In {HEAD ~ the above manufacturing method}, the n channel type TFT having {TAIL ~ the second gate electrode} is a TFT of the pixel portion 
In { HEAD ~ the above manufacturing method } , the n channel type TFT having { TAIL ~ the second gate electrode } is a TFT of the pixel portion
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH