About the periphery of each pad grid array 11 is {HEAD ~ a plurality} of {TAIL ~ side pads} 13 and corner pads 14 
of
About the periphery of each pad grid array 11 is { HEAD ~ a plurality } of { TAIL ~ side pads } 13 and corner pads 14
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH