The first blocking layer contains 1×10 4 to 1.0 atomic % of {TAIL ~ a Group III or V element} in {HEAD ~ the Periodic Table} 
The first blocking layer contains 1×10 4 to 1.0 atomic % of { TAIL ~ a Group III or V element } in { HEAD ~ the Periodic Table }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD