US Patent 10202682 Method of sputtering and sputter system

So as to control the operation of a sputter target during the lifetime of the target and under HIPIMS operation, part of a magnet arrangement associated to the target is retracted from the target whereas a second part II of the magnet arrangement is, if at all, retracted less from the addressed backside during the lifetime of the target. Thereby, part I is closer to the periphery of target than part II, as both are eccentrically rotated about a rotational axis.