• Proceedings of the Korean Vacuum Society Conference
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• 2009.08a
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• pp.364-364
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• 2009

• Proceedings of the Korean Ceranic Society Conference
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• 2003.04a
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• pp.187.1-187
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• 2003

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.05a
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• pp.529-530
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• 2017

Electrical coupling of monolithic 3D inverter(M3D-INV) consisting of Junctionless FET(JLFET) was investigated. Depending on the thickness of Inter Layer Dielectirc (ILD) between top and bottom JLFETs, $N_{gate}-N_{gate}$ capacitance and transconductance $g_m$ are changed by the gate voltage of bottom JLFET. Therefore, when using a stacked structure with the ILD below tens nm, AC electrical coupling between two transistors in M3D-INV should be considered.

• Journal of the Korea Society of Computer and Information
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• v.26 no.2
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• pp.53-60
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• 2021

In this paper, we aimed to identify the insulation characteristics and reliability of Epoxy composites, which are widely used as insulation material for electrical & electronic components and electric appliance. To this end, it was necessary to predict variations of electric field due to the distribution of fillers that must be added by economic and mechanical factors. So, we verified the result using an electric field analysis Simulator. Furthermore, under the condtion of DC voltage application, an dielectirc breakdown test was performed according to ambient temperature changes and the distribution of fillers, and the changes were observed. Three types of specimens were manufactured by adding 0, 50 and 100[phr] filling to Epoxy resin. In all specimens, as temperature was increased, the strength of the dielectric strength was decreased. When comparing the simulation results with the actual dielectric breakdown test results, we was able to confirm the technical applicability required for Insulation design of electric appliance.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2006.11a
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• pp.463-463
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• 2006

Nowadays, subminiature lens actuators are being developed with the demand of AF lens for high performance of the mobile phone camera. Though the VCM is the current, development of new types of actuators are needed due to the structural problem and etc.. A new type of actuator for AF lens using Dielectric Elastomer Electroactive Polymer(EAP) is proposed in this paper, DE EAP has advantages in its weight, ease of fabrication and low power consumption. The mathematical model is obtained by Hamilton's principle and verified by finite element analysis and experiments. The controller is designed and evaluated by experiments.

• Proceedings of the KIEE Conference
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• 2000.11c
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• pp.597-599
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• 2000

In this paper, Dielectirc waveguides have been calculated using the vector finite element method. This method is introduced that allows propagation constants and electric field distribution to be computed directly. In order to obtain more accurate solutions, Second order vector elements are proposed.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2002.05c
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• pp.53-57
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• 2002

Reduction of insulation thickness would be beneficial not only for increasing the cable length but would also improve its thermal performance. An interfacial diffusion method was devised to reduce insulation thickness by improving the interfacial properties of XLPE cable insulation. In this paper, to evaluate superficially the interface properties between XLPE insulation and semiconducting layer, the dielectric and insulation properties of tan${\delta}$ and volume resistance were measured with temperature dependence. Above the results, dielectirc and insulation properties with semiconductor/XLPE were more anormal than its bulk caused by the interfacial properties.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2006.05a
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• pp.136-139
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• 2006

최근 전력수요의 급증과 더불어 기기의 소형화와 경랑화를 위해 고분자절연재료의 사용이 증가하였으며, 근래 들어 환경성의 문제가 거론되면서 반영구적인 절연재료의 요구가 급증하였다. 그로 인하여 초고압 케이블의 절연재료로서 가교폴리에틸렌이 사용되어지고 있다. 이에 본 논문에서는 초고압전력용 케이블에서 절연재료로 사용되고 있는 가교폴리에틸렌 (XLPE) 내부전계분포 및 파괴전압과의 상관관계를 알아보기 위해 케이블에 칩 전극을 삽입하여 두께를 0.5, 1, l.5 [mm] 변화시켜 파괴전계를 검출하였으며, 또한 와이블 해석을 통한 파괴전압의 척도파라미터룰 검출하여, 시뮬레이션 인가전압으로 사용하였다. 시뮬레이션 경계요소법 (BEM)을 이용한 3 차원 전계해석 프로그램으로 조사하였다.

• Journal of the Korean Ceramic Society
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• v.37 no.3
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• pp.240-246
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• 2000

The microwave dielectric properties of the complex perovskite (Pb0.5Ca0.5)(Fe0.5Ta0.5)O3 ceramics were investigated with the porosity and the dielectric mixing rule. Assuming that the specimens were mixtures of real dielectrics and pores, with 3-0 connectivity, the ionic polarizabilities modified by Maxwell's equation were more close to the theoretical values rather than those modified by Wiener's equation in porous specimens. The theoretical dielectirc loss were obtained with the infrared reflectivity spectra from 50 to 4000cm-1, which were calculated by Kramers-Kronig analysis and classical osciallator model. The relative tendency of dielectric loss calculated from the theoretical value and Maxwell's equation in the specimens with different porosities was in good agreement with the one by the post resonant method.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2002.05a
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• pp.165-167
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• 2002

Stable reset and address discharge are very important when they show apparent display. But the shape of reset and address discharge and wall-charge distribution change, according to the variation on temperature. Namely, it is very difficult to show exact picture. This study represents how Dynamic Margin is height and dielectric thickness. When barrier rib height is $100{\mu}m$ and dielectirc thickness is $40{\mu}m$, it is responded the most sensitively by decreasing temperature.