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. 02, 2021
Filed:
Oct. 06, 2016
Konica Minolta, Inc., Tokyo, JP;
Yoichi Saito, Hino, JP;
KONICA MINOLTA, INC., Tokyo, JP;
Abstract
An optical reflection film may include an optical interference film formed by alternately laminating a high refractive index layer and a low refractive index layer with a refractive index difference therebetween on a substrate. Among the high refractive index layers and the low refractive index layers constituting the optical interference film, if a layer disposed closest to the substrate is defined as a lowermost layer, a layer farthest from the substrate is defined as an uppermost layer, and each of layers disposed between the lowermost layer and the uppermost layer is defined as an intermediate layer, the average elastic modulus of the intermediate layers measured by a nano-indentation method is higher than the elastic modulus of the uppermost layer by 2 GPa or more, and the film thickness of the uppermost layer is 1.2 to 7 times the average film thickness of the intermediate layers.