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IEICE TRANSACTIONS on Electronics

Modulation of PtSi Work Function by Alloying with Low Work Function Metal

Jun GAO, Jumpei ISHIKAWA, Shun-ichiro OHMI

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Summary :

In order to reduce PtSi Schottky barrier height (SBH) for electron, we investigated modulation of PtSi work function by alloying with low work function metal, such as Hf (3.9 eV) and Yb (2.7 eV). Pt (10-20 nm)/Hf, Yb (0-10 nm)/n-Si(100) stacked structures were in-situ deposited at room temperature by RF magnetron sputtering method. In case of PtxHf1 - xSi formed at 400/60 min annealing in N2, SBH for electron was reduced from 0.85 eV to 0.53 eV with Hf thickness without increase of sheet resistance. Yb incorporation also affected the SBH modulation, however, the sheet resistance increased with increase of Yb thickness.

Publication
IEICE TRANSACTIONS on Electronics Vol.E94-C No.5 pp.775-779
Publication Date
2011/05/01
Publicized
Online ISSN
1745-1353
DOI
10.1587/transele.E94.C.775
Type of Manuscript
Special Section PAPER (Special Section on Fundamentals and Applications of Advanced Semiconductor Devices)
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