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