Polysilicon thin film transistors with laser-induced solid phase

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

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438162, H01L 21268

Patent

active

059465620

ABSTRACT:
Polysilicon thin film transistors (TFTs) are formed on glass substrates by selectively etching a dielectric layer to expose portions of an amorphous silicon layer in areas of the substrate occupied by the thin film transistor forming a metal seed layer over the exposed portions of the amorphous silicon layer; and selectively annealing the exposed areas with a laser beam to transform the amorphous silicon layer to a polysilicon layer.

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