The solid heat conducting layer is {HEAD ~ a planar surface} in {TAIL ~ contact} with the electronic device 
in
The solid heat conducting layer is { HEAD ~ a planar surface } in { TAIL ~ contact } with the electronic device
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH