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:
Sep. 07, 2021
Filed:
Jul. 30, 2019
Dexerials Corporation, Tokyo, JP;
Kazuyuki Shibuya, Osaki, JP;
Shigeshi Sakakibara, Tome, JP;
Toshiaki Sugawara, Sendai, JP;
Yusuke Matsuno, Tome, JP;
Akio Takada, Sendai, JP;
Dexerials Corporation, Tokyo, JP;
Abstract
Provided is a polarizing plate that is a polarizing plate having a wire grid structure, and includes a transparent substrate and a plurality of protrusions that extend in a first direction on the transparent substrate and are periodically arranged at a pitch shorter than a wavelength of light in a use band. Each of the protrusions includes a reflective layer, a multilayer film, and an optical property improving layer located between the reflective layer and the multilayer film. The optical property improving layer contains an oxide that contains a constituent element of which the reflective layer is composed. An etching rate of the optical property improving layer with respect to a chlorine-based gas is no less than 6.7 times and no more than 15 times an etching rate of the multilayer film.