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KMID : 1151820140080070429
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Journal of the Korean Society of Radiology
2014 Volume.8 No. 7 p.429 ~ p.433
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The Evaluation of the Thick Polycrystalline HgO and PbO Films Derived by Particle Sedimentation Method for the Mammographic Application
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Noh Si-Cheol
Park Ji-Koon
Choi Il-Hong
Jung Hyung-Jjn
Kang Sang-Sik
Joeng Bong-Jae
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Abstract
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In this study, the morphology and the x-ray quantum efficient of mercury oxide (HgO) and lead oxide (PbO) sensors derived by particle sedimentation method were discussed. In the pursuit of this purpose, we investigated the electrical characteristics and the x-ray quantum efficiency of various thicknesses of HgO and PbO films in mammographic x-ray energy. We have therefore developed a particle-in-binder sedimentation method of fabricating large area polycrystalline films onto transparent glass substrates coated with indium tin oxide. We are currently optimizing the growth method to improve the quantum efficiency with the ultimate goal of obtaining as quantum efficiency close to that of single crystal performance. Our future efforts will concentrate on optimization of large area film growth techniques specifically for deposition on a-Si:H flat panel readout arrays.
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KEYWORD
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mercury oxide, lead oxide, x-ray quantum efficient, mammographic application
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