- Patent Title: Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus, and chlorogallium phthalocyanine crystal and method for producing the same
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Application No.: US14920644Application Date: 2015-10-22
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Publication No.: US09720337B2Publication Date: 2017-08-01
- Inventor: Tsutomu Nishida , Masato Tanaka , Masataka Kawahara
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Canon U.S.A., Inc. IP Division
- Priority: JP2014-220751 20141029
- Main IPC: G03G15/00
- IPC: G03G15/00 ; G03G5/047 ; G03G5/06 ; C09B47/04

Abstract:
An electrophotographic photosensitive member includes a support and a photosensitive layer in this order. The photosensitive layer contains a chlorogallium phthalocyanine crystal. The chlorogallium phthalocyanine crystal has one or more peaks in each of a wavelength range of 646 nm or more and 668 nm or less and a wavelength range of 782 nm or more and 809 nm or less in an absorption spectrum. When a peak with a maximum absorbance among the peaks in the wavelength range of 646 nm or more and 668 nm or less is assumed to be a first peak and a peak with a maximum absorbance among the peaks in the wavelength range of 782 nm or more and 809 nm or less is assumed to be a second peak, an absorbance of the first peak is larger than an absorbance of the second peak.
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