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:
Feb. 20, 2024
Filed:
Dec. 02, 2019
Pi Advanced Materials Co., Ltd., Chungcheongbuk, KR;
Sung-Yul Back, Chungcheongbuk, KR;
Min-Sang Cho, Chungcheongbuk, KR;
Jin-Seok Jeon, Chungcheongbuk, KR;
Ki-Hoon Kim, Chungcheongbuk, KR;
Kil-Nam Lee, Chungcheongbuk, KR;
PI Advanced Materials Co., Ltd., Chungcheongbuk-do, KR;
Abstract
Disclosed herein is a polyimide film that is obtained by imidizing a polyamic acid solution containing two or more dianhydride components selected from the group consisting of 3,3′,4,4′-benzophenonetetracarboxylic dianhydride (BTDA), 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA), and pyromellitic dianhydride (PMDA), and a diamine component including m-tolidine and p-phenylenediamine (PPD) and has a glass transition temperature (Tg) of 320° C. or higher, a moisture absorption rate of 0.4% or less, and a dielectric dissipation factor (Df) of 0.004 or less.