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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 12330981 B1

PDFFull Text
Date of Patent:
Jun. 17, 2025

Filed:

Dec. 27, 2018

Polyimide precursor resin composition for forming flexible device substrate

Applicant:

Ube Corporation, Ube, JP;

Inventors:

Norio Miura, Ube, JP;

Kazutaka Narita, Ube, JP;

Takeshige Nakayama, Ube, JP;

Assignee:

UBE Corporation, Ube, JP;

Attorney:

Knobbe, Martens, Olson & Bear, LLP

Primary Examiner:

Ha S Nguyen

Int. Cl.
CPC ...
C03C 17/32 (2006.01); B05D 1/00 (2006.01); B05D 3/02 (2006.01); B32B 9/00 (2006.01); B32B 17/10 (2006.01); C03C 17/42 (2006.01); C08G 73/10 (2006.01); C08G 73/12 (2006.01); C08J 5/18 (2006.01); C09D 179/08 (2006.01); C23C 16/40 (2006.01); G02F 1/1333 (2006.01); G02F 1/1368 (2006.01); G09F 9/30 (2006.01); H10D 30/67 (2025.01); H10D 86/40 (2025.01); H10D 86/60 (2025.01);
U.S. Cl.
CPC ...
C03C 17/32 (2013.01); B32B 17/10 (2013.01); C03C 17/42 (2013.01); C08G 73/1028 (2013.01); C08G 73/1067 (2013.01); C08G 73/1071 (2013.01); C08G 73/121 (2013.01); C08G 73/128 (2013.01); C09D 179/08 (2013.01); C09D 179/085 (2013.01); C23C 16/401 (2013.01); G02F 1/133305 (2013.01); H10D 30/6746 (2025.01); H10D 86/411 (2025.01); H10D 86/421 (2025.01); H10D 86/60 (2025.01); C03C 2218/116 (2013.01); C03C 2218/152 (2013.01); G02F 1/1368 (2013.01);
Abstract

A polyimide precursor resin composition for forming a flexible device substrate, including a polyamic acid having a structure obtained from a tetracarboxylic acid component including at least one of 3,3',4,4′-biphenyltetracarboxylic dianhydride and pyromellitic dianhydride, a diamine component including at least one of paraphenylene diamine and 4,4′-diaminodiphenyl ether, and a carboxylic acid monoanhydride, the polyamic acid satisfying equations (1) and (2) below:0.97≤<1.00  Equation (1)0.5≤(/2)/()≤1.05  Equation (2)in which X represents a number of moles of tetracarboxylic acid component, Y represents a number of moles of diamine component, and Z represents a number of moles of the carboxylic acid monoanhydride.

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