Patent ID: 8492728

Claim:
A radiation sensor comprising: a scintillation layer configured to emit photons upon interaction with ionizing radiation; a photodetector including in order a first electrode, a photosensitive layer, and a photon-transmissive second electrode disposed in proximity to the scintillation layer; said photosensitive layer configured to generate electron-hole pairs upon interaction with a part of said photons; pixel circuitry electrically connected to the first electrode and configured to measure an imaging signal indicative of said electron-hole pairs generated in the photosensitive layer; a planarization layer disposed on the pixel circuitry between the first electrode and the pixel circuitry such that the first electrode is above a plane including the pixel circuitry; a surface of at least one of said first electrode and said second electrode at least partially overlapping the pixel circuitry and having a surface inflection above features of the pixel circuitry; and said surface inflection having a radius of curvature greater than one half micron.