Hitachi, Ltd.

Rohm Co., Ltd.

Pioneer Corporation

Mitsubishi Chemical Corporation

Kyoto University

Shin-ichiro Iwamoto

Akira Nagai

Yoshitaka Takezawa

Takashi Kurihara

Takao Miwa

Toshiyuki Miyadera

Hiroyuki Yano

Tohru Maruno

Keishin Handa

Masaya Nogi

Tohru Matsuura

Junji Sugiyama

Nobutatsu Koshoubu

The present invention relates to a fiber-reinforced composite material and a method for manufacturing the same, and also relates to a transparent multilayered sheet, a circuit board, and an optical waveguide.

Fiber-reinforced composite material, method for manufacturing the same, and applications thereof

There is provided a fiber-reinforced composite material containing fibers having an average fiber diameter of 4 to 200 nm and a matrix material, the composite material having a visible light transmittance of 60% or more at a wavelength of 400 to 700 nm, which is a conversion value based on a thickness of 50 &#x3bc;m. A fiber-reinforced composite material composed of a matrix material and a fiber aggregate impregnated therewith is provided, in which when a segment length of a bright region corresponding to a pore region of the fiber aggregate is represented by L, which is obtained by statistical analysis of a unidirectional run-length image formed from a binary image obtained by binarization of a scanning electron microscopic image of the fiber aggregate, the total length of segments that satisfy L&#x2267;4.5 &#x3bc;m is 30% or less of the total analyzed length. A transparent multilayered sheet, a circuit board, and an optical waveguide are provided which use a transparent substrate formed from this fiber-reinforced composite material.

Fiber-reinforced composite material, method for manufacturing the same and applications thereof

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Uji, Japan

Shin-ichiro Iwamoto