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:
May. 07, 2024
Filed:
Oct. 01, 2021
Applicant:
Arisawa Mfg. Co., Ltd., Niigata, JP;
Inventors:
Assignee:
Arisawa MFG. Co., Ltd., Niigata, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08G 73/10 (2006.01); H05K 1/03 (2006.01);
U.S. Cl.
CPC ...
C08G 73/10 (2013.01); H05K 1/0346 (2013.01); H05K 2201/0154 (2013.01);
Abstract
A polyimide resin precursor is obtained by allowing a diamine and an acid anhydride to react with each other. The diamine includes p-phenylenediamine, a bis(aminophenoxy)benzene, and 2-(4-aminophenyl)benzoxazol-5-amine. The acid anhydride includes a biphenyl tetracarboxylic dianhydride. The content of the p-phenylenediamine is 30 to 75% by mol, the content of the bis(aminophenoxy)benzene is 10 to 30% by mol, and the content of the 2-(4-aminophenyl)benzoxazol-5-amine is 10 to 50% by mol, with respect to the total of the diamine. The content of the biphenyl tetracarboxylic dianhydride is 78% by mol or more with respect to the total of the acid anhydride.