Patent ID: 8663402

Claim:
A sputtering target comprising a target containing at least Co, Cr, Pt and B and having a target surface prepared by melting raw material, casting an ingot from the melted raw material, rolling the ingot to form a rolled blank, cutting a surface layer of a thickness of 1 to 10 mm from the rolled blank to form an exposed cut surface, and polishing the exposed cut surface of the rolled blank with sandpaper or a grindstone having an abrasive grain size of #80 to #400, wherein substances without ductility exist in a highly ductile matrix phase of said sputtering target at a volume ratio of 1 to 50%, surface defects of a size of 10 μm or more originating at locations of the substances without ductility as a result of cutting the rolled blank do not exist in said target surface, and said substances without ductility include intermetallic compounds, oxides, carbides, and carbonitrides, and wherein said substances without ductility have an average diameter of 0.5 to 50 μm, said highly ductile matrix phase has a Vickers hardness of 400 or less, and said substances without ductility have a Vickers hardness of 400 or more and at least 1.5 times the Vickers hardness of said highly ductile matrix phase.