{HEAD ~ A first reflective layer} may also be provided on {TAIL ~ top} of the insulating layer and extend onto the second angled sidewall 
{ HEAD ~ A first reflective layer } may also be provided on { TAIL ~ top } of the insulating layer and extend onto the second angled sidewall
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH