In the preferred embodiment of the invention, {HEAD ~ the thickness} of at least one interlayer is in {TAIL ~ the range} of about 1 μm to 20 μm and the total thickness for each of the other interlayers is at least 10 Å 
is in
In the preferred embodiment of the invention , { HEAD ~ the thickness } of at least one interlayer is in { TAIL ~ the range } of about 1 μm to 20 μm and the total thickness for each of the other interlayers is at least 10 Å
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH