The method 1, wherein {HEAD ~ the quick wet etching process} comprises {TAIL ~ a step} of dipping the substrate into a wet etching tank containing an etchant 
comprises
The method 1 , wherein { HEAD ~ the quick wet etching process } comprises { TAIL ~ a step } of dipping the substrate into a wet etching tank containing an etchant
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH