Dual active layer photoconductor

Radiant energy – Ionic separation or analysis – Static field-type ion path-bending selecting means

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357 22, 357 2312, 250211J, H01L 2714, H01L 3100, H01L 2976

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active

051032805

ABSTRACT:
A photoconductive semiconductor device having a source, a drain, and a photosensitive channel therebetween. The channel has a surface layer that is highly doped with respect to the remainder of the channel, compensating at least in part for the channel's surface depletion layer. In this manner, the photosensitivity of the device is increased without disproportionately increasing wasted dark current. In a preferred embodiment, the additional doping of the channel's surface layer is done by ion implantation, and the device is a monolith formed of gallium arsenide.

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