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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 9868823 B1

PDFFull Text
Date of Patent:
Jan. 16, 2018

Filed:

May. 05, 2017

Display device, method for manufacturing same, polyimide film for display device supporting bases, and method for producing polyimide film for display device supporting bases

Applicant:

Nippon Steel & Sumikin Chemical Co., Ltd., Tokyo, JP;

Inventors:

Masakazu Katayama, Tokyo, JP;

Katsufumi Hiraishi, Tokyo, JP;

Yoshiki Suto, Kisarazu, JP;

Natsuko Okazaki, Tokyo, JP;

Hongyuan Wang, Kisarazu, JP;

Assignee:

NIPPON STEEL & SUMIKIN CHEMICAL CO., LTD., Tokyo, JP;

Attorney:

Cheng Law Group, PLLC

Primary Examiner:

William Coleman

Int. Cl.
CPC ...
C08G 73/10 (2006.01); H01L 51/00 (2006.01); H01L 51/52 (2006.01); H01L 27/32 (2006.01); C08J 5/18 (2006.01); G02F 1/167 (2006.01); G02B 5/20 (2006.01); B32B 7/02 (2006.01); B32B 27/28 (2006.01); B32B 27/08 (2006.01);
U.S. Cl.
CPC ...
C08G 73/1067 (2013.01); B32B 7/02 (2013.01); B32B 27/08 (2013.01); B32B 27/281 (2013.01); C08G 73/1039 (2013.01); C08G 73/1042 (2013.01); C08J 5/18 (2013.01); G02B 5/20 (2013.01); G02F 1/167 (2013.01); H01L 27/322 (2013.01); H01L 51/0035 (2013.01); H01L 51/0043 (2013.01); H01L 51/0097 (2013.01); H01L 51/5253 (2013.01); B32B 2307/42 (2013.01); B32B 2307/51 (2013.01); B32B 2307/7242 (2013.01); B32B 2457/20 (2013.01); C08J 2379/08 (2013.01); H01L 2251/301 (2013.01); H01L 2251/303 (2013.01); H01L 2251/533 (2013.01); H01L 2251/5315 (2013.01); H01L 2251/5338 (2013.01);
Abstract

Provided is a display device that can be made thin, lightweight, and flexible, has no problems of cracks and peeling caused by thermal stress, and is excellent in dimension stability and the like. The display device includes: a supporting base including a polyimide film; and a gas barrier layer formed on the supporting base, in which the polyimide film has a transmittance of 80% or more in a wavelength region of from 440 nm to 780 nm, and a coefficient of thermal expansion of 15 ppm/K or less, and has a difference in coefficient of thermal expansion from the gas barrier layer of 10 ppm/K or less.

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