[en] Highly oriented films of YBa₂Cu₃O_7-x have been reproducibly prepared with the correct metal stoichiometry by dc magnetron sputtering from a single target of stoichiometric composition. To circumvent the resputtering effects, the magnetron used an unbalanced magnetic filed configuration to direct the plasma away from the substrate. Typical films have sharp superconducting transitions with T_c up to 93 K and ΔT_c (90%-10%) = 0.5 K, metallic resistivity above the transition with ρ₃₀₀/ρ₁₀₀ = 2-4, and J_c ≥ 1.5 x 10⁶ Acm² at 4.2 K. The temperature dependence of J_c obeys the flux creep model with activation energy U(0) = 75 meV