A semiconductor wafer comprises substantially isolated chips, and the isolated chip comprises a main area 10 defined by first scribe lines 12 extending in a first direction and second scribe {HEAD ~ lines} 14 extending in {TAIL ~ a second direction} 
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A semiconductor wafer comprises substantially isolated chips , and the isolated chip comprises a main area 10 defined by first scribe lines 12 extending in a first direction and second scribe { HEAD ~ lines } 14 extending in { TAIL ~ a second direction }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL