The content of hydrogen and its depth profile in diamond like carbon (
DLC) films deposited by the microwave plasma deposition technique is d
etermined by Elastic Recoil Detection Analysis (ERDA) using 85 MeV Ni-
58 ions. Simultaneous defection of hydrogen and carbon recoils provide
d a method to determine the relative number of hydrogen:carbon atoms w
ithout using a standard H sample for quantitative calibration.