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자료유형
학술저널
저자정보
홍영성 (극동대학교) 강이구 (극동대학교)
저널정보
한국전기전자재료학회 Transactions on Electrical and Electronic Materials Transactions on Electrical and Electronic Materials 제18권 제4호
발행연도
2017.8
수록면
199 - 202 (4page)
DOI
https://doi.org/10.4313/TEEM.2017.18.4.199

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Silicon carbide (SiC) is being spotlighted as a next-generation power semiconductor material owing to the characteristiclimitations of the existing silicon materials. SiC has a wider band gap, higher breakdown voltage, higher thermal conductivity,and higher saturation electron mobility than those of Si . When using this material to implement Schottky barrier diode (SBD)devices, SBD-state operation loss and switching loss can be greatly reduced as compared to that of traditional Si. However,actual SiC SBDs exhibit a lower dielectric breakdown voltage than the theoretical breakdown voltage that causes the electricfield concentration, a phenomenon that occurs on the edge of the contact surface as in conventional power semiconductordevices. Therefore in order to obtain a high breakdown voltage, it is necessary to distribute the electric field concentrationusing the edge termination structure. In this paper, we designed an edge termination structure using a field plate structurethrough oxide etch angle control, and optimized the structure to obtain a high breakdown voltage. We designed the edgetermination structure for a 650 V breakdown voltage using Sentaurus Workbench provided by IDEC. We conducted field plateexperiments. under the following conditions: 15°, 30°, 45°, 60°, and 75°. The experimental results indicated that the oxide etchangle was 45° when the breakdown voltage characteristics of the SiC SBD were optimized and a breakdown voltage of 681 Vwas obtained.

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