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