Optical reader and method for its manufacture

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system

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313366, 357 2, 357 22, 357 24, 358 44, 358212, 35821311, 358293, 358294, 428209, 428192, 428457, 428688, H01J 4014

Patent

active

047541520

ABSTRACT:
An optical reading device with the least cross-talk and good reading resolution, which is constructed with a plurality of metal electrodes disposed on an insulating base plate in a spaced apart relationship for each bit, a photoconductive film provided on the plurality of metal electrodes, and a transparent electrically conductive film disposed in confrontation to the plurality of metal electrodes, wherein the photoconductive film possesses high resistance value at least at the side thereof facing the metal electrode, the transparent electrically conductive film and the photoconductive film are cut out at their portions corresponding to a positional space between adjacent metal electrodes, and the photoconductive film does not substantially protrude from the transparent electrically conductive film at a portion where the transparent electrically conductive film confronts to each of the metal electrodes.

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patent: 4567374 (1986-01-01), Takenouchi et al.
patent: 4570076 (1986-02-01), Hamano et al.
Design and Evaluation of A4 Amorphous Si Hybrid Image Sensor published in May, 1982. (pp. 132-137), T. Ozawa et al.

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