We looked into the relationship between the unclear image problem and the surface free energy of an a-Si photoreceptor drum and found that the unclear image problem does not happen when low surface free energy is maintained.We succeeded in getting a low surface free energy by fluorination (a-C:H:F) using CF4 etching and achieved anti-oxidation improvement by optimizing a-C:H film deposition. Repeated steps of a-C:H film deposition and CF4 etching were applied to fluorinate deeper into the layer.As a result, an ideal drum was produced which did not cause any unclear images in tests.
Takashi Nakamura, Akihiko Ikeda, Hideaki Fukunaga, atsumi Okuda, "Development of a New Generation Surface Layer for an a-Si Photoreceptor Drum" in Proc. IS&T Int'l Conf. on Digital Printing Technologies (NIP15), 1999, pp 724 - 727, https://doi.org/10.2352/ISSN.2169-4451.1999.15.1.art00089_2