The exposed top face of the IC chip has a plurality of contact areas or {HEAD ~ pads} around {TAIL ~ the periphery} of the chip for connecting the input/output leads of the various circuits within the IC chip to the multilayer circuit board 
around
The exposed top face of the IC chip has a plurality of contact areas or { HEAD ~ pads } around { TAIL ~ the periphery } of the chip for connecting the input / output leads of the various circuits within the IC chip to the multilayer circuit board
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH