  Future space-based X-ray telescope missions are likely to have significantly
increased demands on detector read out rates due to increased collection area,
and there will be a desire to minimize radiation damage in the interests of
maintaining spectral resolution. While CCDs have met the requirements of past
missions, active pixel sensors are likely to be a standard choice for some
future missions due to their inherent radiation hardness and fast, flexible
read-out architecture. One form of active pixel sensor is the hybrid CMOS
sensor. In a joint program of Penn State University and Teledyne Imaging
Sensors, hybrid CMOS sensors have been developed for use as X-ray detectors.
Results of this development effort and tests of fabricated detectors will be
presented, along with potential applications for future missions.
