd.

Hongyuan Wang

Katsufumi Hiraishi

Masakazu Katayama

Natsuko Okazaki

Yoshiki Suto

Eijiro Aoyagi

Noriyuki Kirikae

Provided is a display device that can be made thin, lightweight, and flexible, has no problems of cracks and peeling caused by thermal stress, and is excellent in dimension stability and the like. The display device includes: a supporting base including a polyimide film; and a gas barrier layer formed on the supporting base, in which the polyimide film has a transmittance of 80% or more in a wavelength region of from 440 nm to 780 nm, and a coefficient of thermal expansion of 15 ppm/K or less, and has a difference in coefficient of thermal expansion from the gas barrier layer of 10 ppm/K or less.

Display device, method for manufacturing same, polyimide film for display device supporting bases, and method for producing polyimide film for display device supporting bases

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.

Highly heat conductive polyimide film, highly heat conductive metal-clad laminate, and method for producing the same

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Kisarazu, Japan

Hongyuan Wang