Method for manufacturing thin film transistor

Semiconductor device manufacturing: process – Making field effect device having pair of active regions... – On insulating substrate or layer

Reexamination Certificate

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C438S149000, C438S150000, C438S161000, C438S162000, C438S163000, C438S164000, C438S165000, C438S166000

Reexamination Certificate

active

07932138

ABSTRACT:
A method for manufacturing a thin film transistor with improved current characteristics and high electron mobility. According to the method, when an amorphous silicon thin film is crystallized into a polycrystalline silicon thin film by metal-induced crystallization, annealing conditions of the amorphous silicon thin film and the amount of a metal catalyst doped into the amorphous silicon thin film are optimized to reduce the regions of a metal silicide distributed at grain boundaries of the polycrystalline silicon thin film. In addition, oxygen (O2) gas or water (H2O) vapor is supplied to form a passivation film on the surface of the polycrystalline silicon thin film.

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