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