Abstract
The thin-film transistor liquid crystal display (TFT-LCD) industry has
in recent years demanded ever-larger-area substrate processing capability
to keep up with consumer market demands for larger and larger displays. This
paper discusses the latest plasma-enhanced chemical-vapor deposition (PECVD)
system, the AKT 50K PECVD, which handles up to ${\hbox{2160}}\times {\hbox{2460}}\ {\hbox {mm}}^{2}$ substrates.
As substrate size increases, lowering the processing temperature is getting
even more important to improve production reliability and cost performance.
The most commonly used process temperature for the so-called active layers
of amorphous silicon (a-Si) TFTs is approximately 350 $^{\circ}
{\hbox {C}}$. In this paper, a newly developed single-chamber
low-temperature PECVD active-layers process is discussed. In particular, our
low-temperature process maintains film performance at the same level as high-temperature
active layers while also maintaining system productivity and throughput.
© 2007 IEEE
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