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The HTS(high temperature superconductivity) magnetron cathode could generate strong magneticfield which is higher than that of conventional PM (permanent magnet) ones,therefore a lot ofspecial films could be prepared in lower gas pressure and longer target-substrate space.One 3-inchcircular planar magnetron cathode excited by HTS magnet is designed,fabricated and tested.TheHTS coils are fabricated with YBCO tapes,and the iron yoke is fabricated with 1J22 alloy.