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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 11101422 B1

PDFFull Text
Date of Patent:
Aug. 24, 2021

Filed:

Jul. 14, 2017

Pyroelectric infrared sensor device

Applicant:

Tokin Corporation, Sendai, JP;

Inventors:

Shigemi Fujiwara, Sendai, JP;

Makoto Kaneko, Sendai, JP;

Masahiro Saito, Sendai, JP;

Assignee:

TOKIN CORPORATION, Sendai, JP;

Attorney:

Snyder, Clark, Lesch & Chung, LLP

Primary Examiner:

David P Porta

Assistant Examiner:

Mamadou Faye

Int. Cl.
CPC ...
G01J 5/04 (2006.01); H01L 37/02 (2006.01); G01J 5/02 (2006.01); G01J 5/08 (2006.01); G01J 5/00 (2006.01); G01J 5/34 (2006.01); H04N 1/00 (2006.01); G01J 5/06 (2006.01);
U.S. Cl.
CPC ...
H01L 37/02 (2013.01); G01J 5/0022 (2013.01); G01J 5/0205 (2013.01); G01J 5/04 (2013.01); G01J 5/046 (2013.01); G01J 5/047 (2013.01); G01J 5/0803 (2013.01); G01J 5/089 (2013.01); G01J 5/34 (2013.01); H04N 1/00323 (2013.01); G01J 2005/066 (2013.01);
Abstract

A pyroelectric infrared sensor device comprising: a pyroelectric infrared sensor part (); and a cover member (). The pyroelectric infrared sensor part comprises: a pyroelectric element (); a housing () that the pyroelectric element is placed inside of and comprises an opening at a position facing a light receiving surface of the pyroelectric element; and an infrared transmission filter () that is located to cover the opening of the housing. The cover member covers at least a top surface of the pyroelectric infrared sensor part. The infrared transmission filter transmits light equal to or greater than a wavelength of 1 μm. The cover member has a property that a transmittance of infrared light having a wavelength of from 3 μm to 5.5 μm is equal to or greater than 10% and has a uniform material quality in an area corresponding to the top surface of the pyroelectric infrared sensor part.

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