Method of fabricating a polysilicon thin film

Semiconductor device manufacturing: process – Formation of semiconductive active region on any substrate – Amorphous semiconductor

Reexamination Certificate

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C438S486000, C438S488000

Reexamination Certificate

active

07022591

ABSTRACT:
The present invention uses higher protrusions of an initially formed silicon layer as crystalline seeds in the subsequent crystallization step so that the newly-formed polysilicon thin film has smoother and bigger silicon grains, and has lesser density of protrusions. Furthermore, the polysilicon thin film of the present invention can be applied to form polysilicon thin film transistors or other devices.

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patent: 2004/0055999 (2004-03-01), Chen et al.
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patent: 2004/0201023 (2004-10-01), Yamazaki et al.
Brotherton et al., Excimer-Laser-Annealed Poly-Si Thin-Film Transistors inIEEE Transactions On Electron Devices, vol. 40, No. 2, pp. 407-413, Feb. 1993.
Zeng et al., A Novel Two-Step Laser Crystallization Technique for Low-Temperature Poly-Si TFTs inIEEE Transactions On Electron Devices, vol. 48, No. 5, pp. 1008-1010, May 2001.

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