A smart car is more like a smart terminal than a car. It gives cars the attributes of an electronic product, paying equal attention to electronic and mechanical attributes, and will gradually surpass the latter to dominate the product definition and user experience of cars. It is precisely because of this that smart cars and traditional cars part ways in architecture.
As an "electronic product", smart cars pay more attention to data collection, processing and communication
Different from traditional cars, smart cars are no longer just mechanical components that determine the difference between products, but electronic components such as sensors, chips, and CAN buses. In fact, many users pay more attention to electronic components than to the machinery itself. It is precisely because of this that more and more manufacturers need such a product that can not only improve the overall quality of electronic components, but also fit the future development direction of "integration", "miniaturization" and "intelligent". ----Ceramic substrates emerged at the historic moment.
Why choose ceramic substrate
Ceramic substrates have many advantages that traditional substrates cannot match in improving the overall quality of electronic components, which are mainly reflected in the following points:
1. Higher thermal conductivity
The thermal conductivity of traditional MCPCB is 1~2w/mk, the thermal conductivity of copper itself is 383.8w/mk, but the thermal conductivity of the insulating layer is only about 1.0w/mk, which is better It can reach 1.8w/mk. Because of the insulation layer, the thermal conductivity of the copper substrate can only reach about 2w/mk. Compared with traditional materials, the thermal conductivity of alumina ceramic substrates is 15~35 w/mk, and the thermal conductivity of aluminum nitride ceramic substrates is 170~230 w/mk. The ceramic substrate uses a ceramic sheet as the substrate without the need for an insulating layer. The heat on the copper circuit is directly conducted to the ceramic sheet and dissipated, completely preserving the thermal conductivity of the ceramic sheet.
2. Corrosion resistance
The environment in which the internal parts of the car body are exposed when the car is running is very harsh, and they are often exposed to high temperatures and strong corrosion. According to reports, metal corrosion causes an average loss of US$150 to US$250 per car per year around the world. There are many car recalls caused by corrosion of car parts. The ceramic circuit board uses inorganic non-conductive ceramic as the base material, and then the metal is in direct contact with the ceramic. While it has strong corrosion resistance, it will not damage the sensor like metal-based materials.
3. More matching thermal expansion coefficient
The material of the sensor chip is generally silicon. The thermal expansion coefficients of ceramics and chips are close, so they will not change much when the temperature difference changes drastically.The deformation causes problems such as circuit desoldering and internal stress. This is something that ordinary metal material substrates cannot do.
4. High-end customized services
Siliton can provide customized services according to customer needs and carry out mass production according to the product design drawings and requirements given by users. Users can have more choices and be more user-friendly.
From mechanics to electronics, the iteration of automotive products is no longer just competition at the mechanical level such as engines and transmissions. In the future, the decisive points of competition between car companies will be autonomous driving, digital cockpit, and the upgrade of three-electric technology, and the iteration speed will be faster and faster.
