GOLD ALLOY WIRE FOR BALL BONDING

摘要

[PROBLEMS] To provide a gold alloy wire which is excellent in the property of forming a melt ball, suitability for stitch bonding, and wire strength and, despite this, gives a press-bonded ball having excellent circularity, and which is usable in high-density wiring for a semiconductor device. [MEANS FOR SOLVING PROBLEMS] The gold alloy wire for use in ball bonding is made of a gold alloy comprising 10-50 mass ppm magnesium (Mg), 5-20 mass ppm europium (Eu), 2-9 mass ppm calcium (Ca), and gold (Au) having a purity of 99.995 mass% or higher as the remainder, wherein the calcium (Ca) content is up to half the europium (Eu) content by mass.