Methods for Forming Crystalline IGZO Through Processing Condition Optimization
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United States of America Patent
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Jun 25, 2015
app pub date -
Dec 20, 2013
filing date -
Dec 20, 2013
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Abstract
Embodiments described herein provide method for forming crystalline indium-gallium-zinc oxide (IGZO). A substrate is provided. A layer is formed above the substrate using a PVD process. The layer includes indium, gallium, zinc, or a combination thereof. The PVD process is performed in a gaseous environment having a pressure of between about 1 mT and about 5 mT and including between about 20% and about 100% oxygen gas. The PVD process may be performed at a processing temperature between about 25° C. and about 400° C. The duty cycle of the PVD process may be between about 70% and about 100%.
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