Enhancement of On-Resistance Characteristics Using Charge Balance Analysis Modulation in a Trench Filling Super Junction MOSFET

Title
Enhancement of On-Resistance Characteristics Using Charge Balance Analysis Modulation in a Trench Filling Super Junction MOSFET
Authors
Jongmin GeumEun Sik Jung김용태Ey Goo KangMan Young Sung
Keywords
Super junction MOSFET; Trench filling; Trench angle; Charge balance
Issue Date
2014-05
Publisher
JOURNAL OF ELECTRICAL ENGINEERING & TECHNOLOGY
Citation
VOL 9, NO 3, 843-847
Abstract
In Super Junction (SJ) MOSFETs, charge balance is the most important issue of the SJ fabrication process. In order to achieve the best electrical characteristics, such as breakdown voltage and on-resistance, the N-type and P-type drift regions must be fully depleted when the drain bias approaches the breakdown voltage, which is known as the charge balance condition. In conventional charge balance analysis, based on multi-epi process SJ MOSFETs, analytical model has only N, P pillar width and doping concentration parameter. But applying a conventional charge balance principle to trench filling process, easier than Multi-epi process, is impossible due to the missing of the trench angle parameter. To achieve much more superior characteristics of on-resistance in trench filling SJ MOFET, the appropriate trench angle is necessary. So in this paper, modulated charge balance analysis is proposed, in which a trench angle parameter is added. The proposed method is validated using the TCAD simulation tool.
URI
http://pubs.kist.re.kr/handle/201004/50284
ISSN
19750102
Appears in Collections:
KIST Publication > Article
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