  We are currently investigating the spatial resolution of highly pixelated
Cadmium Zinc Telluride (CZT) detector for imaging applications. A 20 mm
{\times} 20 mm {\times} 5 mm CZT substrate was fabricated with 600 {\mu}m pitch
pixels (500 {\mu}m anode pixels with 100 {\mu}m gap) and coplanar cathode.
Charge sharing between two pixels was studied using collimated 122 keV gamma
ray source. Experiments show a resolution of 125 {\mu}m FWHM for double-pixel
charge sharing events when the 600 {\mu}m pixelated and 5 mm thick CZT detector
biased at -1000 V. In addition, we analyzed the energy response of the 600
{\mu}m pitch pixelated CZT detector.
