Invention Grant
- Patent Title: Light-absorbing composition and optical filter
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Application No.: US16349527Application Date: 2017-11-13
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Publication No.: US11300719B2Publication Date: 2022-04-12
- Inventor: Yuichiro Kubo , Katsuhide Shimmo
- Applicant: Nippon Sheet Glass Company, Limited
- Applicant Address: JP Tokyo
- Assignee: Nippon Sheet Glass Company, Limited
- Current Assignee: Nippon Sheet Glass Company, Limited
- Current Assignee Address: JP Tokyo
- Agency: Hamre, Schumann, Mueller & Larson, P.C.
- Priority: JPJP2016-221950 20161114
- International Application: PCT/JP2017/040819 WO 20171113
- International Announcement: WO2018/088561 WO 20180517
- Main IPC: G02B5/22
- IPC: G02B5/22 ; C07F9/38 ; G02B5/20 ; G03F7/00 ; C07F9/28 ; C07F9/02 ; H01L27/146

Abstract:
A light-absorbing composition includes: a light absorber formed by a phosphonic acid represented by the following formula (a) and copper ion, the light absorber being dispersed in the light-absorbing composition; a phosphoric acid ester allowing the light absorber to be dispersed; and a curable resin. When the light-absorbing composition is applied and cured on one principal surface of a transparent dielectric substrate to form a laminate consisting of a light-absorbing layer being a cured product of the light-absorbing composition and the transparent dielectric substrate, the laminate satisfies predetermined requirements.
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