Patent Number: 
Section: claims

1. A radiation detector comprising:a sensor substrate including an organic material as a main component;a resin protective layer formed on the sensor substrate and made of an organic material;a barrier layer formed on the resin protective layer and including thallium iodide as a main component; anda scintillator layer formed on the barrier layer and constituted of a plurality of columnar crystals including cesium iodide with thallium added thereto as a main component,wherein the sensor substrate has a photo-detection surface provided with a photoelectric conversion element receiving light generated in the scintillator layer. 2. The radiation detector according to claim 1,wherein the organic material included in the sensor substrate as a main component is any one of polyethylene terephthalate (PET), polyethylene naphthalate (PEN) and polyimide (PI). 3. The radiation detector according to claim 1,wherein the organic material forming the resin protective layer includes any one of a xylylene resin, an acrylic resin, a silicone resin, polyimide, a polyester resin, a siloxane resin and an epoxy resin. 4. The radiation detector according to claim 1, further comprising:a protective film covering a front surface of the resin protective layer, side surfaces of the scintillator layer and a front surface of the scintillator layer. 5. The radiation detector according to claim 4,wherein the protective film is formed by polyparaxylylene.