A Novel CMOS Structure with Polysilicon Source/Drain (PSD) Transistors by Self-Aligned Silicidation (Special Issue on Sub-Half Micron Si Device and Process Technologies)
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概要
- 論文の詳細を見る
A novel CMOS structure has been developed using Ti-salicide PSD transistor formed by a new self-aligned method. Both N-channel and P-channel PSD transistors exhibit excellent short-channel behaviors down to the sub-half-micrometer region with shalow S/D junctions formed by dopant diffusion from polysilicons. New salicide process has been developed for the PSD structure and can effectively reduce the sheet resistances of the S/D polysilicon and the polysilicon gate to as low as 4〜5Ω/□. As a result, the low resistive local interconnects can be successfully implemented by the Ti-salicide S/D polysilicon merged with contacts by self-alignment. Moreover it is found that shallow Ti-salicide S/D junctions with the PSD structure can achieve approximately 1〜2 orders of magnitude lower area leakage current than that of the conventional implanted S/D junctions by eliminating implanted damage and preventing penetration of silicide into junctions with the elevated structure of S/D polysilicon layer. Furthermore CMOS ring oscillators having PSD transistors with an effective channel length of 0.4μm were fabricated using the salicided S/D polysilicon as a local interconnect between the N^+ and P^+ regions, and successfully operated with a propagation delay time of 50 ps/stage at a supply voltage of 5 V.
- 社団法人電子情報通信学会の論文
- 1993-04-25
著者
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INUISHI Masahide
Advanced Device Development Dept., Renesas Technology Corp.
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Tsukamoto Katsutoshi
The Faculty Of Engineering Osaka University
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Tsukamoto Katsutoshi
Faculty Of Engineering Osaka University
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INUISHI Masahide
LSI Laboratory, Mitsubishi Electric Corporation
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TSUKAMOTO Katsuhiro
LSI Laboratory, Mitsubishi Electric Corporation
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Inuishi Masahide
Advanced Device Development Dept. Renesas Technology Corp.
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Shimizu Masahiro
LSI Laboratory, Mitsubishi Electric Corporation
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Yamaguchi Takehisa
LSI Laboratory, Mitsubishi Electric Corporation
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Yamaguchi Takehisa
Lsi Laboratory Mitsubishi Electric Corporation
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- FOREWORD