Radiant energy – Invisible radiant energy responsive electric signalling – Semiconductor system
Patent
1991-08-19
1993-05-18
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
Semiconductor system
25037007, H01L 3106, H01L 31118, G01T 116
Patent
active
052123855
ABSTRACT:
A radiation detector element which is optimized for the detection of .alpha. particles comprises a layer of diamond or diamond-like carbon with first and second electrical contacts applied to the surface of the layer. The layer is formed on a silicon substrate, together with an electronic circuit. Each of the contacts defines a rectifying junction with the layer, thus defining a back-to-back diodic structure, having junction characteristics which are responsive to the intensity of radiation incident on the detector element. The electronic circuit is powered by a battery or a solar cell, and activates an LCD indicator if the intensity of the incident radiation exceeds a predetermined level. The radiation detector element and the electronic circuit are housed on a card which is sized similarly to a conventional identification card.
REFERENCES:
patent: 5097133 (1992-03-01), Nam et al.
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