Developing roller, process cartridge, and electrophotographic image forming apparatus
US8503916B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2010 |
| Grant date | Aug 6, 2013 |
| Priority date | — |
| Expiry date | Dec 21, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0818
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention can provide a developing roller which can form a stable image in wide ranging environments from a low temperature/low humidity environment to a high temperature/high humidity environment. The developing roller includes a surface layer including a silicon oxide film containing at least a carbon atom chemically bonded to a silicon atom, an oxygen atom chemically bonded to a silicon atom, and a fluorine atom chemically bonded to a silicon atom and/or a carbon atom. The silicon oxide film has an abundance ratio of the fluorine atom to the silicon atom (F/Si), an abundance ratio of the oxygen atom forming a chemical bond to the silicon atom to the silicon atom (O/Si), and an abundance ratio of the carbon atom forming a chemical bond to the silicon atom to the silicon atom (C/Si) have values in particular ranges, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.