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