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:
Jun. 01, 2021
Filed:
May. 22, 2019
Seiko Epson Corporation, Tokyo, JP;
Masaaki Aota, Suwa, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
In a wire grid polarization element where wires are arranged in parallel on one surface of the substrate, each of the wires includes in a thickness direction thereof a reflection section composed primarily of a light reflective material and an absorption section composed primarily of a light absorptive material. The reflection section includes oxygen. Between a first portion on the substrate side of the reflection section and a second portion at an edge on an opposite side the reflection section from the substrate, is provided a mixture portion (a first mixture portion) where a proportion of oxygen gradually decreases and a proportion of aluminum which is the light reflective material gradually increases from the second portion to the first portion. Thus, even when the reflection section is provided with portions having different compositions, development of an interface does not occur inside the reflection section.