Patent ID: 6183922
Filing Date: 2001-02-06
Classification: G03G

Abstract:
An electrophotographic photosensitive member comprising a support and a photosensitive layer provided thereon, said photosensitive layer being sensitive to semiconductor laser light having a wavelength of from 380 nm to 500 nm;said photosensitive layer containing an azo pigment represented by the following Formula (1):Ar.paren open-st.N.dbd.N--Cp).sub.n (1)wherein Ar represents a substituted or unsubstituted aromatic hydrocarbon cyclic group or heterocyclic group which may be bonded directly or via a linking group; Cp represents a coupler residual group represented by the following Formula (2), (3), (4) or (5); and n represents an integer of 1 to 3; provided that a plurality of --N.dbd.N--Cp moieties are not bonded to the same benzene ring; ##STR289##wherein X represents a residual group necessary for condensing with the benzene ring to form a polycyclic aromatic ring or heterocyclic ring; R.sub.1 and R.sub.2 each represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, and R.sub.1 and R.sub.2 may form a cyclic amino group via the nitrogen atom in the formula; Z.sub.1 represents an oxygen atom or a sulfur atom; and m.sub.1 represents an integer of 0 or 1; ##STR290##wherein Y represents a substituted or unsubstituted divalent aromatic hydrocarbon cyclic group or a substituted or unsubstituted divalent nitrogen-containing heterocyclic group; ##STR291##wherein R.sub.3 represents a hydrogen atom, a halogen atom, a cyano group, a carboxyl group, an alkoxycarbonyl group, a carbamoyl group or a nitro group; R.sub.4 represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group; R.sub.5 represents a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxyl group, a cyano group or a nitro group; and l represents an integer of 0 to 2, and, when l is 2, R.sub.5 's may be different groups; ##STR292##wherein R.sub.6 and R.sub.7 each represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, and R.sub.6 and R.sub.7 may form a cyclic amino group via the nitrogen atom in the formula; Z.sub.2 represents an oxygen atom or a sulfur atom; and m.sub.2 represents an integer of 0 or 1.