ionbond tetrabond equipment allows the deposition of extremely hard, non-hydrogenated diamond like carbon coatings (dlc). door to door cycle times, generally under 3.5 hours, are much shorter than most dlc / diamond coati......ionbond tetrabond equipment allows the deposition of extremely hard, non-hydrogenated diamond like carbon coatings (dlc). door to door cycle times, generally under 3.5 hours, are much shorter than most dlc / diamond coating deposition cycles. tetrabond can be deposited on both carbide and steel due to low coating deposition temperature (under 150( c).