a rotatable magnetron cathode comprising an elongated cylindrical tubular member , magnetic means disposed in said tubular member , a plurality of individual target strips provided with the same or different coating materials to be sputtered removably secured to the tubular member , said target strips extending the axial direction of the tubular member and disposed in spaced parallel relation around the periphery thereof , and means for rotating or indexing the tubular member to bring selected target strips in position for sputtering opposite the magnetic means .