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:
Apr. 29, 2014
Filed:
Mar. 15, 2012
Akira Uematsu, Suwa, JP;
Yoshiyuki Terashima, Matsumoto, JP;
Yoichi Sato, Suwa, JP;
Atsushi Matsuo, Tachikawa, JP;
Akira Uematsu, Suwa, JP;
Yoshiyuki Terashima, Matsumoto, JP;
Yoichi Sato, Suwa, JP;
Atsushi Matsuo, Tachikawa, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
An optical sensor includes an impurity region for a photodiode and an angle limiting filter limiting the incidence angle of incidence light incident to a light receiving area of the photodiode, which are formed on a semiconductor substrate. The angle limiting filter is formed by at least a first plug corresponding to a first insulating layer and a second plug corresponding to a second insulating layer located in an upper layer of the first insulating layer. Between the first plug and the second plug, there is a gap area having a gap space that is equal to or less than λ/2.