{TAIL ~ The etching selectivity} can prevent over etching from harmfully affecting {HEAD ~ the leads} 17, which leads to fabrication of satisfactory products 
{ TAIL ~ The etching selectivity } can prevent over etching from harmfully affecting { HEAD ~ the leads } 17 , which leads to fabrication of satisfactory products
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH