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Chang, E.,Kweon, J.J.,Park, J.K.,Han, J.H.,Choi, E.H.,Lee, C.E. Elsevier 2014 Current Applied Physics Vol.14 No.5
We have studied the charge transport and dielectric properties of KH<SUB>2</SUB>PO<SUB>4</SUB> (KDP) single crystals, irradiated by proton beams with high energies up to 20 MeV, by means of the temperature-dependent electrical conductivity and dielectric constant measurements. It is shown that the electrical conductivity and the electric dipole moment may be sensitively controlled by the proton irradiation energy and dose. The activation energy and the dipole moment were shown to be strongly correlated.
High-energy proton-irradiation effects on the charge transport and electric dipole moment of KH2PO4
장은혜,권진중,박준규,한준희,E. H. Choi,이철의 한국물리학회 2014 Current Applied Physics Vol.14 No.5
We have studied the charge transport and dielectric properties of KH2PO4 (KDP) single crystals, irradiated by proton beams with high energies up to 20 MeV, by means of the temperature-dependent electrical conductivity and dielectric constant measurements. It is shown that the electrical conductivity and the electric dipole moment may be sensitively controlled by the proton irradiation energy and dose. The activation energy and the dipole moment were shown to be strongly correlated.
차세대 반도체 소자용 세라믹 박막의 전기적 분석 방법 리뷰
이동현(Donghyun Lee),양건(Kun Yang),박주용(Ju-Yong Park),박민혁(Min Hyuk Park) 한국세라믹학회 2019 세라미스트 Vol.22 No.4
Ceramic thin films are key materials for fundamental electronic devices such as transistors and capacitors which are highly important for the state-of-the-art electronic products. Their characteristic dielectric properties enable accurate control of current conduction through channel of transistors and stored charges in capacitor electrodes. The electronic conduction in ceramic thin films is one of the most important part to understand the electrical properties of electronic device based on ceramic thin films. There have been numerous papers dealing with the electronic conduction mechanisms in emerging ceramic thin films for future electronic devices, but these studies have been rarely reviewed. Another interesting electrical characterization technique is one based on electrical pulses and following transient responses, which can be used to examine physical and chemical changes in ceramic thin films. In this review, studies on various conduction mechanisms through ceramic thin films and electrical characterization based on electric pulses are comprehensively reviewed.
우동찬,이희영,구창영,마홍찬 한국전기전자재료학회 2012 Transactions on Electrical and Electronic Material Vol.13 No.5
Antimony doped tin oxide (ATO) thin films on glass substrate were prepared by the chemical solution deposition (CSD) method, using sol-gel solution synthesized by non-alkoxide precursors and the sol-gel route. The crystallinity and electrical properties of ATO thin films were investigated as a function of the annealing condition (both annealing environments and temperatures), and antimony (Sb) doping concentration. Electrical resistivity, carrier concentration, Hall mobility and optical transmittance of ATO thin films were improved by Sb doping up to 5~8 mol%and annealing in a low vacuum atmosphere, compared to the undoped tin oxide counterpart. 5 mol% Sb doped ATO film annealed at 550℃ in a low vacuum atmosphere showed the highest electrical properties, with electrical resistivity of about 8~10 × 10-3 Ω·cm, and optical transmittance of ~85% in the visible range. Our research demonstrates the feasibility of low-cost solution-processed transparent conductive oxide thin films, by controlling the appropriate doping concentration and annealing conditions.
Woo, Dong-Chan,Koo, Chang-Young,Ma, Hong-Chan,Lee, Hee-Young The Korean Institute of Electrical and Electronic 2012 Transactions on Electrical and Electronic Material Vol.13 No.5
Antimony doped tin oxide (ATO) thin films on glass substrate were prepared by the chemical solution deposition (CSD) method, using sol-gel solution synthesized by non-alkoxide precursors and the sol-gel route. The crystallinity and electrical properties of ATO thin films were investigated as a function of the annealing condition (both annealing environments and temperatures), and antimony (Sb) doping concentration. Electrical resistivity, carrier concentration, Hall mobility and optical transmittance of ATO thin films were improved by Sb doping up to 5~8 mol% and annealing in a low vacuum atmosphere, compared to the undoped tin oxide counterpart. 5 mol% Sb doped ATO film annealed at $550^{\circ}C$ in a low vacuum atmosphere showed the highest electrical properties, with electrical resistivity of about $8{\sim}10{\times}10^{-3}{\Omega}{\cdot}cm$, and optical transmittance of ~85% in the visible range. Our research demonstrates the feasibility of low-cost solution-processed transparent conductive oxide thin films, by controlling the appropriate doping concentration and annealing conditions.
Formulation of the Sucrose-Free Simulant Human Tissue for SAR Measurement at CDMA Mobile Band
Yoon-Myoung Gimm 한국전자파학회JEES 2007 Journal of Electromagnetic Engineering and Science Vol.7 No.2
A general method to formulate the tissue-equivalent liquids for SAR measurement is proposed to make sucrose-free brain tissue applicable at 835 MHz as an example. We suggest the tissue composition can be determined by measuring the dielectric constants and conductivities with the DI water and salt addition variation to the pre-manufactured auxiliary liquid of DGBE and TritonX-100. The manufactured liquid satisfies the specified electrical parameters of international standard at 835 ㎒.
전성준,홍상범,허순도,이정훈,강정호,황희진,정지웅,정혜진,한창희,홍성민 한국해양과학기술원 2014 Ocean and Polar Research Vol.36 No.1
We established the first complete ice core processing method and analytical procedures for fundamental proxies, using a 40.2 m long ice core drilled on the Mt. Tsambagarav glacier in the Mongolian Altai mountains in July 2008. The whole core was first divided into two sub ice core sections and the measurements of the visual stratigraphy and electrical conductivity were performed on the surface of these sub core sections. A continuous sequence of samples was then prepared for chemical analyses (stable isotope ratios of oxygen (18O/16O) and hydrogen (2H/1H), soluble ions and trace elements). A total of 29 insoluble dust layers were identified from the measurement of visual stratigraphy. The electrical conductivity measurement (ECM) shows 11 peaks with the current more than 0.8 μA. Comparing the profiles of SO4 2− and Cl− concentrations to correlate with known volcanic eruptions, the first two ECM peaks appear to be linked to the eruptions (January and June 2007) of Kliuchevskoi volcano on the Kamchatka Peninsula of Russia, which supports the reliability of our ECM data. Finally, the composition of stable isotopes (δ18O and δD) shows a well-defined seasonal variation, suggesting that various chemical proxies may have been well preserved in the successive ice layers of Tsambagarav ice core. Our ice core processing method and analytical procedures for fundamental proxies are expected to be used for paleoclimate and paleoenvironmental studies from polar and alpine ice cores.