期刊
JOURNAL OF CRYSTAL GROWTH
卷 225, 期 2-4, 页码 118-123出版社
ELSEVIER
DOI: 10.1016/S0022-0248(01)00832-6
关键词
physical vapor deposition processes; polycrystalline deposition; semiconducting mercury compounds
Polycrystalline HgI2 thick film detectors are among the leading semiconductor materials to be used as direct converters in X-ray digital radiography. Their properties along with a survey of the properties of alternative materials, such as PbI2 or A-Se, will be given. The preparation of HgI detector plates, both by direct evaporation (Physical vapor deposition, (PVD)) and by binding the individual crystallites with polymeric glue, forming screen-printed (SP) detector plates, will be described. The microstructure of the PVD thick films showing a columnar morphology, as determined by SEM measurements, will be shown. The X-ray response to radiological X-ray generator of 85 kVp using the current integration mode will be reported for both PVD and SP films. Finally, some X-ray images taken at Xerox-Parc using HgI, polycrystalline detectors will be shown. (C) 2001 Elsevier Science B.V. All rights reserved.
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