0 42 10 24 b c n 0 4 0 6 0 7 0 42 11 26 fe sup 2 0 42 7 5 18 he 0 2 0 42 1 2 2 5 dlc 0 42 0 6 1 5 coatingteflon b sup 0 2 0 2 0 4 2 n sup 0 3 0 2 0 1 0 7 0 5 3 5 b n 0 2 0 3 0 2 0 3 0 6 1 5 3 fe sup 2 0 2 0 3 1 5tefzel fe sup 1 0 15 3 1 20pet fe sup 1 0 42 5 12pg 901wc uv 0 68 fe cr ni b c n 0 4 0 6 0 7 3 6 3 2 w sub 2 c e beam evap 3 4 5 1 5______________________________________ it is clear that the polymers exhibit surface improvement after bombardment and kapton shows significant surface hardening when subjected to multiple ion bombardment kapton polyimide film was implanted with 0 4 mev boron 0 7 mev nitrogen and 0 6 mev carbon the implanted surface exhibited substantial improvements in surface smoothness hardness and wear resistance implanted specimens showed over thirty times greater hardness for simultaneous triple beam implantation and over ten times larger hardness.