文件类型:PDF文档
文件大小:75K
PROBLEM TO BE SOLVED : To make bonding wires uniform in mechanical strength. SOLUTION : A wire contains 1 to 100 wt. ppm of one or more elements selected from among rare elements, such as Be, Mg, Ca, Ge, Sn, In, Pb, Pd, Pt, Cu, Ag, and Y, the C content of the wire is set less than 1 wt. ppm, and the remainder includes Au and unavoidable impurities. The wire is cast by the use of a crucible of BeO, MgO, or ThO2 which contains less than 0.1 wt.% impurities.