Patent ID: 7276318

Claim:
An electrophotographic photosensitive member comprising a support and a photosensitive layer sensitive to a semiconductor laser light used as an exposure means, said semiconductor laser light having a wavelength of from 380 to 500 nm, wherein said photosensitive layer comprises a bisazo pigment selected from the group consisting of (i) and (ii), wherein (i) is a bisazo pigment represented by the following formula (1), wherein R 1 and R 2 each independently represent an alkyl group optionally substituted, or a halogen atom, n 1 is 1 and n 2 and n 3 are each 0, and A 1 is a group represented by the following Formula (3) or Formula (5): R 3 and R 5 are each a hydrogen atom, R 4 and R 6 are each independently a phenyl group having a sole substituent at the 3 − position thereof, said substituent being selected from the group consisting of a chlorine atom, a fluorine atom, a bromine atom, an iodine atom, a nitro group, a trifluoromethyl group, a trifluoromethoxyl group, an acetyl group and a cyano group, Z 1 and Z 2 are each an oxygen atom, and m 1 and m 2 each represent an integer of 0 to 4; and (ii) is a bisazo pigment represented by the above formula (1), wherein, R 1 and R 2 each independently represent an alkyl group optionally substituted, or a halogen atom, n 1 and n 2 are each 1 and n 3 is 0, and A 1 is a group represented by the following Formula (3) and A 2 is a group represented by the following Formula (4): wherein R 3 and R 5 are each a hydrogen atom, R 4 and R 6 are each independently a phenyl group having a sole substituent at the 3 − position thereof, said substituent being selected from the group consisting of a chlorine atom, a fluorine atom, a bromine atom, an iodine atom, a nitro group, a trifluoromethyl group, a trifluoromethoxyl group, an acetyl group and a cyano group, Z 1 and Z 2 are each an oxygen atom, and m 1 and m 2 each represent an integer of 0 to 4.