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