The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 10, 2013
Filed:
Oct. 29, 2010
Takashi Matsuda, Fukushima, JP;
Kiyotaka Komori, Fukushima, JP;
Akiyoshi Nozue, Mie, JP;
Takayuki Suzue, Mie, JP;
Mitsuyoshi Nishino, Fukushima, JP;
Toshiyuki Asahi, Osaka, JP;
Yoshito Kitagawa, Osaka, JP;
Naoyuki Tani, Osaka, JP;
Takashi Matsuda, Fukushima, JP;
Kiyotaka Komori, Fukushima, JP;
Akiyoshi Nozue, Mie, JP;
Takayuki Suzue, Mie, JP;
Mitsuyoshi Nishino, Fukushima, JP;
Toshiyuki Asahi, Osaka, JP;
Yoshito Kitagawa, Osaka, JP;
Naoyuki Tani, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
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 μm, (B) at least one inorganic component selected from the group consisting of boehmite particles having an average particle diameter (D) of 2 to 15 μm and inorganic particles that have an average particle diameter (D) of 2 to 15 μm and that contain crystal water having a release initiation temperature of 400° C. or higher or contain no crystal water, and (C) aluminum oxide particles having an average particle diameter (D) of 1.5 μm 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.