| 摘要 |
PURPOSE:To enable to read out a book due to flat contacting surface of an original without damage due to hard contacting surface of the original by forming a transparent wear resistant protective film on one side of a transparent inorganic material substrate which is thinner than the pitch of a photoreceptor, and forming the photoreceptor formed of an amorphous thin film on the opposite side surface. CONSTITUTION:A transparent wear resistant protective film 23 of BN, BNC, SiC having approx. 10-0.1mum of thickness is formed in close contact on a transparent inorganic materials substrate 22 having 250mum or less of thickness, and a plurality of transparent electrodes 24 of ITO, SnO2 are arranged in one-dimensional array on the opposite side surface. An amorphous semiconductor thin films 25 having a PIN junction is formed thereon, separated into a plurality by etching, ohmically contacted with an N-type layer, and metal electrodes 27 having a transparent window 26 are provided to construct a photodiode array to become a photoreceptor. Since an original 37 moves directly in contact with the film 23 and the substrate has 250mum or less of thickness, the light emitted from an LED chip 34 has less diffusion to improve the illumination of a reader of the original 37, to enhance the sensitivity of the photoreceptor and to accelerate the responding velocity. |
