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:
Dec. 05, 2023
Filed:
Oct. 25, 2018
Applicant:
Mitsubishi Materials Electronic Chemicals Co., Ltd., Akita, JP;
Inventors:
Takashi Konishi, Akita, JP;
Kensuke Kageyama, Akita, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 1/00 (2006.01); B22F 9/22 (2006.01); C01B 21/076 (2006.01); G03F 7/004 (2006.01); C22C 32/00 (2006.01); G02B 1/10 (2015.01); G02B 5/00 (2006.01);
U.S. Cl.
CPC ...
G02B 1/00 (2013.01); B22F 9/22 (2013.01); C01B 21/076 (2013.01); C22C 32/0005 (2013.01); G03F 7/0042 (2013.01); G03F 7/0045 (2013.01); B22F 2201/016 (2013.01); B22F 2201/02 (2013.01); B22F 2201/10 (2013.01); B22F 2302/20 (2013.01); G02B 1/10 (2013.01); G02B 5/003 (2013.01);
Abstract
The present invention provides a powder for forming a black light-shielding film having a specific surface area of 20 to 90 m/g, which is measured by the BET method, comprising zirconium nitride as a main component, and containing magnesium and/or aluminum. If containing the magnesium, the content of the magnesium is 0.01 to 1.0% by mass relative to 100% by mass of the powder for forming a black light-shielding film, and if containing the aluminum, the content of the aluminum is 0.01 to 1.0% by mass relative to 100% by mass of the powder for forming the black light-shielding film.