Material Selection for Chip Packaging: Electrical Performance, Welding Architecture and Stress Management
- Core Material Selection
To ensure the long-term reliability, stability and high-performance output of semiconductor laser packaging, we adhere to a high-standard material selection strategy. Military-grade copper-tungsten (CuW) alloy is adopted as the key substrate material, combined with specially formulated gold-tin (AuSn) solder, and matched with high-quality imported laser chips. This integrated material system lays a solid foundation for the packaging structure, effectively addressing the core challenges of electrical conductivity, thermal dissipation and mechanical stability in the packaging process, and comprehensively guaranteeing the fundamental reliability and service life of the product.
- Excellent Electrical Performance of Chips
The excellent electrical performance of semiconductor laser chips is a key indicator that determines the overall performance of laser devices. It refers to the chip's outstanding performance in electrical conduction, current-carrying capacity, and electrical signal response under rated working conditions. This performance advantage is not only the core guarantee for the laser to achieve high power, high efficiency and stable operation, but also directly affects the device's service life, environmental adaptability and operational safety. The electrical performance of semiconductor laser chips plays a decisive role in the performance and stability of laser devices, mainly reflected in the following two aspects: low resistance and electrothermal stability. Low resistance ensures efficient electrical conduction, reduces energy loss and heat generation during operation. Electrothermal stability is critical as heat affects semiconductor operation; active cooling is usually adopted for heat dissipation. Delayed heat treatment causes thermal accumulation, accelerating chip material degradation and leading to rapid power attenuation or even burnout. The maximum junction temperature (X℃) is used as the characterization parameter to measure the chip's high-temperature resistance.