Formation of concentric rings on the flaked surface of Mylar due to 250-keV H+-ion implantation

Abstract

Concentric rings formed on the flaked surface of Mylar after 250-keV H+-ion implantation (fluence: 8×1015 cm-2) have been observed. Unlike those in metallic glasses and in Si single crystals where similar features have been observed due to MeV-energy He+ implantation, the number of these rings is very limited. In some cases, several groups of such rings have been observed in a single flaked blister. The cause of formation of such features is discussed in the light of existing theories. © 1986 The American Physical Society.