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