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Solid-phase crystallization for polysilicon thin-film transistors (TFT's) is generally limited by a tradeoff between throughput and device performance. Larger grains require lower crystallization temperatures, and hence, longer crystallization times. In this letter, a novel crystallization technique is presented which increases both throughput and device performance, using a two-step process, controlled using an in situ acoustic temperature/crystallinity sensor. A high-temperature rapid thermaldoi:10.1109/55.605445 fatcat:dptyxkzwozejff7v6gbkhckt7a