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:
Jan. 17, 2012
Filed:
Oct. 04, 2007
Satoru Amou, Hitachi, JP;
Haruo Akahoshi, Hitachi, JP;
Hiroshi Shimizu, Chikusei, JP;
Akinori Hanawa, Shimotsuma, JP;
Satoru Amou, Hitachi, JP;
Haruo Akahoshi, Hitachi, JP;
Hiroshi Shimizu, Chikusei, JP;
Akinori Hanawa, Shimotsuma, JP;
Hitachi Chemical Company, Ltd., Tokyo, JP;
Abstract
It is an objective of this invention to obtain: a composition superior in processability, dielectric properties, heat resistance, and adhesiveness by controlling phase separation of a 1,2-polybutadiene resin composition without deterioration of dielectric properties exhibited in high-frequency regions; and a multilayer printed wiring board using the same. This invention relates to a polybutadiene resin composition, comprising: a crosslinking component (A) comprising repeating units represented by the following formula (1) and having a number average molecular weight of 1000 to 20000; a radical polymerization initiator (B), the one-minute half-life temperature of which is 80° C. to 140° C.; and a radical polymerization initiator (C), the one-minute half-life temperature of which is 170° C. to 230° C.; wherein 3 to 10 parts by weight of the component (B) and 5 to 15 parts by weight of the component (C) are contained relative to 100 parts by weight of the component (A). The invention also relates to a prepreg, a laminate, and a printed wiring board, which are produced using the same.