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