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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Institute of Electrical and Electronic Material Engineers
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Journal DOI :
The Korean Institute of Electrical and Electronic Material Engineers
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Volume & Issues
Volume 28, Issue 12 - Dec 2015
Volume 28, Issue 11 - Nov 2015
Volume 28, Issue 10 - Oct 2015
Volume 28, Issue 9 - Sep 2015
Volume 28, Issue 8 - Aug 2015
Volume 28, Issue 7 - Jul 2015
Volume 28, Issue 6 - Jun 2015
Volume 28, Issue 5 - May 2015
Volume 28, Issue 4 - Apr 2015
Volume 28, Issue 3 - Mar 2015
Volume 28, Issue 2 - Feb 2015
Volume 28, Issue 1 - Jan 2015
Selecting the target year
Properties of Reducing On-resistance for JFET Region in Power MOSFET by Double Ion Implantation
Kim, Ki Hyun ; Kim, Jeong Han ; Park, Tae-Su ; Jung, Eun-Sik ; Yang, Chang Heon ;
Journal of the Korean Institute of Electrical and Electronic Material Engineers, volume 28, issue 4, 2015, Pages 213~217
DOI : 10.4313/JKEM.2015.28.4.213
Device model parameters are very important for accurate estimation of electrical performances in devices, integrated circuits and their systems. There are a large number of methods for extraction of model parameters in power MOSFETs. For high efficiency, design is important considerations of a power MOSFET with high-voltage applications in consumer electronics. Meanwhile, it was proposed that the efficiency of a MOSFET can be enhanced by conducting JFET region double implant to reduce the On-resistance of the transistor. This paper reports the effects of JFET region double implant on the electrical properties and the decreasing On-resistance of the MOSFET. Experimental results show that the 1st JFET region implant diffuse can enhance the On-resistance by decreasing the ion concentration due to the surface and reduce the On-resistance by implanting the 2nd Phosphorus to the surface JFET region.
Characteristic of On-resistance Improvement with Gate Pad Structure
Kang, Ye-Hwan ; Yoo, Won-Young ; Kim, Woo-Taek ; Park, Tae-Su ; Jung, Eun-Sik ; Yang, Chang Heon ;
Journal of the Korean Institute of Electrical and Electronic Material Engineers, volume 28, issue 4, 2015, Pages 218~221
DOI : 10.4313/JKEM.2015.28.4.218
Power MOSFETs (metal oxide semiconductor field effect transistor) operate as energy control semiconductor switches. In order to reduce energy loss of the device during switch-on state, it is essential to increase its conductance. In this study we have investigated a structure to reduce the on-resistance characteristics of the MOSFET. We have a proposed MOSFET structure of active cells region buried under the gate pad. The measurement are carried out with a EDS to analyze electrical characteristics, and the proposed MOSFET are compared with the conventional MOSFET. The result of proposed MOSFET was 1.68[
], showing 10% improvement compared to the conventional MOSFET at 700[V].
A Study on Electrical Characteristic Improvement & Design Parameters of Power MOSFET with Single Floating Island Structure
Cho, Yu Seup ; Sung, Man Young ;
Journal of the Korean Institute of Electrical and Electronic Material Engineers, volume 28, issue 4, 2015, Pages 222~228
DOI : 10.4313/JKEM.2015.28.4.222
Power MOSFETs (metal oxide semiconductor field effect transistor) operate as energy control semiconductor switches. In order to reduce energy loss of the device, it is essential to increase its conductance. However, a trade-off relationship between the breakdown voltage and conductance of the device have been the critical difficulty to improve. In this paper, theoretical analysis of electrical benefits on single floating island power MOSFET is proposed. By the method, the optimization point has set defining the doping limit under single floating island structure. The numerical multiple 2.22 was obtained which indicates the doping limit of the original device, improving its ON state voltage drop by 45%.
Piezoelectric and Dielectric Properties of Low Temperature Sintering (Na,K,Li)(Nb,Sb,Ta)O
Ceramics Doped with CuO
Lee, Gwang-Min ; Yoo, Ju-Hyun ; Lee, Jie-Young ;
Journal of the Korean Institute of Electrical and Electronic Material Engineers, volume 28, issue 4, 2015, Pages 229~233
DOI : 10.4313/JKEM.2015.28.4.229
In this paper, in order to develop outstanding Pb-free piezoelectric composition ceramics, the
(x= 0~0.8 wt%)(abbreviated as NKL-NST) lead-free piezoelectric ceramics have been synthesized using the ordinary solid state reaction method. The effects of CuO-doping on the structure and electrical properties of the NKL-NST ceramics were systematically studied. The results show that the ceramics exhibit a pure perovskite structure with orthorhombic phase at room temperature, and secondary phase was found in the ceramics. The 0.4 wt%CuO added ceramics sintered at
showed the optimum properties of piezoelectric constant(
), planar piezoelectric coupling coefficient(kp) and mechanical quality factor(Qm) :
[pC/N], kp= 0.43, Qm= 423,respectively.
Electrocaloric Effect of [Bi
Han, Jong-Dae ; Yoo, Ju-Hyun ; Jeong, Yeong-Ho ;
Journal of the Korean Institute of Electrical and Electronic Material Engineers, volume 28, issue 4, 2015, Pages 234~237
DOI : 10.4313/JKEM.2015.28.4.234
In this work, in order to develop the ceramics with an excellent electrocaloric effect,
ceramics were fabricated by conventional solid state reaction method. The ceramics was observed as rhombohedral phase by X-ray diffraction patterns. To investigate the electrocaloric effect of the ceramics, P-E hysteresis loops were measured at various temperature. The temperature change
of these ceramics was calculated using the Maxwell's relations. The maximum value of temperature change
was obtained as 0.3
under applied electric fields 45 kV/cm.
Dissolved Gas Analysis of Environment-Friendly Vegetable Insulating Oils
Choi, Sun-Ho ; Kim, Kwan-Sik ; Huh, Chang-Su ;
Journal of the Korean Institute of Electrical and Electronic Material Engineers, volume 28, issue 4, 2015, Pages 238~243
DOI : 10.4313/JKEM.2015.28.4.238
The vegetable insulating oils are substitute for the mineral oil in power transformer. Vegetable insulating oils has higher flash/fire point and biodegradability than conventional mineral oils. In this paper, we investigated the dissolved gas analysis of vegetable oils. In the experiment, I had to accelerated aging under the same conditions mineral oil and vegetable oils. Accelerated aging proceeded to about 100% of the life of oil-filled transformer. In addition, we performed gas analysis of insulating oil of accelerated aging progress. The experiment results of the five gases was measured with the exception of Hydrogen and Acetylene. The mineral oil and vegetable oils gas is generated in a similar tendency depending on the accelerated aging. As a result, vegetable oils, can be dissolved gas analysis by method such as mineral oil.
Optical Characteristics of Plasmonic Nano-structure Using Polystyrene Nano-beads
Kim, Doo Gun ; Jung, Byung Gue ; Kim, Hong-Seung ; Kim, Tae-Ryong ; Kim, Seon-Hoon ; Ki, Hyun-Chul ; Kim, Tae-Un ; Shin, Jae Cheol ; Choi, Young-Wan ;
Journal of the Korean Institute of Electrical and Electronic Material Engineers, volume 28, issue 4, 2015, Pages 244~248
DOI : 10.4313/JKEM.2015.28.4.244
We proposed and demonstrated the double layered metallic nano-hole structure using polystyrene beads process to enhance the sensitivity of surface plasmon resonance (SPR). The double layered SPR structures are calculated using the finite-difference time-domain (FDTD) method for the width, thickness, and period of the metallic nano-hole structures. The thickness of the metal film and the metallic nano-hole is 30 and 20 nm in the 214 nm wide nano-hole size, respectively. The double layered SPR structures are fabricated with monolayer polystyrene beads of 420 nm wide. The sensitivities of the conventional SPR sensor and the double layered SPR sensor are obtained to 42.2 and 52.1 degree/RIU, respectively.
AAO Template Morphology Controlled by Variation of Anodizing Condition
Jo, Ye-Won ; Lee, Sung-Gap ; Kim, Kyeong-Min ;
Journal of the Korean Institute of Electrical and Electronic Material Engineers, volume 28, issue 4, 2015, Pages 249~251
DOI : 10.4313/JKEM.2015.28.4.249
In this study, the application of biosensor having a large surface area for more effective and AAO (anomic aluminium oxide) template in order to gain concentration and voltage of anodizing process morphology changes to the control of experiments were conducted. The biosensor surface may increase the response characteristics by having a large surface area. So the entrance to a little more efficient wide depth sensing experiment was carried out to obtain a structure body with a branch shape with a large surface area with increasing. Experimental results from the FE-SEM observation was obtained template morphology. As a result, depending on the anodizing time, the depth of the layer of aluminum oxide was found that it was confirmed that the deepening of the pore size changes according to anodizing condition. And measuring the detection performance according to the conditions in the electrolyte and the reaction because of blood using a biosensor measuring sensing property according to the depth of the pore depth is considered that does not have a significant impact.
Fabrication and Characterization of a Thermoelectric pn Couple Made of Electrospun Oxide Nanofibers
Lee, Donghoon ; Cho, Kyoungah ; Choi, Jinyoung ; Kim, Sangsig ;
Journal of the Korean Institute of Electrical and Electronic Material Engineers, volume 28, issue 4, 2015, Pages 252~256
DOI : 10.4313/JKEM.2015.28.4.252
In this study, we propose a novel fabrication of an oxide-based lateral thermoelectric pn couple and investigate the characteristics of the thermoelectric couple. Electrospun ZnO and
nanofibers are used as n- and p-legs of the couple, respectively. The Seebeck coefficients of the n- and p-type nanofibers and the pn couple are
, respectively. The thermoelectric couple generates an output voltage of
at a temperature difference of 4.1 K.
Thermoelectric Characteristics of a Thermoelectric Module Consisting of Chalcogenide Nanoparticles and Glass Fibers
Ryu, Hohyeon ; Cho, Kyoungah ; Choi, Jinyoung ; Kim, Sangsig ;
Journal of the Korean Institute of Electrical and Electronic Material Engineers, volume 28, issue 4, 2015, Pages 257~261
DOI : 10.4313/JKEM.2015.28.4.257
In this study, we fabricated a thermoelectric module made of nanoparticles (NPs) and glass fibers investigated its thermoelectric characteristics. P-type HgTe and n-type HgSe NPs synthesized by colloidal method were used as thermoelectric materials and glass fibers were used as spacers between the hot and cold electrodes of the thermoelectric module. In the module, the average Seebeck coefficients of the HgTe and HgSe NPs were 1260 and
, respectively. The p-n module generated about a voltage of 11.9 mV and showed a power density of
at a temperature difference of 7.5 K.
The Study on Activity Star Problem and Optimum Construction Method Through the Defect Case of Zero Energy House in the Existing Building
Kim, Sun-Geun ; Kwon, Soon-Wook ;
Journal of the Korean Institute of Electrical and Electronic Material Engineers, volume 28, issue 4, 2015, Pages 262~270
DOI : 10.4313/JKEM.2015.28.4.262
In this paper existing buildings, not a new buildings and house for living people not just a displaying and a viewing, created by the imagine effect or virtual simulation was applied various Active and Passive elements. After constructing zero-energy houses, through default case happened during operation period it is described problems and solutions about field part, work classification, installation by Location part, and Installation equipment part. Since then, to take advantage of this thesis, it's the purpose of this paper using as the baseline data for building a zero-energy house in another similar case.
A Study on the Design of a Floodlighting Tower with LED Source of Light Considering the Reduction of a Glare
Kim, Dong-Su ; Huh, Chang-Su ;
Journal of the Korean Institute of Electrical and Electronic Material Engineers, volume 28, issue 4, 2015, Pages 271~275
DOI : 10.4313/JKEM.2015.28.4.271
The floodlighting assists the pilot in taxiing the aircraft into and out of the final parking position and provide lighting suitable for passenger to embark and debark and for personnel to load and unload cargo. It is composed of sodium lamps which is consuming high energy. It needs to develop a dedicated LED lamp to replace the existing lamps. In this paper, We propose a suitable asymmetric angle of LED lamps to avoid a pilot's glare and to meet the standard illumination. For this, we analyze asymmetric angle of sodium lamps which are using in airport and confirm whether the illumination distribution and glare index meet the relating standards by using simulation method. Also, we study the needs of asymmetric characteristics of LED ramp by simulating the LED lamps with and without asymmetric characteristics of ramp respectively. With the simulation result, finally we propose the best asymmetric angle of LED lamp to meet the average illumination standard, and avoid a pilot's glare.