Abstract
Deposition, characterization, fabrication and performance of gas microstrip detectors (GMDs) using CdZnTe thin films to control surface resistivity are reported. CdZnTe thin films deposited on glass or on flexible plastic substrates are attractive for GMDs since CdZnTe bulk resistivity varies in the range 10/sup 9/ to 10/sup 11/ ohm-cm and CdZnTe films with good uniformity can be deposited over large areas using inexpensive deposition techniques. Metalorganic chemical vapor deposition was used to form CdZnTe thin films on glass and flexible plastic substrates. The sheet resistance for 1 /spl mu/m thick CdZnTe film on glass varied in the range 10/sup 11/ to 10/sup 13/ ohm/square depending on the growth conditions. GMDs were fabricated using CdZnTe films deposited on glass substrates and tested for energy response to /sup 55/Fe X-rays. The well-resolved peaks (5.9 keV X-ray and 2.9 keV escape peak) clearly show the ability to successfully fabricate CdZnTe thin films on GMDs.
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