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High performance low temperature polysilicon thin film transistor using ECR plasma thermal oxide as gate insulator

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3 Author(s)
Lee, Jung‐Yeal ; Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea ; Han, Chul‐Hi ; Kim, Choong‐Ki

Electron cyclotron resonance (ECR) plasma thermal oxide has been investigated as a gate insulator for low temperature (/spl les/600/spl deg/C) polysilicon thin-film transistors based on solid phase crystallization (SPC) method. The ECR plasma thermal oxide films grown on a polysilicon film has a relatively smooth interface with the polysilicon film when compared with the conventional thermal oxide and it shows good electrical characteristics. The fabricated poly-Si TFT's without plasma hydrogenation exhibit field-effect mobilities of 80 (60) cm/sup 2//V/spl middot/s for n-channel and 69 (48) cm/sup 2//V/spl middot/s for p-channel respectively when using Si/sub 2/H/sub 6/(SiH/sub 4/) source gas for the deposition of active poly-Si films.<>

Published in:

Electron Device Letters, IEEE  (Volume:15 ,  Issue: 8 )