  We describe initial results of our program to develop and test Cd-Zn-Te (CZT)
detectors with a pixellated array readout. Our primary interest is in the
development of relatively thick CZT detectors for use in astrophysical coded
aperture telescopes with response extending over the energy range $\sim 10-600$
keV. The coded aperture imaging configuration requires only relatively large
area pixels (1-3 mm), whereas the desired high energy response requires
detector thicknesses of at least 3-5 mm. We have developed a prototype detector
employing a 10 x 10 x 5 mm CZT substrate and 4 x 4 pixel (1.5 mm each) readout
with gold metal contacts for the pixels and continuous gold contact for the
bias on the opposite detector face. This MSM contact configuration was
fabricated by RMD and tested at Harvard for uniformity, efficiency and spatial
as well as spectral resolution. We have developed an ASIC readout (IDE-VA-1)
and analysis system and report results, including $\sim 4$% (FWHM) energy
resolution at 60 keV. A prototype design for a full imaging detector array is
discussed.
