The dielectric material has {HEAD ~ a polygonal shape} including {TAIL ~ a front face} and a bottom face 
The dielectric material has { HEAD ~ a polygonal shape } including { TAIL ~ a front face } and a bottom face
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH