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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.:

US 11479637 B1

PDFFull Text
Date of Patent:
Oct. 25, 2022

Filed:

Oct. 03, 2017

Sheet-shaped prepreg

Applicant:

Daicel Corporation, Osaka, JP;

Inventors:

Hiroto Miyake, Himeji, JP;

Kiyoharu Tsutsumi, Tokyo, JP;

Ryosuke Ieki, Himeji, JP;

Assignee:

DAICEL CORPORATION, Osaka, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Callie E Shosho

Assistant Examiner:

Bethany M Miller

Int. Cl.
CPC ...
C08G 59/24 (2006.01); C08J 5/24 (2006.01); C08G 59/68 (2006.01); C08G 59/42 (2006.01); C08G 59/62 (2006.01); C08G 59/50 (2006.01); C08K 3/36 (2006.01); C08K 3/04 (2006.01); H01L 23/29 (2006.01); H01L 23/31 (2006.01);
U.S. Cl.
CPC ...
C08G 59/245 (2013.01); C08G 59/4238 (2013.01); C08G 59/4284 (2013.01); C08G 59/502 (2013.01); C08G 59/504 (2013.01); C08G 59/621 (2013.01); C08G 59/625 (2013.01); C08G 59/686 (2013.01); C08J 5/245 (2021.05); C08K 3/041 (2017.05); C08K 3/36 (2013.01); C08J 2363/02 (2013.01); C08J 2363/04 (2013.01); C08K 2201/003 (2013.01); C08K 2201/004 (2013.01); C08K 2201/005 (2013.01); C08K 2201/011 (2013.01); H01L 23/29 (2013.01); H01L 23/31 (2013.01);
Abstract

Provided is a sheet-like prepreg that has both a low coefficient of linear thermal expansion and high flexibility and offers excellent anti-warpage performance and cracking resistance. The sheet-like prepreg according to the present invention includes a curable composition and a sheet-like porous support impregnated with the curable composition. The sheet-like porous support is made from a material having a coefficient of linear thermal expansion of 10 ppm/K or less. The sheet-like prepreg gives a cured product having a glass transition temperature of −60° C. to 100° C. The curable composition includes one or more curable compounds (A) and at least one of a curing agent (B) and a curing catalyst (C). The curable compounds (A) include an epoxide having a weight per epoxy equivalent of 140 to 3000 g/eq in an amount of 50 weight percent or more of the totality of the curable compounds (A).

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