Patent ID: 8118984

Claim:
A sintered sputtering target of refractory metals having a composition composed of one or more types of minor components selected from W, Ta and Hf at 5 at % to less than 50 at % and at least one or more major components as the remainder selected from Ru, Rh and Ir, the target having a structure including a metal matrix phase composed of the at least one or more major component with a granular minor component metal phase scattered within the metal matrix phase, a periphery of the granular minor component metal phase including an alloy phase or a compound phase of the major and the minor components and having an average width of 5 μm to 50 μm, and said granular minor component metal phase having an average grain size of 100 μm to 500 μm and the metal matrix phase having an average grain size of 10 μm to 30 μm.