removing {HEAD ~ a part} of an amorphous silicon film formed on a substrate having an insulating surface to form {TAIL ~ a region} for introducing metal elements that promote crystallization of silicon 
removing { HEAD ~ a part } of an amorphous silicon film formed on a substrate having an insulating surface to form { TAIL ~ a region } for introducing metal elements that promote crystallization of silicon
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH