A surface on the other side of the wiring board is {HEAD ~ a heat radiating surface} which is thermally connected to {TAIL ~ the device forming surface} and operative to radiate heat generated at the device forming surface to the exterior 
A surface on the other side of the wiring board is { HEAD ~ a heat radiating surface } which is thermally connected to { TAIL ~ the device forming surface } and operative to radiate heat generated at the device forming surface to the exterior
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH