WE PROPOSE TO CONTINUE OUR DETECTOR DEVELOPMENT PROGRAM IN X-RAY ASTRONOMY. UNDER OUR CURRENT APRA GRANT WE HAVE FABRICATED A NEW READ OUT INTEGRATED CIRCUIT THAT IS ONE HALF OF A HYBRID CMOS DETECTOR. HERE WE PROPOSE TO BUILD AND TEST THESE INNOVATIVE DETECTORS WHICH COULD POTENTIALLY BE FLOWN ON FUTURE X-RAY MISSIONS WITH FOCUSED OPTICS AND/OR LARGE EFFECTIVE AREA. THIS PROPOSAL SUPPORTS NASA'S GOALS OF TECHNICAL ADVANCEMENT OF TECHNOLOGIES SUITABLE FOR FUTURE MISSIONS AND TRAINING OF GRADUATE STUDENTS.