X‐ray detectors which register the position of photon arrival are widely used. Parameters for the characterization and compression of detectors are reviewed prior to a survey of the types of available area x‐ray detectors. Research opportunities for improvement of existing systems and development of new detectors are numerous. Potential x‐ray projects involving adaptation of detectors employed at infrared and visible wavelengths are suggested. The development and characterization of x‐ray detectors is a field full of both intellectual challenges and practical applications.