Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus

• US 8,546,050 B2
• Filed: 07/13/2011
• Issued: 10/01/2013
• Est. Priority Date: 08/27/2010
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Maruyama, Akihiro, Sekido, Kunihiko, Sekiya, Michiyo, Nagasaka, Hideaki, Takagi, Shinji
• Primary Examiner(s): RODEE, CHRISTOPHER D
• Application Number:
  US13/182,192
• Publication Number:
  US 20120052423A1
• Time in Patent Office: 811 Days
• Field of Search: 430/60, 430/63, 430/65, 399/159
• US Class Current: 430/60
• CPC Class Codes: G03G 5/0521 comprising one or more heterocyclic groups
• CPC Class Codes: G03G 5/142 Inert intermediate layers
• CPC Class Codes: G03G 5/144 comprising inorganic material

Abstract

The present invention is an electrophotographic photosensitive member including a conductive support, an intermediate layer which is placed on the conductive support, and a photosensitive layer which is placed on the intermediate layer, wherein the intermediate layer comprises a metal-oxide particle and a compound having a structure represented by the following formula (1):

Claims

1. An electrophotographic photosensitive member, comprising:

a conductive support;

an intermediate layer which is placed on the conductive support;

a photosensitive layer which is placed on the intermediate layer, and comprises a charge-generating substance and a hole-transporting substance,

wherein the intermediate layer comprises a metal-oxide particle and a compound having a structure represented by the following formula (1);

2. An electrophotographic photosensitive member according to claim 1,

wherein the photosensitive layer comprises;

a charge-generating layer comprising the charge-generating substance and

a hole-transporting layer which is placed on the charge-generating layer, and comprises the hole-transporting substance.

3. An electrophotographic photosensitive member according to claim 1,

wherein the metal-oxide particle is a particle comprising at least one metal-oxide selected from the group consisting of tin-dioxide, titanium-dioxide and zinc-oxide.

4. A process cartridge detachably attachable to a main body of an electrophotographic apparatus, wherein the process cartridge integrally supports:

the electrophotographic photosensitive member according to claim 1; and

at least one device selected from the group consisting of a charging device, a developing device, a transferring device, and a cleaning device.

5. An electrophotographic apparatus, comprising:

the electrophotographic photosensitive member according to claim 1;

a charging device;

an exposing device;

a developing device; and

a transferring device.

6. An electrophotographic photosensitive member according to claim 1,

wherein the content of the compound having a structure represented by the formula (1) is not less than 0.1% by mass and not more than 50% by mass based on the metal-oxide particles.