Mechanical and Electrical Properties of Palladium-Coated Copper Wires with Flash Gold

Chia Yun Chang, Fei-Yi Hung, Truan-Sheng Lui

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Palladium-coated copper wire with flash gold (PCA) is a fine wire with an oxidation resistance layer. A new sulfidation test has been assessed in this work, confirming that PCA wires show better sulfidation corrosion resistance than either palladium-coated or bare copper wires. The sulfided surface of PCA was analyzed, along with its bonding strength and electrical properties. The metallurgic mechanism for formation of free air balls during the electric flame-off (EFO) process was identified. The flash gold layer of PCA wires can improve certain shortcomings, including: (1) efficiently promoting sulfidation corrosion resistance, (2) solving the problem of palladium segregation during the EFO process, (3) reducing the starting voltage, and (4) stabilizing the electrical resistivity of the bonding interface.

Original languageEnglish
Pages (from-to)4384-4391
Number of pages8
JournalJournal of Electronic Materials
Issue number7
Publication statusPublished - 2017 Jul 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry


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