{HEAD ~ A reflective layer} is provided over {TAIL ~ the insulating layer} and extends onto the second angled sidewall 
is provided over
{ HEAD ~ A reflective layer } is provided over { TAIL ~ the insulating layer } and extends onto the second angled sidewall
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH