Photosensitive member for retaining electrostatic latent images

• US 5,082,756 A
• Filed: 02/15/1990
• Issued: 01/21/1992
• Est. Priority Date: 02/16/1989
• Status: Expired due to Term

• Current Assignee: Minolta Camera Kabushiki Kaisha
• Original Assignee: Minolta Camera Kabushiki Kaisha
• Inventors: Doi, Isao
• Primary Examiner(s): Martin, Roland
• Application Number:
  US07/480,560
• Time in Patent Office: 705 Days
• Field of Search: 430/66, 430/67
• US Class Current: 430/67
• CPC Class Codes: G03G 5/02 Charge-receiving layers G03G5/153 takes precedence
• CPC Class Codes: G03G 5/14 Inert intermediate or cover layers for charge-receiving layers G03G5/04 takes precedence
• CPC Class Codes: G03G 5/14704 comprising inorganic material

Abstract

This invention relates to a photosensitive member for retaining electrostatic latent images, which comprises:

an electrically conductive substrate,

a photosensitive layer formed on the electrically conductive layer and including a photoconductive material, and

insulating and light-transmittable specks distributed on the photosensitive layer as a surface protective layer.

Claims

1. A photosensitive member for retaining electrostatic latent images, which comprises:

an electrically conductive substrate,

a photosensitive layer formed on the electrically conductive substrate and including a photoconductive material, and

electrically insulating and light-transmittable specks comprising inorganic material and distributed on the photosensitive layer as a surface protective layer, the maximal width (W) of each speck if 200 μ

m or less, and the ratio L/W of the distance (L) between each of the specks to the maximal width (W) is 1 or less.

2. A photosensitive member of claim 1, wherein the nearest distance (L) between each of the specks adjacent to each other is 200 μ

m or less.

3. A photosensitive member of claim 1, wherein the thickness of the surface protective layer composed of the distributed specks is 0.01 to 5 μ

m.

4. A photosensitive member of claim 1, wherein the speck has an electrical resistance of 10¹⁰ Ω

.cm or more.

9. A photosensitive member of claim 1, wherein the specks comprises a metallic compound selected from the group consisting of metallic oxides, metallic nitrides, metallic fluorides, metallic carbides and metallic sulfides.

10. A photosensitive member of claim 1, wherein the specks comprises amorphous silicon.

11. A photosensitive member of claim 10, wherein the amorphous silicon comprises carbon atoms.

12. A photosensitive member of claim 1, wherein the photosensitive layer comprises a photoconductive material dispersed in a binder resin.

13. A photosensitive member of claim 12, wherein the photoconductive material is an organic photoconductive compound.

14. A photosensitive member of claim 1, wherein the photosensitive layer comprises a charge generating layer and a charge transporting layer.

15. A photosensitive member of claim 1, wherein the photosensitive layer is a selenium type photosensitive layer.

16. A photosensitive member of claim 1, wherein the photosensitive layer is an amorphous silicon type photosensitive layer.

5. A photosensitive member for retaining electrostatic latent images, which comprises:

an electrically conductive substrate,

a photosensitive layer formed on the electrically conductive substrate and including a photoconductive material, and

electrically insulating and light-transmittable specks comprising amorphous hydrocarbon and distributed on the photosensitive layer as a surface protective layer, the maximal width (W) of each speck being 200 μ

m or less, and the ratio L/W of the distance (L) between each of the specks to the maximal width (W) being 1 or less.

6. A photosensitive member of claim 5, wherein the amorphous hydrocarbon contains halogen atoms.

7. A photosensitive member of claim 5, wherein the amorphous hydrocarbon contains hydrogen atoms at a content of 5-50 atomic % on the basis of the number of all atoms forming the amorphous hydrocarbon.

8. A photosensitive member of claim 5, wherein the amorphous hydrocarbon contains the elements of the group III or v of the periodic table.

17. A photosensitive member for retaining electrostatic latent images, which comprises:

an electrically conductive substrate,

a photosensitive layer formed on the electrically conductive substrate and including a photoconductive material,

a resinous layer formed on the photosensitive layer, which is composed of a resin as a main component, and

electrically insulating and light-transmittable specks comprising inorganic material and distributed on the resinous layer as a surface protective layer, the maximal width (W) of each speck is 200 μ

m or less, and the ratio L/W of the distance (L) between the maximal width (W) is 1 or less.

18. A photosensitive member of claim 17, wherein the nearest distance (L) between each of the specks adjacent to each other is 200 μ

m or less.

19. A photosensitive member of claim 17, wherein the thickness of the surface protective layer composed of the distributed specks is 0.01 to 5 μ

m.

20. A photosensitive member of claim 17, wherein the speck has an electrical resistance of 10¹⁰ Ω

.cm or more.

21. A photosensitive member of claim 17, wherein the speck comprises amorphous hydrocarbon.

22. A photosensitive member of claim 17, wherein the speck comprises a metallic compound selected from the group consisting of metallic oxides, metallic nitrides, metallic fluorides, metallic carbides and metallic sulfides.

23. A photosensitive member of claim 17, wherein the speck comprises amorphous silicon.

24. A photosensitive member of claim 17, wherein the thickness of the resinous layer is 0.01 to 5 μ

m.

25. A photosensitive member of claim 17, wherein the resinous layer comprises an electrically conductive metallic compound.

26. A photosensitive member of claim 17, wherein the photosensitive layer comprises a photoconductive material dispersed in a binder resin.

27. A photosensitive member of claim 26, wherein the photoconductive material is an organic photoconductive compound.

28. A photosensitive member of claim 17, wherein the photosensitive layer comprises a charge generating layer and a charge transporting layer.

29. A photosensitive member of claim 17, wherein the photosensitive layer is a selenium type photosensitive layer.

30. A photosensitive member of claim 17, wherein the photosensitive layer is an amorphous silicon type photosensitive layer.