Low resistant metal is one of key factors in delay-time of large TFT-LCD. In this article low resistant metal aluminum has been investigated. After a-Si island etch process
it is found that remained Cl
2
had eroded aluminum. This has severity influence on products. By optimizing the etch process
more active SF
6
can remove remained Cl
2
in a-Si island etch process. So aluminum erodibility can be avoided.
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references
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