Abstract
Au-coated Ag wire offers an oxidation-resistant layer and added benefitscomparedwith pure Ag wires. It can remain unchanged without any deterioration for long storage periods under ambient atmospheric conditions and features superior bond strength. The surface characterization, electrical properties at high temperature, and electrical tensile properties of both pure Ag and Au-coated Ag wires are investigated for reliability assessment. The experiment confirmed that an Au layer on the surface of Ag wire can increase oxidation resistance and tensile strength. The experiment utilizeda new test method, electrical tensile test, to confirm the performance of wires. The fractured surface from ductile to brittle fracture mode of the Au-coated Ag wirewas caused by electromigration. Moreover, electrical test data can beconsideredas a reference in IC and LED packaging industries.
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