Also includes assists that interrupt operation and require more than six minutes. Also see Generic Equipment Model and specific equipment model . The two different variables applied to the measurement of equipment reliability are productive time and equipment cycles . They are the productive state , the standby state , the engineering state , the scheduled downtime state , the unscheduled downtime state , and the nonscheduled state . ESD see electrostatic discharge .
Examples are nitride etch and oxide etch.
Also see anisotropic etch , preferential etch , dry plasma etch , reactive ion etch , and wet chemical etch . Examples are potassium hydroxide, buffered oxide etch, and sulfur hexafluoride. Also see polycrystalline silicon . Also see compensation and undercut . The deposition step of an evaporation operation is condensation.