Patent ID: 8324556

Claim:
A radiation detector comprising (a) a radiation sensitive semiconductor layer for generating carriers upon incidence of radiation, (b) a high resistance film formed on an upper surface of the semiconductor layer for selecting and transmitting the carriers, (c) a common electrode formed on an upper surface of the high resistance film for applying a bias voltage to the high resistance film and the semiconductor layer, (d) a matrix substrate formed on a lower surface of the semiconductor layer for reading, on a pixel-by-pixel basis, the carriers generated in the semiconductor layer, (e) a barrier layer covering entire exposed surfaces of the semiconductor layer, the high resistance film and the common electrode, (f) a curable synthetic resin film covering an entire surface of the barrier layer, and (g) an insulating auxiliary plate fixed to an upper surface of the curable synthetic resin film, and having a thermal expansion coefficient comparable to that of the matrix substrate, wherein (h) the barrier layer is adhesive to the curable synthetic resin film, (i) the barrier layer inhibits a chemical reaction between the semiconductor layer and the curable synthetic resin film, and (j) the barrier layer does not chemically react with the semiconductor layer.