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