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. 29, 2009
Filed:
Sep. 29, 2006
Satoru Amou, Hitachi, JP;
Haruo Akahoshi, Hitachi, JP;
Yoshihiro Nakamura, Chikusei, JP;
Nobuyuki Minami, Chikusei, JP;
Yasuhiro Murai, Chikusei, JP;
Satoru Amou, Hitachi, JP;
Haruo Akahoshi, Hitachi, JP;
Yoshihiro Nakamura, Chikusei, JP;
Nobuyuki Minami, Chikusei, JP;
Yasuhiro Murai, Chikusei, JP;
Hitachi Chemical Co., Ltd., Tokyo, JP;
Abstract
There is provided a varnish of a low dielectric loss tangent resin composition which is low in viscosity and excellent in storage stability. The varnish of a low dielectric loss tangent resin composition contains a thermosetting monomer (A) having a weight average molecular weight of not more than 1,000, a high polymer (B) having a weight average molecular weight of not less than 5,000, a halogen flame-retardant agent (C), a silicon dioxide filler (D), and an organic solvent (E). The average particle diameter of each the components (C) and (D) is in the range of 0.2 to 3 μm.