In the fields of new energy vehicles, rail transit, industrial control, etc., IGBT is the “big heart” of power control, but it is also a “big fan” of heat generation. High temperatures not only shorten lifespan, but may also lead to malfunctions or even shutdowns. So, how to make IGBT work calmly?
The answer is: high-performance thermal conductive material+precise coating process
Pain points in thermal management – three major challenges in IGBT module heat dissipation
High power density → instantaneous high heat generation
Poor working environment → -40 ℃~150 ℃ long-term fluctuation
High interface thermal resistance → Small air gaps hinder heat conduction
Application of screen printing thermal conductive silicone grease process in IGBT
Thermal conductive materials play a crucial role in the heat flow path, effectively controlling the temperature inside the module by conducting the heat from active devices to the external environment. The heat flow within the module depends on the layers in contact along the path.
Technological breakthrough – screen printing
Unlike traditional slurry coating methods, screen printing technology only applies thermal conductive compounds to the required areas. During this process, the required amount of thermal conductive
compound is determined by scanning the substrate surface.
Application of screen printing thermal conductive silicone grease process in IGBT
The blue or purple line represents the metal contact area with the heat sink, while the red line indicates the area that has not formed thermal contact with the heat sink. The cavities on the substrate need to be filled with thermal conductive compounds. To determine the required amount of thermal paste, the surface scanning area needs to be divided into a grid like distribution. For each grid point, it is necessary to accurately calculate the sufficient amount of thermal paste to be added.
Comparison between using screen printing and not using screen printing technology
Uniform and controllable coating thickness
Suitable for large-scale production
High material utilization rate
Can seamlessly connect with automated production lines
Better achieve thermal coupling
Material advantages
SIGR 2235 thermal conductive silicone grease is a high-performance thermal conductive material developed to address this issue. With a thermal conductivity of 3.5 W/m · K, wide temperature stability, and excellent dielectric properties, it has performed outstandingly in the field of electronic thermal management.
Screen printing thermal conductive silicone grease
Product advantages
High thermal conductivity: 3.5 W/m · K thermal conductivity, effectively reducing the thermal resistance between the device and the heat sink.
Wide temperature stability: -60 ℃~+250 ℃ for long-term stable operation, suitable for extreme environments.
Durable and non drying: No cracking or loss for 1000 consecutive hours at a high temperature of 180 ℃.
Low volatility: Long term use at high temperatures, volatile matter<1%, ensuring long-term performance.
Excellent dielectric properties: Volume resistance ≥ 2 × 10 ΩΩ· cm, suitable for precision electronic devices.
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Screen printing thermal conductive silicone grease
In the era of high power density and long lifespan, thermal management of IGBT has become the core of system reliability.
The combination of SIGR 2235 thermal conductive silicone grease and screen printing technology not only optimizes the thermal interface performance, but also provides an efficient solution for the large-scale stable production of power devices.
Efficient heat dissipation starts from the interface.
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Tags: IGBT heat dissipation adhesive · Thermal conductive silicone grease · Thermal conductive silicone grease screen printing
