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A Review of Silver Wire Bonding Techniques
Bin An1, Hongliang Zhou1,2, Jun Cao1,2
1School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo 454003, China.
Micromachines
|November 25, 2023
Summary
Silver wire bonding offers a cost-effective alternative to gold, enhancing semiconductor manufacturing. This review details silver wire types, manufacturing, bonding processes, and reliability challenges like corrosion and electromigration.
Area of Science:
- Materials Science
- Electrical Engineering
- Semiconductor Manufacturing
Background:
- Traditional gold wire bonding is costly.
- Silver wire bonding presents a significant cost-reduction opportunity.
- Advancements in silver wire technology are crucial for the electronics industry.
Purpose of the Study:
- To provide a comprehensive overview of silver wire bonding technology.
- To analyze the characteristics, manufacturing, and reliability of silver-based bonding wires.
- To identify future research directions for silver wire bonding.
Main Methods:
- Review of current research on pure, alloy, and coated silver wires.
- Analysis of manufacturing processes and their impact on wire performance.
- Investigation of bonding parameters affecting quality and reliability.
- Detailed examination of corrosion, electromigration, and intermetallic compound effects.
Main Results:
- Silver wire bonding significantly reduces costs.
- Different silver wire types (pure, alloy, coated) exhibit varied characteristics.
- Manufacturing and bonding parameters critically influence reliability.
- Corrosion (chlorination, sulfurization) and electromigration pose reliability challenges.
Conclusions:
- Silver wire bonding is a viable, cost-effective alternative to gold.
- Understanding and mitigating reliability issues is key for widespread adoption.
- Further research is needed to optimize silver wire performance and long-term stability.
