Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Akiyoshi Nozue

Toshiyuki Asahi

Takashi Matsuda

Kiyotaka Komori

Naoyuki Tani

Mitsuyoshi Nishino

Yoshito Kitagawa

Takayuki Suzue

A laminate with superior thermal conductivity, heat resistance, drill workability, and fire retardancy is provided. In a prepreg obtained by impregnating a woven or nonwoven fabric base with a thermosetting resin composition, the thermosetting resin composition contains 80 to 200 parts by volume of an inorganic filler per 100 parts by volume of a thermosetting resin, the inorganic filler contains (A) gibbsite type aluminum hydroxide particles having an average particle diameter (D) of 2 to 15 &#x3bc;m and (B) magnesium oxide having an average particle diameter (D) of 0.5 to 15 &#x3bc;m, and a compounding ratio (volume ratio) of the gibbsite type aluminum hydroxide particles (A) to the magnesium oxide (B) is 1:0.3 to 3.

Prepreg, laminate, metal foil-clad laminate, circuit board and LED module

Disclosed is a prepreg obtained by impregnating a woven fabric base with a thermosetting resin composition, wherein the thermosetting resin composition contains 80 to 200 volume parts of an inorganic filler per 100 volume parts of a thermosetting resin, and the inorganic filler contains (A) gibbsite aluminum hydroxide particles having an average particle diameter (D) of 2 to 15 &#x3bc;m, (B) at least one inorganic component selected from the group consisting of boehmite particles having an average particle diameter (D) of 2 to 15 &#x3bc;m and inorganic particles that have an average particle diameter (D) of 2 to 15 &#x3bc;m and that contain crystal water having a release initiation temperature of 400&#xb0; C. or higher or contain no crystal water, and (C) aluminum oxide particles having an average particle diameter (D) of 1.5 &#x3bc;m or smaller, the compounded ratio (volume ratio) of the gibbsite aluminum hydroxide particles (A), the at least one inorganic component (B) selected from the group consisting of the boehmite particles and the inorganic particles, and the aluminum oxide particles (C) being 1:0.1 to 2.5:0.1 to 1.

Prepreg, laminate, metal clad laminate, circuit board, and circuit board for LED mounting

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Mie, Japan

Akiyoshi Nozue