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