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. 07, 2021
Filed:
Feb. 27, 2018
Applicant:
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Inventors:
Shigeru Yamatsu, Osaka, JP;
Naoki Kanagawa, Mie, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 23/29 (2006.01); C08K 3/36 (2006.01); H01L 23/31 (2006.01); H01L 23/00 (2006.01);
U.S. Cl.
CPC ...
H01L 23/296 (2013.01); C08K 3/36 (2013.01); H01L 23/31 (2013.01); H01L 24/07 (2013.01);
Abstract
A thermosetting composition for use as an underfill material contains: a mono- or bifunctional acrylic compound; a thermo-radical polymerization initiator; silica; and an elastomer including a 1,2-vinyl group. The thermosetting composition is liquid and has a property of turning, when cured thermally, into a cured product having a relative dielectric constant of 3.2 or less at 25° C. and a dielectric loss tangent of 0.013 or less at 25° C.