Patent attributes
There is provided an electrophotographic photosensitive member having a cylindrical shape, including a plurality of concave portions on a surface thereof,wherein a sum of opening areas of the concave portions is 5% or more and 65% or less based on a total area of a surface layer of the electrophotographic photosensitive member,an average value davg of depths of the concave portions satisfies the following Equation (1),0.4≤davg≤3.0(μm) Equation (1)a sum of opening areas of concave portions having a specific depth d is 95% or more of the sum of the opening areas of the concave portions,an average value Lavg of maximum widths of openings of the concave portions in a circumferential direction of the electrophotographic photosensitive member is 20 μm or more and 200 μm or less, andthe electrophotographic photosensitive member has at least one specific region B.
