Patent ID: 7767041
Filing Date: 2010-08-03
Classification: C22C,C23C

Abstract:
1. A sputtering target for forming a Ag—Bi-base alloy film by sputtering, said sputtering target being made of a Ag—Bi-base alloy containing Bi in an amount of 0.1 to 3 at % with substantially all Bi in solid solution with Ag and being free of Cu except for unavoidable impurities, wherein the sputtering target made of a Ag—Bi-base alloy has an average intensity of precipitated Bi of 0.01 at % −1 or less, as represented by the following mathematical expression, the average intensity being obtained by selecting plural sites on a sputtering surface of the sputtering target and by measuring peak intensities of X-ray diffraction, according to an X-ray diffraction method, with respect to the Ag (111) plane, the Ag (200) plane, the Ag (220) plane, the Ag (311) plane, and the Bi (102) plane: where I Bi(102) represents a peak intensity (unit: counts per second (cps), the unit is the same in the following) of X-ray diffraction with respect to the Bi (102) plane; I Ag(111) represents a peak intensity of X-ray diffraction with respect to the Ag (111) plane; I Ag(200) represents a peak intensity of X-ray diffraction with respect to the Ag (200) plane; I Ag(220) represents a peak intensity of X-ray diffraction with respect to the Ag (220) plane; and I Ag(311) represents a peak intensity of X-ray diffraction with respect to the Ag (311) plane, and [Bi] represents a content of Bi (unit: at %) in the sputtering target made of the Ag—Bi-base alloy.