RADIATION DETECTOR

• Main Author: AIDA HIROYUKI
• Format: Patent
• Language: English
• Published: 23.03.2006
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; MEASUREMENT OF NUCLEAR OR X-RADIATION; MEASURING; PHYSICS; SEMICONDUCTOR DEVICES; TESTING

PROBLEM TO BE SOLVED: To provide an X-ray detector having long life by hardly allowing the corrosion between a radiation photoconductive layer and an electrode layer or between these layers and pixel electrodes. SOLUTION: On the surface of an X-ray photoconductive film 5 using lead iodide, a bias electrode layer 6 is formed using lead. When the lead corrodes in the bias electrode layer 6, the lead iodide in the X-ray photoconductive film 5 is discomposed, and dissociated iodine atoms and lead atoms in the bias electrode layer 6 are combined together to become lead iodide. Since there is no change in material before and after reaction and therefore there is no change in state of energy, corrosion hardly occurs. Even if elements in the bias electrode layer 6 are diffused in minute amounts into the X-ray photoconductive film 5, it is just that the lead in the bias electrode layer 6 is diffused into the lead iodide in the X-ray photoconductive film 5. Therefore, the elements diffused into the X-ray photoconductive film 5 has no bad influence as an impurity and never degrades the performance of the X-ray detector 1. COPYRIGHT: (C)2006,JPO&NCIPI