A Novel Source/drain on Void (SDOV) MOSFET Implemented by Local Co-Implantation of Hydrogen and Helium
Microelectronic engineering(2008)
摘要
In this paper a novel device named as SDOV MOSFET is proposed for the first time. This structure features localized void layers under the source and drain regions. The short channel effects of this device can be improved due to the SOI-like source/drain structure. In addition, without the dielectric layer under the channel region, this device can avoid some weaknesses of UTB SOI devices caused by the thin silicon film and the underlying buried oxide, such as mobility degradation, film thickness fluctuation and self-heating effect. Based on self-aligned hydrogen and helium co-implantation technology, the new device can be fabricated by a process compatible with the standard CMOS process. The SDOV MOSFETs with 50nm gate length are experimentally demonstrated for verification.
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关键词
UTB SOI,SDOV,SDOI,H+ and He+ co-implantation
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