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