In a method for making a GaN article, {TAIL ~ an epitaxial nitride layer} is deposited on {HEAD ~ a single crystal substrate} 
In a method for making a GaN article , { TAIL ~ an epitaxial nitride layer } is deposited on { HEAD ~ a single crystal substrate }
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD