TAPER PUMICE FIXTURE
Original Publication Date: 1991-Jun-30
Included in the Prior Art Database: 2004-Apr-05
Xerox Disclosure Journal
A taper pumice fixture that automatically removes various thicknesses of alloy photoreceptor surfaces is disclosed. Multilayered alloy photoreceptors may exhibit discrete residual voltage buildup resulting from electrons being injected into film structures from various machine components. For example, negative DC or AC corotron devices whose wires may be contaminated at discrete sites may cause spots where high injection/trapping levels occur. Once an electron is injected it may be trapped within a film layer and subsequently trap electron holes that are created by the photogeneration process. The taper pumice fixture provides for controlled mechanical abrasive removal of top, middle and base layers of alloy layer materials of the photoreceptor that have been previously evaporated onto substrate materials. The taper pumice fixture is comprised of two stepper motors to advance the sample to and fro; a fixed smooth pad surface to which abrasive is periodically added, for contacting the sample; and a controller to regulate the rate at which alloy layer material is removed. The controlled and stepwise removal of coated materials from photoreceptors allows for detailed analysis of charge trapping phenomena and mechanisms in layered alloy photoreceptor devices. The analysis results are more consistent than those results obtained from samples prepared manually.