Photoelectric converting device and image processing apparatus u

Active solid-state devices (e.g. – transistors – solid-state diode – Responsive to non-electrical signal – Electromagnetic or particle radiation

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257 53, 257 55, H01L 31107

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057448493

ABSTRACT:
A photoelectric converting device has a photoelectric converting part which consists of a light absorbing layer of a predetermined forbidden band width Eg1 and a carrier multiplying layer, positioned in laminate structure between charge injection blocking layers. The multiplying layer is composed of a layer or plural layers with a stepback structure of the forbidden band width having a minimum width Eg2 and a maximum width Eg3 in alternate manner and showing a continuous variation therebetween in each layer. The charge injection blocking layers, light absorbing layer and carrier multiplying layer are composed of non-monocrystalline semiconductors and at least having the minimum forbidden band width Eg2 and/or the maximum forbidden band width Eg3 contain a microcrystalline structure.

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