Electroless gold patterning of CdZnTe crystals for radiation detection by scanning pipette technique

Recently some of the authors have proposed a new technique to deposit contacts on CdZnTe detectors that combines the standard electroless procedure and the scanning pipette technique. In this work it is shown that by using a 15 micron inner diameter alumina pipette it is possible to deposit gold dots, pixels and micro-stripes without using the standard photolithographic process. Moreover, it is shown that the performances in terms of charge collection efficiency and energy resolution of detectors prepared with the scanning pipette technique are similar to the ones of detectors prepared with the standard electroless procedure. Recently a new technique to deposit contacts on CZT detectors that combines standard electroless procedure and scanning pipette technique was proposed. This work shows that by using a micro-pipette is possible to deposit gold dots, pixels and micro-stripes without using photolithographic process. Moreover, it shows that performances, in terms of charge collection efficiency and energy resolution, of detectors prepared with this technique are similar to the ones prepared with standard procedure. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.