Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
US11112707B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 2020 |
| Grant date | Sep 7, 2021 |
| Priority date | — |
| Expiry date | Jan 17, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/1803
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The electrophotographic photosensitive member includes: a support; a charge-generating layer; and a charge-transporting layer, the charge-generating layer and the charge-transporting layer being arranged on the support, wherein a surface layer of the electrophotographic photosensitive member contains: inorganic particles having an average particle diameter (Lα) of primary particles of 5 nm or more and 50 nm or less; and resin particles having an average particle diameter (Lβ) of primary particles of 0.1 μm or more and 5.0 μm or less, and wherein in any cross-section of the surface layer, “(Smα)/(Sα)≥0.3” is satisfied, where a region within (Lβ/2) from a surface of each of the resin particles is defined as a region (M), a sum of cross-sectional areas of the inorganic particles in the any cross-section is represented by (Sα), and a sum of cross-sectional areas of the inorganic particles that are included in the region (M) is represented by (Smα).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.