Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus

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United States of America Patent

PATENT NO 11150566
APP PUB NO 20200393771A1
SERIAL NO

16891525

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Abstract

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The present disclosure provides an electrophotographic photosensitive member that can simultaneously achieve the suppression of the occurrence of the black spot in a charged portion and the suppression of the deterioration in sensitivity of an exposed portion, even after stored in a high-temperature and high-humidity environment. An electrophotographic photosensitive member includes an electro-conductive support, an undercoat layer, a charge generation layer and a charge transport layer in this order, wherein an atomic concentration ratio R of the oxygen atom to the aluminum atom on the surface of the electro-conductive support, as measured by energy dispersive X-ray spectroscopy, satisfies the following Expression (1):

description='In-line Formulae' end='lead'1.6≤R  (1)description='In-line Formulae' end='tail'

    and the undercoat layer includes a titanium oxide particle that is surface-treated with a particular silane compound.

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Patent Owner(s)

Patent OwnerAddress
CANON KABUSHIKI KAISHAJAPAN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ito, Yota Mishima, JP 40 468
Iwasaki, Shuhei Yokohama, JP 20 115
Kuno, Jumpei Yokohama, JP 27 248
Makisumi, Kohei Suntou-gun, JP 22 120
Sakakibara, Akira Susono, JP 27 428

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