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Kink Effect in the Double-Gate Accumulation-Mode N-Channel Polysilicon Thin-Film Transistors

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Polycrystalline Semiconductors

Part of the book series: Springer Proceedings in Physics ((SPPHY,volume 35))

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Abstract

The kink behavior in drain current vs. drain voltage characteristics is studied in detail for an accumulation-mode n-channel polysilicon (poly-Si) thin-film transistors (TFT’s). The double- gate structure is utilized to control surface band-bending at the top and the bottom interface. Experimental results show that the interface quality strongly influences the kink behavior as a result of varying deqreesof hole accumulation in the substrate region. The kink is more pronounced in the bottom TFT than in the top TFT. This difference in kink behavior is closely linked to recrystallization method of poly-Si films. To avoid the kink effect, several methods are proposed. In particular, it should be noted that, unlike the case of an inversion-mode TFT, thinning a poly-Si film is ineffective this aim for an accumulation-mode TFT.

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© 1989 Springer-Verlag Berlin, Heidelberg

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Fuse, M., Sakata, Y., Inoue, T., Yamauchi, K., Yatsuda, Y. (1989). Kink Effect in the Double-Gate Accumulation-Mode N-Channel Polysilicon Thin-Film Transistors. In: Möller, H.J., Strunk, H.P., Werner, J.H. (eds) Polycrystalline Semiconductors. Springer Proceedings in Physics, vol 35. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-93413-1_50

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  • DOI: https://doi.org/10.1007/978-3-642-93413-1_50

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-93415-5

  • Online ISBN: 978-3-642-93413-1

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