Patent ID: RE43948

Claim:
A method of manufacturing a radiation detector having one or more conductive contacts on a semiconductor substrate, the one or more conductive contacts having respective contact positions, the method including the steps of: forming a layer of photoresist material on a first surface of the semiconductor substrate; removing said photoresist material from areas corresponding to said contact positions to expose said first surface of the semiconductor substrate surface; applying a first conductive layer to a on remaining photoresist material and on said exposed first surface of the semiconductor substrate; applying a second conductive layer to form a plurality of contiguous layers of conductive materials on remaining photoresist material and on said exposed first surface of the semiconductor substrate , said plurality of contiguous layers including said first conductive layer; selectively removing parts of said plurality of contiguous layers overlying said remaining photoresist material by removing said remaining photoresist material so as to form from remaining conductive material said conductive contacts, the conductive contacts defining one or more radiation detector cells in the semiconductor substrate , wherein each conductive contact comprises a first surface adjacent the semiconductor substrate, and a second, exposed surface ; and forming a layer of passivation material on said exposed surfaces of the conductive contacts and the regions around between said conductive contacts; forming a further layer of photoresist material over said passivation layer; removing portions of the further photoresist layer to expose portions of the passivation material overlying said conductive contacts; and removing , using a passivation etchant, portions of said passivation material overlying said conductive contacts to expose the conductive contacts , such that the passivation material remains in the regions between said conductive contacts; and removing remaining further photoresist material .