Innovative technology and application prospects of conductive silver paste on LED alumina substrate

LED (Light Emitting Diode), as a new generation of lighting source, is widely used in various fields such as lighting, display, backlight, etc. due to its advantages of high efficiency, energy saving, and environmental protection. During the LED packaging process,Conductive silver pasteAs a bridge connecting LED chips with external circuits, its performance is crucial. Aluminum oxide substrate has become an ideal substrate material for LED packaging due to its excellent thermal conductivity, mechanical strength, and chemical stability. However, how to prepare conductive silver paste suitable for alumina substrates has become an important research topic in LED packaging technology.

Composition and preparation of conductive silver paste on LED alumina substrate

composition

The main components of conductive silver paste on LED alumina substrate includeSilver powder, glass powderAnd organic carriers. Specifically, silver powder, as the main conductive material, typically has a content between 75% and 85%, ensuring the high conductivity of the silver paste; Glass powder, as a binder, with a content ranging from 1% to 3%, facilitates the adhesion and sintering of silver powder on alumina substrates; Organic carriers are responsible for adjusting the viscosity and fluidity of silver paste, facilitating printing and processing.

Preparation process

traditionalConductive silver pasteThe preparation process often involves complex three roll rolling mill slurry and filtration processes, which not only have low production efficiency but also easily cause material loss. The latest LED aluminum oxide substrate conductive silver paste preparation technology has achieved efficient and energy-saving production by optimizing the formula and process flow. The specific process includes:

1. Raw material preparation: Select high-purity silver powder and glass powder, as well as stable organic carriers.
2. Mixing and dispersion: Advanced dispersion equipment is used to thoroughly mix silver powder, glass powder, and organic carrier to form a uniform slurry.
3. Grinding and sizing: By finely grinding and adjusting, the slurry is ensured to have excellent dispersibility and flowability.
4. Packaging and storage: Encapsulate and store the prepared conductive silver paste for future use.

Performance advantages

Conductivity and thermal conductivity

LED aluminum oxide substrate conductive silver pasteHaving high conductivity and good thermal conductivity, it can effectively reduce the junction temperature of LED chips, improve the service life and stability of LED products.

Sinterability

After sintering, the surface of the silver layer is dense and defect free, less prone to pits and small bumps, overall bright white and smooth, and the silver surface is uniform without any impurities. This excellent sintering performance makes the conductive silver paste of LED alumina substrate perform well in the packaging process.

Solderability and Welding Resistance

This conductive silver paste has excellent solderability and solder resistance, and can pass rigorous reliability testing to ensure stability and reliability during the LED packaging process.

application prospect

High power LED packaging

With the widespread application of high-power LED productsConductive silver pasteHigher requirements have been put forward for conductivity, thermal conductivity, and stability. LED aluminum oxide substrate conductive silver paste has become an ideal choice for high-power LED packaging due to its excellent performance.

High end electronic products

In high-end electronic products such as smartphones, tablets, and wearable devices, the integration of LED components is increasing, and the performance requirements for conductive silver paste are becoming increasingly strict. LED aluminum oxide substrate conductive silver paste provides reliable technical support for these high-end electronic products with its excellent performance.

In the field of new energy

LED lighting technology also plays an important role in new energy fields such as new energy vehicles and solar photovoltaics. The application of conductive silver paste on LED alumina substrates helps to improve the performance and reliability of products in these fields, promoting the rapid development of the new energy industry.

conclusion

The performance of conductive silver paste on LED aluminum oxide substrate, as a key material in LED packaging, directly affects the overall quality of LED products. By continuously optimizing the formula and preparation process, the conductive silver paste of LED alumina substrate has shown excellent performance in conductivity, thermal conductivity, sintering performance, weldability, and solder resistance. With the continuous advancement of technology and the expansion of application fields, conductive silver paste on LED alumina substrates will play a more important role in the LED industry, promoting the continuous innovation and development of LED technology.