Advantageously, a portion of {HEAD ~ each} of {TAIL ~ the primary solder land areas} are strategically masked during the manufacture of primary substrate 
of
Advantageously , a portion of { HEAD ~ each } of { TAIL ~ the primary solder land areas } are strategically masked during the manufacture of primary substrate
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH