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The Modified Horizontal Bridgman (MHB) process produces Cadmium ZincTelluride (CZT) crystals with high yield and excellent homogeneity. Variousgroups,including our own, previously reported on the test of 2x2x0.5 cm3 MHBCZT detectors grown by the company Orbotech and read out with 8x8 pixels. Inthis contribution, we describe the optimization of the photolithographicprocess used for contacting the CZT detector with pixel contacts. The optimizedprocess gives a high yield of good pixels down to pixel diameters/pitches of 50microns. Furthermore, we discuss the performance of 0.5 cm and 0.75 cm thickdetectors contacted with 64 and 225 pixel read out with the RENA-3 ASICs fromthe company NOVA R&D.

Test of CZT Detectors with Different Pixel Pitches and Thicknesses