{HEAD ~ Other polyimides} can be patterned by {TAIL ~ selective etching} of a conformal film or by casting 
{ HEAD ~ Other polyimides } can be patterned by { TAIL ~ selective etching } of a conformal film or by casting
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH