ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS
First Claim
1. An electrophotographic photosensitive member comprising a photosensitive layer on a support, whereinthe electrophotographic photosensitive member has 100 or more depressed portions which are independent from one another per unit area (100 μ
- m×
100 μ
m) over the whole surface of a surface layer;
where the minor axis diameter of the depressed portions is Rpc and the depth indicating the distance between the innermost part of a depressed portion and the opening surface thereof is Rdv, the depressed portions have a ratio of depth to minor axis diameter (Rdv/Rpc) of 1.0 or less; and
the photosensitive layer comprises a hole transporting material with an ionization potential of 4.5 eV or more and 5.3 eV or less.
1 Assignment
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Accused Products
Abstract
Provided is an electrophotographic photosensitive member in which friction memory does not easily occur, and a process cartridge and an electrophotographic apparatus which have the electrophotographic photosensitive member. The electrophotographic photosensitive member having a photosensitive layer has a surface layer having a plurality of depressed portions which are independent from one another, where the minor axis diameter of the depressed portions is Rpc and the depth indicating the distance between the innermost part of a depressed portion and the opening surface thereof is Rdv, the depressed portions have a ratio of depth to minor axis diameter (Rdv/Rpc) on a surface of the photosensitive member of 1.0 or less, and the photosensitive layer has a charge transporting material with an ionization potential of 4.5 eV or more and 5.3 eV or less.
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Citations
9 Claims
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1. An electrophotographic photosensitive member comprising a photosensitive layer on a support, wherein
the electrophotographic photosensitive member has 100 or more depressed portions which are independent from one another per unit area (100 μ - m×
100 μ
m) over the whole surface of a surface layer;where the minor axis diameter of the depressed portions is Rpc and the depth indicating the distance between the innermost part of a depressed portion and the opening surface thereof is Rdv, the depressed portions have a ratio of depth to minor axis diameter (Rdv/Rpc) of 1.0 or less; and the photosensitive layer comprises a hole transporting material with an ionization potential of 4.5 eV or more and 5.3 eV or less. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- m×
Specification