Pixel detector and method of manufacture and assembly thereof

A method for fabricating a detector (50) having a plurality of pixels (13) each including a sensor element (14) coupled to a sensor input of an electronic processing circuit (16), the method comprising:

• integrating the electronic processing circuits on a CMOS wafer by stitching a plurality of reticles (26, 27, 28) of at least two different types so as to form an integrated circuit having an array of electronic processing circuits each having a respective sensor input disposed toward a first surface of the wafer and accessible from the first surface via a contact formed near an edge of the integrated circuit;
• and
• disposing the sensor elements (56) on the first surface of the respective integrated circuits in said detector whereby an exposed surface of the sensor elements forms a common first electrode towards which incident photons are directed, and an opposite unexposed surface thereof forms multiple second electrodes of opposite polarity to the first electrode each in registration with a corresponding sensor input.