Amorphous Silicon (a-Si) Photoreceptor

<<Amorphous Silicon (a-Si) Photoreceptor Drums
Q1: What indicates the end of a photoconductive material's service life?
A1: A photoconductive material has reached the end of its service life when friction begins to cause wear on the surface, deteriorating the material's characteristics and reducing print performance. Kyocera's amorphous-silicon (a-Si) imaging drum has a very hard surface protection layer, which limits wear to a level less than half a micron after printing three million sheets.
Q2: Is the photoreceptor recyclable?
A2: The aluminum substrate is recyclable as secondary alloy material. The layer is nontoxic, so there is no special handling required when disposing of it.
Q3: Is it possible to order custom design drums that are not in the standard lineup?
A3: Yes. Since the a-Si drum is custom made, customers can specify size, layer specifications (characteristics), and shipping configuration. While there may be some specifications we cannot comply with, please don't hesitate to consult with us regarding your specific requirements.
Q4: Can a-Si photoreceptor be produced in belt form?
A4: With an a-Si semiconductor, the application of extreme pressure can cause the layer network to break, resulting in a loss of semiconductive characteristics. Moreover, the layer thickness of standard a-Si drums is over 10μm, therefore belt configuration is not possible at this point.
Q5: Can materials other than aluminum be used for the substrate?
A5: Though aluminum is the ideal substrate material from the viewpoint of layer adhesion, please feel free to contact Kyocera concerning specific inquiries about using other materials.
Q6: Is there anything in particular I need to be careful about when storing?
A6: The material of the drums is resistant to normal room light, but it can deteriorate in sunlight, so it is necessary to avoid placing the drums near windows or other, brightly lit places.
Q7: How should the photoreceptor be cleaned when the surface layer becomes dirty?
A7: Wipe the surface with a soft wash cloth. For oily stains, it is alright to clean with organic solvents.
Q8: What should be considered when selecting an exposure wavelength?
A8: There is a phenomenon where the previously printed pattern lightly appears on the graphic of the next rotation, which is called an image memory (also known as a residual image or the ghost phenomenon). This is caused when part of the carriers generated by the exposed portion are trapped inside the layer, so they cannot reach the outer surface before the next process. As the wavelength of the light gets longer, the light goes into the drum deeper, and causes the phenomenon more frequently. In order to avoid this issue, choose visible light with a comparatively short wavelength.
Q9: Does Kyocera provide exposure devices designed for the a-Si drums?
A9: Kyocera provides the SLH Series of LED exposure devices designed for the a-Si photoreceptor drums and suited for ultra-high-speed printing machines.
Q10: Once an image is exposed and printed, how is it erased?
A10: To erase images properly with less generation of image memory, we recommend selecting a wavelength that is close to, but actually slightly shorter than, the exposure wavelength.

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a-Si Photoreceptor Drums

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