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KMID : 1151820090030020011
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Journal of the Korean Society of Radiology
2009 Volume.3 No. 2 p.11 ~ p.16
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The study of X-ray detection characteristic and fabrication photoconductor film thickness for Screen printing method
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Lee Young-Kyu
Yoon Min-Seok
Kim Dong-Hyeuk
Chun Song-I
Jeong Bok-Dong
Kang Sang-Sik
Park Ji-Koon
Mun Chi-Woong
Nam Sang-Hee
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Abstract
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Mercury Iodide as good sensitivity at radiation and has an easy peculiarity that operates at low voltage for other photoconductors(a-Se, a-Si, Ge, etc) Based on this characteristic, we studied about an efficiency of the digital x-ray detector in acccordance with the thickness of photoconductor. To solve the problem that is difficult to make a large area film using PVD(Physical Vapor Deposition)method, we used a PIB(Particle In Binder)method. To make a binder paste, we used a PVB(Polyvinylbutyral) as a binder and a DGME(Diethylene Glycol Monobutyl Ether), DGMEA(Diethylene Glycol Monobutyl Ether Acetate) as a solvent. Using this binder paste, we made a polycrystal mercury iodide film that has an each thickness. To evaluate the electrical properties of this films, we measured a darkcurrent, sensitivity and SNR(Signal to Noise Ratio). Mercury iodide film of the 200um thickness has good electrical properties as a result of the measurement. From this result there is a good chance that replace the existing a-Se(Amnorphous seleinum; a-se) with the mercury iodide.
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KEYWORD
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HgI2, Screen printing, thickness, a-Se
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