Internal electrode conductive gold paste of low-temperature co fired ceramics (LTCC)

1、 Overview

Low temperature co fired ceramic (LTCC) technology is an advanced electronic packaging technology that integrates various electronic components and circuits on multi-layer ceramic substrates and performs co firing at lower temperatures (usually below 900 ℃). And LTCC'sinner electrodeConductive gold paste, is one of the key materials in this technology, which directly affects the performance and reliability of electronic devices.

2、 Composition of internal electrode conductive gold paste

Internal electrode conductive gold pasteIt is mainly composed of gold particles, inorganic additives, carriers, additives, and solvents mixed in a certain proportion. Among them, gold particles, as the main conductive material, usually have a content between 70% and 92%. Inorganic additives are used to improve the properties of the slurry, such as enhancing the co firing compatibility and printability after sintering. The carrier is used to adjust the viscosity and flowability of the slurry, making it easy to operate during the printing process. Additives and solvents play an auxiliary and regulatory role.

3、 Preparation method of conductive gold paste for internal electrode

Internal electrode conductive gold pasteThe preparation process is relatively simple, but requires precise control of the proportions of each component and the mixing process. Firstly, mix gold particles, inorganic additives, carriers, additives, and solvents in a certain proportion to form a uniform slurry. Then, the slurry is printed onto the LTCC ceramic tape using methods such as screen printing to form the desired electrode pattern. Finally, the ceramic strip is sintered together with the electrode to form a complete LTCC electronic device.

4、 Performance requirements for conductive gold paste of internal electrode

The performance requirements of conductive gold paste for internal electrodes mainly include the following aspects:

1. Conductivity: Gold paste should have good conductivity to ensure the normal operation of electronic devices.

2. Co firing compatibility: There should be good co firing compatibility between the gold paste and LTCC ceramic strip to reduce deformation and cracking during the sintering process.

3. Printability: Gold paste should have good printing performance to form clear and accurate electrode patterns on the raw ceramic tape.

4. Stability:wine of the best qualityStability should be maintained during storage and use, and phenomena such as layering and sedimentation should not occur easily.

5、 Summary

LTCC internal electrodeConductive gold pasteIt is one of the key materials in LTCC technology, and its performance directly affects the performance and reliability of electronic devices. Therefore, it is necessary to strictly control the proportion of each component and the mixing process during the preparation process to ensure that the gold paste has excellent performance. Meanwhile, with the continuous development of LTCC technology, the performance requirements for internal electrode conductive gold paste will also continue to increase.