The ratio between the thickness of {HEAD ~ the thin elements} and {TAIL ~ thick patterns} is typically of from 1/5 to 1/10 
The ratio between the thickness of { HEAD ~ the thin elements } and { TAIL ~ thick patterns } is typically of from 1/5 to 1/10
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH