How to improve the conductivity of printed silver paste in circuit board applications?

The conductivity of printed silver paste is a key factor in ensuring the stability and accuracy of circuit connections during the manufacturing process of circuit boards. In order to improve the conductivity of printed silver paste, optimization and adjustment can be carried out from multiple aspects. This article will explore in detail these optimization measures and present them to Advanced Institute (Shenzhen) Technology Co., LtdResearch Platinum Brand YB8604 Line Printing Silver PasteAs an example, demonstrate its excellent performance in practical applications.

1. Optimize the formula

Increase silver content
Metallic silver isConductive silver pasteThe main component of silver can significantly improve conductivity by increasing the silver content appropriately. However, when the silver content exceeds a certain limit, the improvement in conductivity is no longer significant and may affect other properties such as adhesive strength and curing characteristics. Generally speaking, a silver content within the range of 60% to 90% (by weight) is more suitable.

Select silver powder with appropriate particle size
The size of silver particles directly affects the conductivity. Fine particles can increase the probability of contact and improve conductivity. For example, the silver powder in the YB8604 line printing silver paste of Yanbo brand has a moderate particle size, which can ensure uniform printing patterns without obvious flowing or collapsing phenomena.

ADDITIVES
By adding dispersants, thickeners, stabilizers and other additives, the dispersibility, viscosity and stability of silver paste can be improved, thereby enhancing its conductivity. Dispersants can further improve the dispersibility of particles, thickeners can adjust the viscosity of the slurry, and stabilizers help prevent particle settling and agglomeration.

2. Improve the process

Accurately control printing parameters
Adjust the printing temperature, humidity, speed and other parameters to achieve the optimal state, ensuring that the silver paste is evenly printed on the substrate and forming a continuous conductive layer.Research Platinum Brand YB8604 Silver PasteThe viscosity is moderate, easy to print, and the printed pattern is uniform.

Optimize printing environment
Maintain the dryness, cleanliness, and temperature stability of the printing environment, and reduce the impact of external environment on the conductivity of silver paste.

Choose the appropriate printing method
Choose the appropriate printing method according to specific needs, such as screen printing, inkjet printing, etc., to ensure that the silver paste can be accurately and uniformly printed in the designated position.

3. Optimize curing conditions

Optimize curing conditions
By adjusting the curing temperature, time, and atmosphere, the organic components in the silver paste are fully evaporated or decomposed, and the silver powder particles are tightly bound to form a dense conductive layer. Improper curing conditions may lead to a decrease in the conductivity of silver paste.

Surface Treatment
Perform necessary surface treatment on the printed silver paste layer, such as cleaning, polishing, etc., to remove surface impurities and defects, improve conductivity and appearance quality.

4. Select high-quality raw materials

High quality silver powder
Select silver powder with high purity, uniform particle size, and regular shape as the conductive filler to ensure that the silver paste has good conductivity.

High performance resins and solvents
Select high-performance resins with good compatibility and excellent curing performance with silver powder as binders, as well as solvents with moderate volatilization speed and no corrosive effect on silver powder, to ensure stable performance of silver paste during printing and use.

5. Excellent performance

useAdvanced Institute (Shenzhen) Technology Co., LtdFor example, the YB8604 line printing silver paste produced by Yanbo brand has excellent printing and conductivity properties.

• Conductivity: YB8604 silver paste has a higher conductivity than ordinary silver alloy conductive silver paste and is close to the level of pure silver conductive silver paste, ensuring good conductivity.
• Viscosity: YB8604 silver paste has a moderate viscosity, is easy to print, and the printed pattern is uniform without obvious flow or collapse.
• Tensile strength: YB8604 silver paste has high tensile strength, strong adhesion to the substrate, and is not easy to peel off.
• Hardness: YB8604 silver paste has moderate hardness, good wear resistance, and is not easily scratched.
• Thermal conductivity and heat resistance: YB8604 silver paste has high thermal conductivity, good heat dissipation performance, and good heat resistance, which can maintain stable performance in high temperature environments.

conclusion

Improving the conductivity of printed silver paste requires multiple aspects such as formula optimization, process improvement, post-treatment improvement, raw material selection, and quality control and testing. The YB8604 line printing silver paste from Yanbo brand has achieved excellent conductivity and printing performance through reasonable formula design and optimized process parameters, providing strong support for circuit board manufacturing. With the continuous advancement and innovation of technology, it is believed that the performance of silver paste in future circuits will be further improved, injecting new vitality into the development of electronic products.
The above data is for reference only, and specific performance may vary due to production processes and product specifications.