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Recently, the international gold price has repeatedly hit new highs, leading to a sudden increase in raw material cost pressure in the LED packaging industry. As a traditional bonding wire material, the price fluctuation of gold directly affects the production cost of enterprises. In this context, some companies have turned to low-priced alternative materials such as copper alloys and silver alloys to reduce costs. However, as a company that has been deeply involved in the LED industry for many years, our company always adheres to the concept of "quality first" and insists on using 99.99% high-purity gold wire production to ensure product performance and long-term reliability.
The core difference between gold wire and alloy wire
Comparison of Material Characteristics
Gold wire (99.99% Au):
Excellent conductivity: low resistivity (2.44 μ Ω· cm), high current transmission efficiency, especially suitable for high-power LED packaging.
Anti oxidation and corrosion resistance: Strong stability in high temperature and high humidity environments, avoiding oxidation failure of bonding points.
Excellent extensibility: The wire curvature is uniform, the bonding strength is high, and the risk of wire breakage during the packaging process is reduced.
Alloy wire (such as Ag/Cu alloy, Pd coated wire):
Cost advantage: The price is only 30% -50% of gold wire, and the short-term cost reduction effect is significant.
Performance limitations: High resistivity (e.g. copper wire is 1.68 μ Ω· cm but prone to oxidation), poor matching of thermal expansion coefficient, and long-term use can lead to problems such as bond cracking and increased resistance.
Reliability testing data
High temperature and high humidity test (85 ℃/85% RH, 1000 hours): The resistance change rate of the gold wire bonding point is less than 3%, and the alloy wire generally exceeds 10%.
Thermal cycling test (-40 ℃~125 ℃, 500 times): The failure rate of gold wire is 0.1%, and the failure rate of alloy wire is 2% -5%.
Application scenario adaptability
Gold thread: widely used in fields such as automotive LED, high-end lighting, Mini/Micro LED, etc. that require strict durability and stability.
Alloy wire: commonly seen in low-end lighting, consumer electronics, and other cost sensitive and mild service environments.
Faced with the pressure of rising gold prices, we are well aware of the trade-off between short-term costs and long-term brand reputation:
Technical background support: By optimizing the packaging process (such as precise control of wire bonding parameters and miniaturization of gold wire diameter), we can reduce the gold consumption of individual devices while ensuring performance, and alleviate cost pressure.
Customer value orientation: High purity gold wire can extend the life of LED devices by more than 30%, reduce the repair rate and return risk of customer end products, and be more economical from the perspective of full lifecycle cost.
4、 Conclusion