The substrate is in thermal communication with a plurality of N independently controllable components and {HEAD ~ a plurality} of {TAIL ~ input output contacts} for connecting the substrate to an external controller 
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The substrate is in thermal communication with a plurality of N independently controllable components and { HEAD ~ a plurality } of { TAIL ~ input output contacts } for connecting the substrate to an external controller
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH