Patent ID: 7879519

Claim:
An image bearing member comprising: an electroconductive substrate; a charge generation layer; a charge transport layer; a cross-linking surface protective layer formed by curing at least a monomer having at least three radical polymerizable functional groups without a charge transport structure and a monomer having one radical polymerizable functional group with a charge transport structure, wherein a ratio (t 1 /t 2 ) of a layer thickness (t 1 ) of the cross linking surface protective layer to a layer thickness (t 2 ) of the charge transport layer is from 0.7 to 1.3 and wherein the charge transport layer comprises a compound represented by chemical formula I: where R 1 to R 4 independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or a phenyl group optionally substituted by an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, A represents a substituted or non-substituted arylene group or a compound represented by chemical formula II where R 5 , R 6 and R 7 independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or a phenyl group optionally substituted by an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, B represents a substituted or non-substituted aryl group or a compound represented by Chemical formula III: wherein Ar 1 represents an arylene group optionally by an alkyl group or alkoxy group having 1 to 4 carbon atoms, Ar 2 and Ar 3 independently represent an aryl group optionally substituted by an alkyl group or alkoxy group having 1 to 4 carbon atoms, and C is a carbon atom.