1、 Introduction
The rapid development of integrated circuits has put forward extremely high requirements for the use of conductive silver paste for their internal connections.
Research Platinum Brand YB6003 Integrated Circuit Conductive Silver AdhesiveAs one of the core products of Advanced Institute (Shenzhen) Technology Co., Ltd., the dispersibility of silver particles directly affects its key indicators such as conductivity, reliability, and service life. An effective silver particle dispersion control strategy is not only the key to ensuring the quality of YB6003 products, but also an important factor in promoting the progress of integrated circuit conductive silver paste technology.
2、 Raw material screening
（1） Characteristics of silver powder
- Particle size and shape: For YB6003 integrated circuit conductive silver paste, silver powder with an average particle size of 1-3 microns and an approximately spherical shape is beneficial for dispersion and conductivity balance. The advanced institute adopts screening and shape screening technology to ensure the quality of silver powder.
- Surface treatment: Silver powder undergoes special surface treatment and is coated with organic ligands. Reduce surface energy to prevent agglomeration and be compatible with solvents and resin matrices. The company independently develops processes to precisely control the amount and uniformity of coating.
（2） Solvent and dispersant
- Solvent system: A multi-component mixed solvent containing high boiling esters and low boiling ketones. The synergistic effect provides a stable dispersion environment for silver particles.
- Dispersant selection: Customized polymer dispersant containing hydrophilic and hydrophobic groups. The hydrophilic group interacts with the surface ligand of silver powder, while the hydrophobic group is compatible with the system. Add 2% -4% to form a stable coating layer and improve dispersibility.
3、 Optimization of preparation process
（1） Pre mixed dispersion
- Ultrasonic pre dispersion: Initially, ultrasonic treatment is used to mix silver powder with some materials. The ultrasonic cavitation effect breaks the agglomeration and promotes the adsorption of dispersants. Control the ultrasound frequency of 20-40 kHz, power of 200-500 W, and time of 10-30 minutes to achieve efficient pre dispersion.
- Stirring and shearing synergy: After ultrasonic treatment, high-speed stirring (3000-6000 revolutions per minute) is combined with high-precision shearing (5000-10000 seconds ⁻¹). Stirring macroscopic mixing, shearing microscopic crushing. Control the temperature between 25-35 degrees Celsius to avoid affecting dispersion.
（2） Grinding post-treatment
- Grinding process: Special ceramic grinding medium and high-precision equipment for grinding. Control the grinding time for 2-4 hours, medium to material volume ratio of 2:1-3:1, and rotation speed of 1000-2000 revolutions per minute,Refine silver particlesAnd maintain dispersion.
- Vacuum defoaming filtration: After grinding, vacuum defoaming (vacuum degree 0.05-0.1 MPa) removes bubbles, high-precision filtration (1-5 microns) removes impurities, ensuring uniform dispersion and purity of silver particles.
4、 Quality inspection and evaluation
（1） Testing methods
Using scanning electron microscopy combined with image analysis software and laser particle size analyzer to detect the dispersion of silver particles, and indirectly evaluate the electrical resistivity and shear strength. The qualified reference is to set the resistivity fluctuation within ± 10% and the coefficient of variation of shear strength less than 5%.
（2） Feedback adjustment
Provide feedback on the process based on the test results. If the dispersibility is poor, analyze the reasons and optimize the raw materials or fine tune the process parameters. Ensure the dispersion of silver particles and stable product quality through a closed-loop control mechanism.
5、 Conclusion
In the field of integrated circuit conductive silver paste preparation, especially for the YB6003 product of Yanbo brand, the dispersion control of silver particles is a complex and systematic engineering. Advanced Institute (Shenzhen) Technology Co., Ltd. has successfully achieved precision screening of raw materials, deep optimization of preparation processes, and strict quality inspection and feedback adjustment mechanisms
YB6003 conductive silver adhesiveEffective control of dispersion of silver particles. This not only significantly improves the conductivity, bonding strength, and reliability of YB6003 products, but also provides valuable technical experience and innovative ideas for the silver particle dispersion control in the integrated circuit conductive silver adhesive industry. With the continuous development of integrated circuit technology, the requirements for the performance of conductive silver paste will continue to increase. The silver particle dispersion control technology still needs to be continuously explored and improved to promote the advancement of integrated circuit conductive silver paste technology to a higher level.
The above data is for reference only, and specific performance may vary due to production processes and product specifications.
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