Patent ID: 6541172
Filing Date: 2003-04-01
Classification: G03G

Abstract:
An electrophotographic photosensitive member comprising a support portion, a charge generation layer and a charge transport layer, wherein the charge generation layer contains a phthalocyanine compound; the phthalocyanine compound is selected from the group consisting of oxytitanium phthalocyanine and hydroxygallium phthalocyanine; the charge transport layer has a thickness which is at least 9 &mgr;m but not larger than 18 &mgr;m; the charge transport layer contains polyarylate resin having repeated constitutive units represented by the following formula (1):wherein X1 represents a carbon atom or a single bond when X1 represents a single bond and R5 and R6 are not present, R1 to R4 represent a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group, R5 and R6 represent a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group, or an alyklidene group formed by combining R5 with R6, and R7 and R10 also represent a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group; and the electrophotographic photosensitive member in every 1 cm2 area has an electrostatic capacity (C) of 130 pF or more, wherein the maximum height (RmaxD) of a surface roughness of the support portion, the average roughness (Rz) of 10 points, the arithmetic average roughness (Ra), and the irregularity average interval (Sm) satisfy the following conditions: 1.2 &mgr;m&lE;RmaxD&lE;5.0 &mgr;m, 1.2 &mgr;m&lE;Rz&lE;3.0 &mgr;m, 0.15 &mgr;m&lE;Ra&lE;0.5 &mgr;m, and 30 &mgr;m<Sm&lE;80 &mgr;m.