Suppress of Substrate-Assisted Depletion Effects in Super Junction LDMOS on Thin Film SOI

Abstract:

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Conventional super-junction lateral double diffused MOSFET (SJ-LDMOS) fabricated on Silicon on Insulator (SOI) substrate suffers from low breakdown voltage under the same on-resistance due to substrate-assisted depletion effect. To suppress this effect, it is important to find the charge density in the inversion layer under buried oxide. In this paper, we propose a charge density equation and its formulation. The results were used in a 3D device simulator to optimize the device structure. The experimental results confirm that the equation is useful to optimize device performance. The breakdown voltage of structure increased 54% and on-state-resistance decreased 58% compared to conventional SJ device. The device fabrication procedure is fully compatible with mainstream SOI CMOS process.

Info:

Periodical:

Edited by:

Qingzhou Xu

Pages:

521-526

DOI:

10.4028/www.scientific.net/AMR.721.521

Citation:

C. Xia et al., "Suppress of Substrate-Assisted Depletion Effects in Super Junction LDMOS on Thin Film SOI", Advanced Materials Research, Vol. 721, pp. 521-526, 2013

Online since:

July 2013

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Price:

$35.00

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