| http://www.w3.org/ns/prov#value | - More specifically, ions including phosphorus ions are implanted into source and drain regions of the crystalline silicon film by known ion doping (also called plasma doping), then a P-type impurity ions (in this embodiment, ions including boron ions) are further implanted into the silicon film, and finally thermal annealing or optical annealing (or both) is performed to improve the crystallinity o
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